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SIPROTEC Travelling Wave Recorder 7SE20 V01.10 Device Manual E50417-X0040-C000-A2 Preface Table of Contents Safety Notes 1 Device Structure 2 Travelling Wave Explorer 3 Assembly and Commissioning 4 Maintenance and Repair 5 Packing, Storage, and Transport 6 Technical data 7 Appendix A Glossary ii NOTE For your own safety, observe the warnings and safety instructions contained in this document, if available. Disclaimer of Liability Subject to changes and errors. The information given in this document only contains general descriptions and/or performance features which may not always specifically reflect those described, or which may undergo modifica- tion in the course of further development of the products. The requested performance features are binding only when they are expressly agreed upon in the concluded contract. Document version: E50417-X0040-C000-A2.03 Edition: 03.2025 Version of the product described: V01.10 Copyright Copyright © Siemens 2025. All rights reserved. The disclosure, duplication, distribution and editing of this document, or utilization and communication of the content are not permitted, unless authorized in writing. All rights, including rights created by patent grant or registration of a utility model or a design, are reserved. Trademarks SIPROTEC, DIGSI, SIGRA, SIGUARD, SIMEAS, SICAM, Insights Hub, and OT Companion are trademarks of Siemens. Any unauthorized use is prohibited. Preface Purpose of the manual The manual describes the function and use for traveling wave recorder 7SE20. Target Audience This manual is mainly addressed to protection system engineers, system configurers, commissioning engi- neers, persons entrusted with the setting, testing, and maintenance of fault recorder equipment, automation, selective protection, and control equipment, as well as operational crew in electrical installations and power plants. Scope The manual applies to the Travelling Wave Recorder 7SE20. Indication of conformity This product complies with the provisions of the Council of the European Communities on the harmonization of the laws of the Member States relating to protection and safety (Directive 2014/35/EU), electromagnetic compatibility (EMC Directive 2014/30/EU) and the efficient use of the radio spectrum (Directive 2014/53/EU Article 3, Para. 1-2), and the constraints on the use of hazardous substances in electric and electronic devices (RoHS Directive 2011/65/EU). This conformity has been verified by an evaluation performed by Siemens AG according to the Council Directive in accordance with the standard EN 61326-1 for the EMC Direc- tive, with the standad EN 61010-1 for Directive 2014/35/EU, with the standard EN 303413 V1.1.1 for the efficient use of the radio spectrum, and with the standard EN IEC 63000 for the RoHS Directive. The device has been designed and produced for industrial use. Customer support center Our Customer Support Center provides a 24-hour service. Siemens Electrification & Automation Global Support Single entry point Phone: +49 9131 1743072 E-mail: support.ea.si@siemens.com Additional Support For questions about the system, contact your Siemens sales partner. SIPROTEC, Travelling Wave Recorder, Device Manual 3 E50417-X0040-C000-A2, Edition 03.2025 Training Courses You can request the individual training course offer at our Training Center: Siemens AG Siemens Power Academy TD Phone: +49 911 9582 7100 Humboldtstraße 59 E-mail: poweracademy@siemens.com 90459 Nuremberg Internet: www.siemens.com/poweracademy Germany Notes on Safety The document is not a complete index of all safety measures required for operation of the equipment (module or device). However, it comprises important information that must be followed for personal safety, as well as to avoid material damage. Information is highlighted and illustrated as follows according to the degree of danger: ! DANGER DANGER means that death or severe injury will result if the measures specified are not taken. ² Comply with all instructions, in order to avoid death or severe injuries. ! WARNING WARNING means that death or severe injury may result if the measures specified are not taken. ² Comply with all instructions, in order to avoid death or severe injuries. ! CAUTION CAUTION means that medium-severe or slight injuries can occur if the specified measures are not taken. ² Comply with all instructions, in order to avoid moderate or minor injuries. NOTICE NOTICE means that property damage can result if the measures specified are not taken. ² Comply with all instructions, in order to avoid property damage. ii NOTE Important information about the product, product handling or a certain section of the documentation which must be given attention. Qualified Electrical Engineering Personnel Only qualified electrical engineering personnel may commission and operate the equipment (module, device) described in this document. Qualified electrical engineering personnel in the sense of this document are people who can demonstrate technical qualifications as electrical technicians. These persons may commission, isolate, ground and label devices, systems and circuits according to the standards of safety engineering. Preface 4 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 mailto:poweracademy@siemens.com http://www.siemens.com/poweracademy Proper Use The equipment (device, module) may be used only for such applications as set out in the catalogs and the technical description, and only in combination with third-party equipment recommended and approved by Siemens. Problem-free and safe operation of the product depends on the following: • Proper transport • Proper storage, setup and installation • Proper operation and maintenance When electrical equipment is operated, hazardous voltages are inevitably present in certain parts. If proper action is not taken, death, severe injury or property damage can result: • The equipment must be grounded at the grounding terminal before any connections are made. • All circuit components connected to the power supply may be subject to dangerous voltage. • Hazardous voltages may be present in equipment even after the supply voltage has been disconnected (capacitors can still be charged). • Operation of equipment with exposed current-transformer circuits is prohibited. Before disconnecting the equipment, ensure that the current-transformer circuits are short-circuited. • The limiting values stated in the document must not be exceeded. This must also be considered during testing and commissioning. Selection of symbols used on the device No. Symbol Description 1 Direct current, IEC 60417, 5031 2 Alternating current, IEC 60417, 5032 3 Direct and alternating current, IEC 60417, 5033 4 Ground terminal, IEC 60417, 5017 5 Protective-conductor terminal, IEC 60417, 5019 6 Caution, risk of danger, ISO 7000, 0434 7 Guideline 2002/96/EC for electrical and electronic devices Preface SIPROTEC, Travelling Wave Recorder, Device Manual 5 E50417-X0040-C000-A2, Edition 03.2025 Table of Contents Preface..........................................................................................................................................................3 1 Safety Notes................................................................................................................................................. 8 2 Device Structure......................................................................................................................................... 10 2.1 Scope and Key Features of the Device................................................................................11 2.2 Traveling Waves................................................................................................................11 2.3 Recording Traveling Waves................................................................................................12 2.4 Positioning of the Antenna................................................................................................14Connector pin-out of the voltage terminal Terminal point 1 2 3 4 5 6 7 8 Signal designation V1_P V1_N V2_P V2_N V3_P V3_N V4_P V4_N Power Supply Connection VH Note the following when connecting to the voltage terminal of the device: Cable cross-section AWG 18–12 (0.75 mm2 to 2.5 mm2) With bootlace ferrule AWG 18–12 (0.75 mm2 to 2.5 mm2) Stripped length of bootlace ferrules 7 mm (only use shielded lines and connect the shield to the grounding point of the device.) Permissible tightening torque at clamping screw 0.6 Nm Connection Cables The following applies to all voltage, current, and power supply connections: Min. rated voltage 300 V Minimum temperature of the lines 105 °C PE Port The equipment must be grounded at the protective grounding terminal before any connections are made. The line cross-section must be at least 4 mm2. The permissible tightening torque is 1.2 Nm. USB port The Type B USB port on the back of the device is used only for service purposes by Siemens AG. Device Structure 2.10 Device Connections 36 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 BNC Port The socket-type BNC ports (CH1 to CH8) on the back of the device are used only for service purposes by Siemens AG. SD Card Slot The SD card slot is on the front of the device. To ensure safe operation of the device, only use the supplied and approved industrial SD card. The SD card must not be removed from the device during operation. Ethernet Plug Connection The RJ45 type Ethernet plug connection is on the front of the device. Via this interface, you can configure the device with the Travelling Wave Explorer and load records from the device. Antenna Connection The device requires an external antenna. The socket-type SMA connection is on the back of the device next to the supply voltage connection (see Rear View, Page 73). ! DANGER Risk of fire due to ungrounded antenna. Disregarding this may result in fire, serious injuries, or death. ² Ground the antenna properly in accordance with the manufacturer’s instructions and ensure lightning protection. Device Structure 2.10 Device Connections SIPROTEC, Travelling Wave Recorder, Device Manual 37 E50417-X0040-C000-A2, Edition 03.2025 Travelling Wave Explorer 3.1 Elements in the Travelling Wave Explorer 39 3.2 Installation and Uninstallation 39 3.3 Project Management 40 3.4 System Management 44 3.5 Station Management 45 3.6 Line Management 46 3.7 Device Management 47 3.8 Records 53 3.9 Calculating the Fault Location 57 3 38 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Elements in the Travelling Wave Explorer In the Travelling Wave Explorer program, organize 7SE20 devices into systems and assign them stations and lines. Project A project comprises several systems, stations, lines between the stations, and the associated devices. For a project, Travelling Wave Explorer creates a file in .twe format on the PC. This file is used to store all data about the systems, stations, lines, and devices. When using Travelling Wave Explorer for the first time, create a new project. A new project always consists of a system with 2 stations, each with a device 7SE20 and a line. System A system comprises all associated stations and lines of a voltage level. It comprises at least 2 stations, one line, and 2 devices. In the System settings tab, enter the name of the line system and the voltage level. Station The station specifies the place where the devices are installed. A station consists of at least one device. In the Station settings tab, enter the name of the station. Line A line connects 2 stations. In the Line tab, enter the technical data of the line. For fault location, enter the line length in km and the propagation velocity of the wave vp in km/s. Assign one device to each of the two line ends. Device The Device is a 7SE20 device. An outgoing line is assigned to each device. In the Device tab, enter all parameters for the specified device. Installation and Uninstallation Installation To install the Travelling Wave Explorers, the following prerequisites apply: • The installation package with the .msi format has been loaded from SIOS. • Administration rights are required for installation. • The UDP and TCP protocols are permitted in the Firewall of the operating system for communication for the Travelling Wave Explorer. ² Start the installation package. ² Follow the instructions displayed regarding the license agreement. ² Select a suitable storage location for Travelling Wave Explorer. The default installation path is C:\Program Files\Siemens\Travelling Wave Explorer. ii NOTE When installation is started, a dialog field with the security function of the operating system will be displayed in the background. To continue installation, authorize the function. The entry Travelling Wave Explorer is located in the Siemens folder in the start menu. 3.1 3.2 Travelling Wave Explorer 3.1 Elements in the Travelling Wave Explorer SIPROTEC, Travelling Wave Recorder, Device Manual 39 E50417-X0040-C000-A2, Edition 03.2025 Uninstalling To uninstall the Travelling Wave Explorers, the following prerequisites apply: • Administration rights are required for uninstallation. • No instances of the Travelling Wave Explorer are active. ² Uninstall the Travelling Wave Explorer via the Windows system settings. ² Follow the instructions displayed. ii NOTE During uninstallation, the Travelling Wave Explorer is removed. The project files and settings are retained. ² If the Travelling Wave Explorer is active during uninstallation, a dialog field will be displayed. Select whether to close the processes automatically, continue uninstalling, or cancel uninstalling. Unsaved project settings of running processes may be lost. Reinstalling the Travelling Wave Explorers ² To reinstall the Travelling Wave Explorer or perform a software update, install the new version of the Travelling Wave Explorer program. Project Management Creating a New Project ² Start the program. ² On the start screen, select Create new project. - or - ² If a project is open, select the menu and click New project. A directory selection dialog is displayed. ² Navigate to the target directory. ² Assign a name for the project and confirm the selection. 3.3 3.3.1 Travelling Wave Explorer 3.3 Project Management 40 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [sc_Start_TWE, 1, --_--] Figure 3-1 Start Screen Travelling Wave Explorer [sc_Open_Menu, 1, --_--] Figure 3-2 Open the Menu in Travelling Wave Explorer Travelling Wave Explorer 3.3 Project Management SIPROTEC, Travelling Wave Recorder, Device Manual 41 E50417-X0040-C000-A2, Edition 03.2025 [sc_Menu_TWE, 1, --_--] Figure 3-3 Menu in Travelling Wave Explorer Opening an Existing Project ² Start the program. ² On the start screen, select Open existing project. - or - ² If a project is open, select the menu and click Open. A file selection dialog opens. Navigating in a File Path ² Enter the file path of the project file in the Location field. - or - ² In the list box, navigate to the file directory of the project file. ² Select the project file in .twe format and confirm the selection. Editing a Project ² Create a new project. - or - ² Open a project. ² Add, delete, or change elements of the project as required. The project is marked as modified by an asterisk after the project name. ² Select Save. The project changes are saved and the asterisk after the project name disappears. 3.3.2 3.3.3 Travelling Wave Explorer 3.3 Project Management 42 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [sc_Save_Project, 1, --_--] Figure 3-4 Saving a project Changing Project Settings Set out in the project settings if the traveling wave records are manually or automatically downloaded from the devices. In addition, set out the following for automatic downloading: • Intervaltime between 2 update cycles • The time lapse for which all traveling wave records are downloaded ii NOTE Automatic downloading of traveling wave records is not selected in the default settings. You can manually download traveling wave records even if automatic downloading is activated. ² Create a new project (3.3.1 Creating a New Project). - or - ² Open an existing project (3.3.2 Opening an Existing Project). ² In Traveling Wave Explorer select the button Open project settings. 3.3.4 Travelling Wave Explorer 3.3 Project Management SIPROTEC, Travelling Wave Recorder, Device Manual 43 E50417-X0040-C000-A2, Edition 03.2025 [sc_Open_project_settings, 1, --_--] Figure 3-5 Open the Project Settings The dialog Project Settings opens: [sc_Box_Project_Settings, 1, --_--] Figure 3-6 Changing the Project Settings ² If the automatic traveling wave records should be downloaded automatically, select the Automatic record download active check box. ² To set the time interval after which new traveling wave records should be searched, enter the desired value into the Interval time between two update cycles entry field. ² To set the time lapse for which the traveling wave records should be downloaded, enter the desired value into the Time period for records to be downloaded entry field. System Management Editing a System To edit a system, the following prerequisites must be met: • An existing project is open, see 3.3.2 Opening an Existing Project. • The Devices tab is selected. 3.4 3.4.1 Travelling Wave Explorer 3.4 System Management 44 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Adding a System ² Select the Add system icon. A new system is added to the project. The System Settings tab is shown on the right-hand side. [sc_Add_System, 2, --_--] Figure 3-7 Adding a system Editing System Properties The System Settings tab is displayed on the right-hand side. ² Assign a name for the new system. ² Set the voltage level of the system under Voltage Level. Deleting a System ² Select a system. ² Select the Delete selected item icon. ² Confirm the selection. [sc_Delete_System, 2, --_--] Figure 3-8 Deleting a system Station Management Editing a Station Adding a Station To edit a station, the following prerequisites must be met: 3.5 3.5.1 Travelling Wave Explorer 3.5 Station Management SIPROTEC, Travelling Wave Recorder, Device Manual 45 E50417-X0040-C000-A2, Edition 03.2025 • An existing project is opened, see 3.3.2 Opening an Existing Project. • The Devices tab is selected. • At least one system is created in the project. ² Select a system. ² Select the Add station icon in the toolbar. A new station is created. The Station Settings tab is displayed on the right-hand side. [sc_Add_Station, 2, --_--] Figure 3-9 Adding a station ² Assign a meaningful name for the station. Follow the instructions in 2.6.2 Station and Device Name. Renaming a Station ² Select the system and the station to be named. The Station Settings are displayed on the right-hand side. ² Assign a new name for the station. Deleting a Station ² Select a station. ² Select the Delete selected item icon. ² Confirm the selection. Line Management Editing a Line Creating a Line To create a line between 2 devices, the following prerequisites must be met: • A system has been created, see 3.4.1 Editing a System. • 2 stations have been created in a system, see 3.5.1 Editing a Station. • There is a device in each station of a system, see 3.7.1 Editing a Device. • The Lines tab is selected. ² Find a system. ² Select Add Line. 3.6 3.6.1 Travelling Wave Explorer 3.6 Line Management 46 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 The dialog Line Settings then opens. Editing the Line Properties Select the properties for the line in the Line Settings dialog. ² Enter a name for the line in the Name entry field. ² Enter the line length in km in the Length entry field. ² Enter the propagation velocity of the traveling wave on the line in the Velocity entry field. ² To add devices to the configured line, select a device for each end of the line in the list box that is shown. [sc_fg_Line_Settings_TWR, 1, --_--] Figure 3-10 Setting the Line Properties Renaming a Line ² Select a line. The Line Settings dialog opens on the right-hand side. ² Assign a new name for the line. The name is displayed in the Lines tab. The changed project is marked as modified. Deleting a Line ² Select a line. ² Select the Delete Selected Item button. ² Confirm the selection. Device Management Editing a Device To edit a device, the following prerequisites must be met: • An existing project is opened, see 3.3.2 Opening an Existing Project. • The Devices tab is selected. • There is at least one system and one station in the project. Adding a Device ² Select the system and the station to which you wish to add the device. 3.7 3.7.1 Travelling Wave Explorer 3.7 Device Management SIPROTEC, Travelling Wave Recorder, Device Manual 47 E50417-X0040-C000-A2, Edition 03.2025 ² Select Add device. [sc_Add_Device, 2, --_--] Figure 3-11 Adding a device A new device is created. The Device Settings tab is displayed on the right-hand side. Initially, only parameters Name and IP address are displayed. [sc_Device_Settings_IP_only, 1, --_--] Figure 3-12 Establishing a connection to the device, entering the IP address ² Name the device. Follow the instructions in 2.6.2 Station and Device Name. ² Specify the IP address of the device for which you wish to set parameters. In the delivery status, the IP address of the device is 172.16.60.60. The Travelling Wave Explorer now automatically connects to the device and displays all parameters of the device. Renaming the Device ² Select the system, station, and the device to be named. ² Enter the new name of the device. ² To apply the name, press Enter or click in another area of the Travelling Wave Explorer. In the Device tab and the Lines tab, the new device name is displayed under Line Settings. Editing the Device Parameters The Device Settings tab is displayed on the right-hand side. All device parameters are only displayed if the device is online. ² Set the device parameters as described in 3.7.3.3 Editing Setting Values. Travelling Wave Explorer 3.7 Device Management 48 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [sc_Device_Settings_7SE20, 1, --_--] Figure 3-13 Parameterization of a Device in Travelling Wave Explorer ii NOTE For an overview of the device parameters, see 2.6 Application and Setting Notes. Changing the IP Address ² Select the device to be assigned a new IP address. ² Change the IP address as described in 3.7.3.5 Changing the IP Address. Deleting a Device ² Select a device. ² Select the Delete selected item button. ² Confirm the selection. Restart the device ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. 3.7.2 Travelling Wave Explorer 3.7 Device Management SIPROTEC, Travelling Wave Recorder, Device Manual 49 E50417-X0040-C000-A2, Edition 03.2025 ² Select the Device Settings tab. ² Ensure that the device connection status is online. ² Select the Restart button. Ongoing write processes to the device are ended. During this time, no further inputs can be made. The device is restarted. Device Information Requesting Status Information Status information means, for example, device information, firmware information or SD card information. The amount of status information displayed depends on whether the device is in online or offline mode. ² Open a project. ² On the left-hand edge, select the Devices tab. - or - ² On the left-hand edge, select the Lines tab. ² Select a device from the system navigation. The parameters are displayed in the center of the window and the device status information is displayed on the right-hand edge. If thedevice is offline, the following status information is displayed: • Device and station name • IP address and connection status If the device is online, the online parameters and also the following status information are displayed: • MLFB and serial number • Firmware Version • Capacity and free storage capacity on the SD card • Status of time synchronization Requesting the Setting Values from the Device Automatic Request ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Device Settings tab. ² Ensure that the device connection status is online. The setting values are automatically loaded from the device and displayed. Manual Request of the Setting Values of the Device If you have locally changed the setting values and these have not yet been transferred to the device then you can request the setting values from the device once again. ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. 3.7.3 3.7.3.1 3.7.3.2 Travelling Wave Explorer 3.7 Device Management 50 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 ² Select the Device Settings tab. ² Ensure that the device connection status is online and that there are changed setting values. Changed setting values are marked as modified with an asterisk next to the parameter name. ² Select Fetch Settings. The current setting values of the device are requested and displayed. Previously changed setting values are overwritten and are no longer marked as modified with an asterisk in the parameter name. Editing Setting Values ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Device Settings tab. ² Ensure that the device connection status is online. ² Make sure that you have accessed the setting values of the device (3.7.3.2 Requesting the Setting Values from the Device). ² Change the setting values as required. All setting values are checked for validity. Invalid setting values are marked with invalid and are not sent to the device. New, valid setting values are labeled with modified. These can be sent to the device (3.7.3.4 Sending Changed Setting Values to the Device). Sending Changed Setting Values to the Device ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Device Settings tab. ² Ensure that the device connection status is online. ² Make sure that you have accessed the setting values from the device and displayed them (3.7.3.2 Requesting the Setting Values from the Device). ² Change the setting values as required. All setting values are checked for validity. Invalid setting values are marked with invalid and are not sent to the device. ² Select Transfer Settings. Valid setting values are sent to the device. During the send process, no further inputs can be made. All sent setting values are labeled with unmodified. Changing the IP Address ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Device Settings tab. ² Ensure that the device connection status is online. ² Make sure that you have accessed the setting values of the device and displayed them (refer to 3.7.3.2 Requesting the Setting Values from the Device). 3.7.3.3 3.7.3.4 3.7.3.5 Travelling Wave Explorer 3.7 Device Management SIPROTEC, Travelling Wave Recorder, Device Manual 51 E50417-X0040-C000-A2, Edition 03.2025 ² Use parameter IP address in the IP Configuration group to assign a new address for the device. All setting values are checked for validity. Invalid setting values are marked with invalid and are not sent to the device. ² Select Transfer Settings. Valid setting values are sent to the device. During the send process, no further inputs can be made. All sent setting values are labeled with unmodified. The connection to the device is reestablished with the new IP address. The new IP address is copied into the current project. ii NOTE A connection to the device is only possible with the new IP address. Make a note of the new IP Address and store it in a safe place. Ensure that the project is saved with the Save button after the IP address is changed. Device Position Initiating Positioning During the first time the device is commissioned or after structural changes to the antenna, the position of the antenna must be determined. The position is required for correct time synchronization. For more information on positioning refer to 2.4 Positioning of the Antenna. ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Device Settings tab. In the center of the screen, you can see the parameters of the selected device. On the right-hand side, the status of the device is displayed along with the last determined position. ² Ensure that the device connection status is online. ² Select Initiate antenna positioning process. The Antenna Position Determination window opens on the screen. ² Set the parameter Required GNSS antenna position accuracy. ² Set the parameter Minimum synchronization time for GNSS locking. ² To start the process, click OK. ² Confirm that position determination has started in the displayed message. Positioning is executed. The status of the positioning is shown. The results of the positioning are displayed and updated continuously. Monitoring Positioning You can check the status of an ongoing positioning process. ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Device Settings tab. ² Ensure that the device connection status is online. In the center of the window, you can see the parameters of the selected device. On the right-hand side, the status of time synchronization is displayed along with the last determined device position. The following are displayed: 3.7.4 3.7.4.1 3.7.4.2 Travelling Wave Explorer 3.7 Device Management 52 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Designation Meaning Possible values State Time synchronization state • Locked: Valid time synchronization • Asynchronous: Time synchronization not possible! Time accuracy Accuracy of the time synchroni- zation in ns Typical value: 20 ns Positioning process Indicates whether positioning is currently running • Valid: Position successfully determined. • In progress: Positioning is running • Inactive: No positioning is running Positioning accuracy Accuracy of the determined position in m Typical value: 5 m Number of satellites Number of satellites Typical value: 12 satellites Latitude Latitude of the position 52.5351172° Longitude Longitude of the position 13.2684688° Update firmware ² From the SIOS portal (https://support.industry.siemens.com/), download the current firmware for the device. ² Save the file with the ending .cms on your personal computer. ² Open a project. ² Select the device from the system navigation as described in 3.7.1 Editing a Device. On the right-hand side, next to the device parameters, the device status is displayed. ² Ensure that the device connection status is online. ² Select the FW Update button. A file selection dialog opens. ² Enter the storage path of the firmware file in .cms format. A window for entering the password opens. ² Enter the password. For how to change the password, refer to Changing the Firmware Password, Page 63. ² Start and confirm the update process. The update process is executed. The status of the process is continuously displayed in a window. The device restarts. ii NOTE During the firmware update, no further actions are possible until completion of the restart. Records Refreshing the Record Overview For fault location, the data from the record overview is used. Refresh the overview ofavailable records as follows: ² Open a project. 3.7.5 3.8 3.8.1 Travelling Wave Explorer 3.8 Records SIPROTEC, Travelling Wave Recorder, Device Manual 53 E50417-X0040-C000-A2, Edition 03.2025 https://support.industry.siemens.com/ ² On the left-hand edge, select the Device tab. ² Select a device from the system navigation. ² Select the Record overview tab. The overview of all records of the device is displayed. ² Select Refresh record overview. The current device records are requested and displayed. Download the records as a COMTRADE file. The records are saved in the project folder. [sc_Refresh_Record_Overview, 1, --_--] Figure 3-14 Refreshing the record overview Downloading the Traveling Wave Records Individually If you wish to download traveling wave records from the devices individually, proceed as follows: ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Record Overview tab. A list of available records for the device is displayed. If the list is empty, refresh the list, see 3.8.1 Refreshing the Record Overview. ² Select at least one traveling wave record. ² Select Download selected record(s). 3.8.2 Travelling Wave Explorer 3.8 Records 54 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [sc_Download_Selected_Records, 2, --_--] Figure 3-15 Downloading available records to the computer Optionally, you can download a record via the menu at the end of the row: ² Open the right-hand menu next to the desired record. ² Select Download record. [sc_Menu_Download_Record, 2, --_--] Figure 3-16 Downloading a record via the menu The records are saved in the project folder as a COMTRADE file and are available offline. During the download process, no further inputs can be made. ii NOTE If the download was unsuccessful, the records will be marked with no in the Downloaded column. Automatically Downloading Traveling Wave Records If Travelling Wave Explorer is open then the records can be automatically downloaded at regular intervals from the devices which are connected to it. Automatic downloading of records is not selected in the default settings. An automatic download is not performed on the following actions: 3.8.3 Travelling Wave Explorer 3.8 Records SIPROTEC, Travelling Wave Recorder, Device Manual 55 E50417-X0040-C000-A2, Edition 03.2025 • Firmware update • Restarting the device • Transmission of setting values • Manual download of a record is already in progress ² In Travelling Wave Explorer, select the project settings as described in 3.3.4 Changing Project Settings. ² Follow the instructions. Initiating a Test Record ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Record overview tab. The overview of all records of the device is displayed. ² Select Initiate test record. The test record is initiated. [sc_Initiate_Test_Record, 1, --_--] Figure 3-17 Manually initiating a test record ² Wait at least 10 seconds until LED 5 SD card write and LED 6 Trigger active go out on the device. ² Click the Refresh record overview button. The new record is displayed in the overview. The record can be downloaded and displayed in SIGRA (see 3.8.6 Opening a Record in SIGRA). Displaying the File Storage Location of Records ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Record Overview tab. 3.8.4 3.8.5 Travelling Wave Explorer 3.8 Records 56 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 The overview of all records of the device is displayed. ² Open the right-hand menu next to the desired downloaded record. ² Select Reveal record in file explorer. This menu option is only actively displayed if the record has already been downloaded. Microsoft Windows Explorer opens and the storage location of the record is displayed. [sc_Open_File_Location, 2, --_--] Figure 3-18 Displaying the File Storage Location of a Record or Opening the Record in SIGRA Opening a Record in SIGRA The SIGRA program must be installed for the following steps. ² Open a project. ² On the left-hand edge, select the Devices tab. ² Select a device from the system navigation. ² Select the Record Overview tab. The overview of all records of the device is displayed. ² Open the right-hand menu next to the desired downloaded record. ² Select Open record in SIGRA. This menu option is only actively displayed if the record has already been downloaded. SIGRA is started and the selected record is displayed. Calculating the Fault Location Before calculating the fault location, the Travelling Wave Explorer program searches for the matching records from both ends of the line. The program displays the records with the trigger times and the calculated fault location in a table. Start fault location as follows: ² Open a project. ² On the left-hand edge, select the Lines tab. ² Select a line from the system navigation. ² Select the Fault Location tab. 3.8.6 3.9 Travelling Wave Explorer 3.9 Calculating the Fault Location SIPROTEC, Travelling Wave Recorder, Device Manual 57 E50417-X0040-C000-A2, Edition 03.2025 The overview of all records of the device assigned to the line is displayed. The records themselves do not have to be stored on the computer. ² If not all records are displayed in the list yet, select Refresh record overview. An overview of the records from the assigned devices is requested. Only records with associated time stamps are displayed. Based on the time stamps, the fault location is calculated for all associated records, as described in 2.2 Traveling Waves, and displayed. The fault location is specified as the distance from the device in the first column. An icon displays if the fault location is on the line, in front of the line, or behind the line. The value only shows the actual distance from the fault location if the fault location is actually on the line. Icon Fault location On the line In front of the line or close to the 1st device Behind the line or very close to the 2nd device Examples: On November 28, 2023 at 16:31 p.m., a fault was identified on the line. The fault is located at a distance of 58.575 km, starting from Device A in Station 1. On November 25, 2023 at 9:16 a.m., a fault was identified on the line. The displayed value does not state the actual fault distance. On November 25, 2023 at 9:15 a.m., a fault was identified on the line. The displayed value corresponds to the line length and does not state the actual fault distance. [sc_TWE_FaultLocation, 2, --_--] Figure 3-19 Assigning the Records from Both Ends of the Line and the Position of the Fault You optionally apply a filter to hide all fault locations which are not on the line. Travelling Wave Explorer 3.9 Calculating the Fault Location 58 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [sc_TWE_filter_fault_location, 1, --_--] Figure 3-20 Hiding all Fault Locations outside the Monitored Line ² To display all fault locations, select the setting All faults. ² To display only the fault locations on the line, select the setting Internal faults only. Travelling Wave Explorer 3.9 Calculating the Fault Location SIPROTEC, Travelling Wave Recorder, Device Manual 59 E50417-X0040-C000-A2, Edition 03.2025 Assembly and Commissioning 4.1 Unpacking/Repacking a Device 61 4.2 Device Assembly 61 4.3 Antenna Assembly 62 4.4 Commissioning 63 4 60 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Unpacking/Repacking a Device Devices are tested prior to delivery. Devices are packed in the factory in a way that meets the requirements of standard ISO 2248. Unpacking a Device ² Check the packaging for external transport damage. Damaged packaging may indicate that the devices inside have also sustained damage.the cables and determine voltage-free status. ² Disconnect device from the supply voltage ² Wipe the device using a clean, dry cloth. Do not use solvents. Update firmware ² On the SIOS portal (https://support.industry.siemens.com/), check whether new firmware for the device is available. ² Carry out the firmware update as described in 3.7.5 Update firmware. Repair You are not permitted to perform troubleshooting or repairs on a defective device. ² If you suspect a defect in the device, send the device to the manufacturing facility. ² Use the original transport packaging or equivalent. Environmental protection hints Disposal of Old Equipment and Batteries (Applicable only for European Union and Countries with a Recycling System) The disposal of our products and possible recycling of their components after decommissioning has to be carried out by an accredited recycling company, or the products/components must be taken to applicable collection points. Such disposal activities must comply with all local laws, guidelines and environmental specifications of the country in which the disposal is done. For the European Union the sustainable disposal of electronic scrap is defined in the respective regulation for "waste electrical and electronic equipment" (WEEE). The crossed-out wheelie bin on the products, packaging and/or accompanying documents means that used electrical and electronic products and batteries must not be mixed with normal house- hold waste. According to national legislation, penalties may be charged for incorrect disposal of such waste. By disposing of these products correctly you will help to save valuable resources and prevent any potential negative effects on human health and the environment. ii NOTE Our products and batteries must not be disposed of as household waste. For disposing batteries it is necessary to observe the local national/international directives. 5.1 5.2 5.3 Maintenance and Repair 5.1 Maintenance 66 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 https://support.industry.siemens.com/ Disposal of Mobile Storage Devices (e.g. USB Sticks and Memory Cards) When disposing of/transferring mobile storage devices, using the format or delete functions only changes the file management information and does not completely delete the data from your mobile storage device. When disposing of or transferring a mobile storage device, Siemens strongly recommends physically destroying it or completely deleting data from the mobile storage device by using a commercially available computer data erasing software. REACH/RoHS Declaration You can find our current REACH/RoHS declarations at: https://www.siemens.com/global/en/home/products/energy/ecotransparency/ecotransparency-down- loads.html ii NOTE You can find more information about activities and programs to protect the climate at the EcoTransparency website: https://www.siemens.com/global/en/home/products/energy/ecotransparency.html Maintenance and Repair 5.3 Environmental protection hints SIPROTEC, Travelling Wave Recorder, Device Manual 67 E50417-X0040-C000-A2, Edition 03.2025 https://www.siemens.com/global/en/home/products/energy/ecotransparency/ecotransparency-downloads.html https://www.siemens.com/global/en/home/products/energy/ecotransparency/ecotransparency-downloads.html https://www.siemens.com/global/en/home/products/energy/ecotransparency.html Packing, Storage, and Transport Packing a Device • If you store the device after the incoming goods inspection, it must be packed in appropriate storage packaging. • If you wish to transport the device, pack it in transport packaging. Storage and Transport NOTICE Improper storage can cause damage to the device. ² Comply with all instructions regarding the storage area and storage temperature in order to avoid material damage. • Only store devices on which you have carried out an incoming inspection, thus ensuring that the warranty remains valid. • The storage area must be clean and dry to prevent the formation of condensation or ice. • If the device has been in storage for more than 2 years, connect it to the supply voltage for 1 to 2 days. This will cause the electrolytic capacitors to form on the printed circuit board assemblies again. Also do this before planned operation of the device. • If the device is to be shipped again, reuse the transport packaging. If other packaging is used, you must ensure that the stresses during transport do not exceed those specified in ISO 2248. The storage packing of the individual devices is not adequate for transport purposes. 6 68 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Technical data Supply Voltage Direct voltage Rated input voltage 110 V to 250 V Admissible input voltage tolerance -10 % of the rated value +20 % of the rated value Alternating voltage Rated input voltage 100 V to 230 V Power frequency 50 Hz to 60 Hz Admissible input voltage tolerance ± 10 % Power Max. power consumption 30 W Environmental Conditions ii NOTE Only operate the device in rooms. Temperature specifications Temperature during operation 0 °C to +40 °C Temperature during transport and storage -25 °C to +85 °C Humidity specifications Average relative humidity ≤ 75 % Maximum relative humidity 95 % on 30 days per year Condensation during operation Not permitted Condensation during transport and storage Permitted Other environmental information Maximum altitude above sea level 2000 m Degree of pollution 2 Fuses External fuse Miniature circuit breaker 6 A, characteristic C according to IEC 60898 Degrees of Protection Device IP20 7 SIPROTEC, Travelling Wave Recorder, Device Manual 69 E50417-X0040-C000-A2, Edition 03.2025 Structural Variant Housing Stainless steel Dimensions See 2.9 Dimensions Weight 5.8 kg Electrical Connections Current inputs, I1 to I4 Overvoltage category III Insulation Double ISO test voltage AC 2700 V, 1 min Current-carrying capacity For Irated = 5 A continuous, 100 ⋅ Irated for 1 s Voltage inputs, V1 to V4 Overvoltage category III Rated Voltage AC 125 V Insulation Protective impedance ISO test voltage 4 kV, surge voltage GNSS (time sync) Rated Voltage 3.3 V Insulation PELV Ethernet, USB Rated Voltage 5.0 V Insulation PELV Supply Voltage Overvoltage category II Insulation Double ISO test voltage DC 2 kV, 1 min EMC – Emitted interference (according to EN 61326-1, EN 55011) Radiated 30 MHz to 1000 MHz Class A Line-conducted 0.15 MHz to 30 MHz Class A ii NOTE Class A devices are devices that are suitable for use in all other areas except the residential area and such areas as are directly connected to a low voltage supply network that (also) supplies residential buildings. EMC – Immunity (According to EN 61326-1) HF fields EN 61000-4-3 3 V/m (80 MHz to 1 GHz) 3 V/m (1.4 GHz to 2 GHz) 1 V/m (2.0 GHz to 6 GHz) Technical data 70 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Electrostatic discharge test (ESD) EN 61000-4-2 4 kV contact discharge 8 kV air discharge Power-frequency magnetic fields EN 61000-4-8 3 A/m Voltage dips on supply voltage EN 61000-4-11 0 % during 1/2 period 0 % during 1 period 70 % during 25 periods Interruption to supply voltage EN 61000-4-11 0 % during 250 periods Fast transients EN 61000-4-4 2 kV (5/50 ns, 5 kHz) Surge voltages EN 61000-4-5 1 kV (bal.) 2 kV (unbal.) Line-conducted HF signals EN 61000-4-6 3 V (150 kHz to 80 MHz) Vibration and shock stress in stationary use Standards Description Vibration Test (sinusoidal) IEC 60068-2-6 Sinusoidal 2 Hz to 9 Hz: ± 1.5 mm amplitude 9 Hz to 200 Hz; 5 m/s2 acceleration Frequency sweep 1 octave/min 20 cycles in 3 axes perpendicular to one another Shock Test IEC 60068-2-27 Semi-sinusoidal Acceleration 40 m/s2 Duration 22 ms 3 shocks each in both directions of the 3 axes Seismic Tests IEC 60068-3-3 Sinusoidal 2 Hz to 35 Hz: 2 Hz to 8 Hz: ± 1 mm amplitude (horizontal axes) 2 Hz to 8 Hz:± 2 mm amplitude (vertical axes) 8 Hz to 35 Hz: 5 m/s2 acceleration (horizontal axes) 8 Hz to 35 Hz: 2.5 m/s2 acceleration (vertical axis) Frequency sweep 1 octave/min 1 cycle in 3 axes perpendicular to one another Vibration and shock stress during transport Standards Description Vibration Test (sinusoidal) IEC 60068-2-6 Sinusoidal 2 Hz to 9 Hz: ± 3.5 mm amplitude 9 Hz to 200 Hz: 10 m/s2 acceleration 200 Hz to 500 Hz: 15 m/s2 acceleration Frequency sweep 1 octave/min 20 cycles in 3 axes perpendicular to one another Shock Test IEC 60068-2-27 Semi-sinusoidal Acceleration 100 m/s2 Duration 11 ms 3 shocks each in both directions of the 3 axes Technical data SIPROTEC, Travelling Wave Recorder, Device Manual 71 E50417-X0040-C000-A2, Edition 03.2025 Appendix A.1 Figures 73 A.2 Meaning of the LEDs 74 A.3 Ordering Information and Accessories 74 A.4 Connection Diagrams 75 A 72 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Figures Front View [sc_Front_view_7SE20, 1, en_US] Rear View [sc_Rückansicht, 1, en_US] Top View [sc_Draufsicht Montage, 1, --_--] A.1 Appendix A.1 Figures SIPROTEC, Travelling Wave Recorder, Device Manual 73 E50417-X0040-C000-A2, Edition 03.2025 Meaning of the LEDs LED Name LED Status Meaning 1 Run off There is no supply voltage at the device. on There is a supply voltage at the device. 2 Error off The device is ready for operation. on The LED lights up red in the following situations: • The device is in system startup (max. 15 s). • The device is in the fault condition. • The SD card was removed. • The SD card is write-protected. flashes No SD card was inserted during device system startup. 3 SD card status LED – SD card status provides information about the fill level of the SD card. off At least 50 % of the storage capacity of the SD card is available. on 50 % to 80 % of the storage capacity of the SD card is filled with fault records. flashes More than 80 % of the storage capacity of the SD card is filled with fault records. The SD card must be replaced. 4 SD card read off No read access to the SD card on Read access to the SD card is running 5 SD card write off No write access to the SD card on Write access to the SD card is running 6 Trigger active off No trigger is currently active on A trigger is active, a fault record is being written to the SD card. 7 GNSS locked off Positioning has not yet been performed. No position is saved in the device. If the LED goes out during operation, the quality of the GNSS signal has deteriorated. flashes Positioning is in progress. Time synchronization is possible. on Positioning has been completed and the position data is saved in the device. The GNSS signal is available. 8 Sync – 1 PPS off The device is not yet synchronized or synchronization is no longer possible due to the loss of the GNSS signal. flashes The LED flashing in a second rhythm indicates the PPS signal. Ordering Information and Accessories Order number Description Order number 1 2 3 4 5 6 7 8 9 10 11 12 Travelling Wave Recorder 7SE20, antenna incl. 20 m antenna cable 7 S E 2 0 1 1 – 1 A A 1 2 Accessories Description Order number Antenna cable extension, 20 m C53207-A430-D280-1 SDHC memory card for 7KE85 P1Z2530 A.2 A.3 Appendix A.2 Meaning of the LEDs 74 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Connection Diagrams The following figures show the respective typical types of connection for current and voltage measurements. Connection of the V4 transformer is optional. [dw_type-of-connection-current_7SE20, 1, en_US] Figure A-1 Connection for current measurement [dw_type-of-connection-voltage_7SE20, 1, en_US] Figure A-2 Connection for voltage measurement A.4 Appendix A.4 Connection Diagrams SIPROTEC, Travelling Wave Recorder, Device Manual 75 E50417-X0040-C000-A2, Edition 03.2025 Glossary COMTRADE COMTRADE is a file format for storing oscillography and status data associated with transient faults in the electricity-supply system. GLONASS Global satellite navigation system, Russian system GNSS Global Navigation Satellite System GPS Global Positioning System PPS Pulse Per Second SIGRA SIGRA is licensed software for the evaluation of fault records. SIOS Siemens Industry Online Support TCP Transmission Control Protocol UDP User Datagram Protocol VPN Virtual Private Network 76 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Preface Table of Contents 1 Safety Notes 2 Device Structure 2.1 Scope and Key Features of the Device 2.2 Traveling Waves 2.3 Recording Traveling Waves 2.4 Positioning of the Antenna 2.5 LED Assignment and Device Status 2.6 Application and Setting Notes 2.6.1 Overview 2.6.2 Station and Device Name 2.6.3 Transformer Data 2.6.4 Connection between the Transformer and the Device 2.6.5 Resolution and Trigger Thresholds 2.6.6 Recording Events 2.6.7 Setting the GNSS Module 2.6.8 Configuration of the Ethernet Interface 2.6.9 Setting Notes for Fault Location 2.7 Evaluating a Traveling Wave Record with SIGRA 2.8 Monitoring Functions 2.9 Dimensions 2.10 Device Connections 3 Travelling Wave Explorer 3.1 Elements in the Travelling Wave Explorer 3.2 Installation and Uninstallation 3.3 Project Management 3.3.1 Creating a New Project 3.3.2 Opening an Existing Project 3.3.3 Editing a Project 3.3.4 Changing Project Settings 3.4 System Management 3.4.1 Editing a System 3.5 Station Management 3.5.1 Editing a Station 3.6 Line Management 3.6.1 Editing a Line 3.7 Device Management 3.7.1 Editing a Device 3.7.2 Restart the device 3.7.3 Device Information 3.7.3.1 Requesting Status Information 3.7.3.2 Requesting the Setting Values from the Device 3.7.3.3 Editing Setting Values 3.7.3.4 Sending Changed Setting Values to the Device 3.7.3.5 Changing the IP Address 3.7.4 Device Position 3.7.4.1 Initiating Positioning 3.7.4.2 Monitoring Positioning 3.7.5 Update firmware 3.8 Records 3.8.1 Refreshing the Record Overview 3.8.2 Downloading the Traveling Wave Records Individually 3.8.3 Automatically Downloading Traveling Wave Records 3.8.4 Initiating a Test Record 3.8.5 Displaying the File Storage Location of Records 3.8.6 Opening a Record in SIGRA 3.9 Calculating the Fault Location 4 Assembly and Commissioning 4.1 Unpacking/Repacking a Device 4.2 Device Assembly 4.3 Antenna Assembly 4.4 Commissioning 5 Maintenance and Repair 5.1 Maintenance 5.2 Repair 5.3 Environmental protection hints 6 Packing, Storage, and Transport 7 Technical data A Appendix A.1 Figures A.2 Meaning of the LEDs A.3 Ordering Information and Accessories A.4 Connection Diagrams Glossary2.5 LED Assignment and Device Status.................................................................................... 16 2.6 Application and Setting Notes........................................................................................... 17 2.6.1 Overview.....................................................................................................................17 2.6.2 Station and Device Name.............................................................................................17 2.6.3 Transformer Data........................................................................................................ 18 2.6.4 Connection between the Transformer and the Device.................................................. 19 2.6.5 Resolution and Trigger Thresholds............................................................................... 20 2.6.6 Recording Events.........................................................................................................26 2.6.7 Setting the GNSS Module.............................................................................................27 2.6.8 Configuration of the Ethernet Interface........................................................................28 2.6.9 Setting Notes for Fault Location................................................................................... 29 2.7 Evaluating a Traveling Wave Record with SIGRA.................................................................29 2.8 Monitoring Functions........................................................................................................34 2.9 Dimensions.......................................................................................................................34 2.10 Device Connections...........................................................................................................35 3 Travelling Wave Explorer........................................................................................................................... 38 3.1 Elements in the Travelling Wave Explorer.......................................................................... 39 3.2 Installation and Uninstallation........................................................................................... 39 3.3 Project Management.........................................................................................................40 3.3.1 Creating a New Project................................................................................................ 40 3.3.2 Opening an Existing Project......................................................................................... 42 3.3.3 Editing a Project.......................................................................................................... 42 3.3.4 Changing Project Settings............................................................................................ 43 3.4 System Management........................................................................................................ 44 3.4.1 Editing a System..........................................................................................................44 3.5 Station Management........................................................................................................ 45 3.5.1 Editing a Station.......................................................................................................... 45 3.6 Line Management............................................................................................................. 46 3.6.1 Editing a Line...............................................................................................................46 6 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 3.7 Device Management......................................................................................................... 47 3.7.1 Editing a Device...........................................................................................................47 3.7.2 Restart the device........................................................................................................ 49 3.7.3 Device Information...................................................................................................... 50 3.7.3.1 Requesting Status Information............................................................................... 50 3.7.3.2 Requesting the Setting Values from the Device....................................................... 50 3.7.3.3 Editing Setting Values............................................................................................ 51 3.7.3.4 Sending Changed Setting Values to the Device....................................................... 51 3.7.3.5 Changing the IP Address.........................................................................................51 3.7.4 Device Position............................................................................................................ 52 3.7.4.1 Initiating Positioning.............................................................................................. 52 3.7.4.2 Monitoring Positioning...........................................................................................52 3.7.5 Update firmware......................................................................................................... 53 3.8 Records.............................................................................................................................53 3.8.1 Refreshing the Record Overview.................................................................................. 53 3.8.2 Downloading the Traveling Wave Records Individually..................................................54 3.8.3 Automatically Downloading Traveling Wave Records.................................................... 55 3.8.4 Initiating a Test Record................................................................................................ 56 3.8.5 Displaying the File Storage Location of Records............................................................ 56 3.8.6 Opening a Record in SIGRA.......................................................................................... 57 3.9 Calculating the Fault Location........................................................................................... 57 4 Assembly and Commissioning....................................................................................................................60 4.1 Unpacking/Repacking a Device.......................................................................................... 61 4.2 Device Assembly............................................................................................................... 61 4.3 Antenna Assembly............................................................................................................ 62 4.4 Commissioning................................................................................................................. 63 5 Maintenance and Repair............................................................................................................................ 65 5.1 Maintenance.....................................................................................................................66 5.2 Repair............................................................................................................................... 66 5.3 Environmental protection hints......................................................................................... 66 6 Packing, Storage, and Transport................................................................................................................ 68 7 Technical data............................................................................................................................................ 69 A Appendix....................................................................................................................................................72 A.1 Figures............................................................................................................................. 73 A.2 Meaning of the LEDs......................................................................................................... 74 A.3 Ordering Information and Accessories............................................................................... 74 A.4 Connection Diagrams........................................................................................................75 Glossary...................................................................................................................................................... 76 Table of Contents SIPROTEC, Travelling Wave Recorder, Device Manual 7 E50417-X0040-C000-A2, Edition 03.2025 Safety Notes Management of Security-related Issues • To report a security vulnerability affecting a Siemens product or solution, contact Siemens via this Internet page: https://www.siemens.com/cert → Report a Security Issue • The Siemens policy on coordinated vulnerability disclosure is available at this page: https://www.siemens.com/cert → Security Vulnerability Handling and Disclosure Process • Information on validated security vulnerabilities that directly involve Siemens products are published in the Siemens Security Advisories: https://www.siemens.com/cert → Siemens Security Advisories Information on software and firmware updates including third-party components are part of the respective release notes. For more information, contact your local Siemens sales or project partner. Security Update Management For software and firmware updates, Siemens offers a systematic patch management service. For more infor- mation, refer to https://www.siemens.com/global/en/products/energy/energy-automation-and-smart-grid/grid- security/operational-security.html. ii NOTE The Travelling Wave Explorer tool uses .NET Framework version 4.7.2. The framework is part of the Microsoft Windows 10 and 11 operating systems. Siemens recommends activating and installing automatic updates for the operating system. This will ensure that any potential vulnerabilities in the .NET Framework are closed promptly. Network Security The device and the Travelling Wave Explorer program do not guarantee secure communication. No user authentication takes place. This means there is a risk that unauthorized users in the network will be able to read data or make unauthorized changes to settings on the devices. Therefore, Siemens recommends setting up a secure communication channel for data transmission. To avoid vulnerabilities, set up a virtual private network (VPN) and use a securely configured firewall. Siemens recom- mends using industrial VPN devices, such as SCALANCE S615. Install the Travelling Wave Explorer program on the computer in the control center and ensure that only authorized users have access to this computer. Note the instructions in the Secure Substation Manual. 1 8 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 https://www.siemens.com/cert https://www.siemens.com/cert https://www.siemens.com/cert https://www.siemens.com/global/en/products/energy/energy-automation-and-smart-grid/grid-security/operational-security.html https://www.siemens.com/global/en/products/energy/energy-automation-and-smart-grid/grid-security/operational-security.html https://cache.industry.siemens.com/dl/files/171/109759171/att_1128108/v1/SecureSubStation_SecurityManual_enUS.pdf [dw_TWR-network-security, 1, en_US] Figure 1-1 Example of a secure communication channel (1) Computer with installed Travelling Wave Explorer program (2) SCALANCE S615 (3) Device 7SE20 Safety Notes SIPROTEC, Travelling Wave Recorder, Device Manual 9 E50417-X0040-C000-A2, Edition 03.2025 Device Structure 2.1 Scope and Key Features of the Device 11 2.2 Traveling Waves 11 2.3 Recording Traveling Waves 12 2.4 Positioning of the Antenna 14 2.5 LED Assignment and Device Status 16 2.6 Application and Setting Notes 17 2.7 Evaluating a Traveling Wave Record with SIGRA 29 2.8 Monitoring Functions 34 2.9 Dimensions 34 2.10 Device Connections 35 2 10 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Scope and Key Features of the Device The device is used to record traveling waves in power systems. The device has the following key features: • 8 channels for recording signals, split into 4 current channels and 4 voltage channels The channels have a fixed assignment to the analog inputs. The signals are recorded with a sampling rate of 10 MHz. The assignment of the channels to the input terminals of the device can be found in the connection diagrams in the Annex A.4 Connection Diagrams. • An SD card for storing the records The device stores the fault records in COMTRADE format in accordance with IEC 60255-24:2013 and IEEE C 37.111:2013. All records are saved on the SD card. The records remain available after an auxiliary- voltage failure. • The integrated GNSS module sets an absolute time stamp at the start of recording. The GNSS module receives signals from GPS and GLONASS satellites. • Parameterization, evaluation of traveling wave records, and fault location are only possible with the help of external tools. – With the Travelling Wave Explorer tool, you can set the parameters of the device, download records, and determine the fault location. – Alternatively, you can use the SIGRA tool to evaluate records and determine the fault location. • Via an Ethernet interface, you can operate the device with the Travelling Wave Explorer tool and download the records. Traveling Waves Traveling waves occur due to abrupt changes in current and voltage in electrical systems. The following causes are possible: • Switching operations • Short circuits • Ground faults • Lightning strikes • Flashovers in live components A traveling wave propagates evenly towards the line ends at very high speed, starting from the point of origin. On overhead lines, the propagation velocity is approximately 293 000 km/s. This corresponds to approximately 98 % of the speed of light. In cables, the propagation velocity reaches approximately 67 % of the speed of light. The following figure shows the propagation of a traveling wave caused by a short circuit: 2.1 2.2 Device Structure 2.1 Scope and Key Features of the Device SIPROTEC, Travelling Wave Recorder, Device Manual 11 E50417-X0040-C000-A2, Edition 03.2025 [dw_principle_propagation_traveling-waves, 2, en_US] Figure 2-1 Propagation of traveling waves on a line Traveling waves are measured in the current signals and voltage signals at both ends of the line. In each case, the arrival of the traveling waves is marked with a precise time stamp. Based on the time stamps at both ends of the line, the following formula can be used to calculate the origin of the traveling wave: [fo_TW_FaultLocation_2side_formula, 1, en_US] where: x Distance from station A to the fault location l Line length Δt Difference tA - tB between the time stamps of both ends of the line v Propagation velocity of the wave With the Travelling Wave Explorer tool, you can evaluate the recorded data and determine the fault location. The Travelling Wave Explorer tool shows the associated traveling wave records for the line. To do this, it compares the time stamps of the records. 2 Records belong together if the time difference Δt meets the following condition: [fo_TW_max_delta_t, 1, --_--] Recording Traveling Waves The device creates traveling wave records. The records can be used for fault location using traveling waves. Traces in a Traveling Wave Record 8 analog channels and 9 binary traces are recorded in a traveling wave record. The traces are not configurable. Trace Type Meaning TW-IL1 Analog Current curve IA TW-IL2 Analog Current curve IB TW-IL3 Analog Current curve IC TW-IE Analog Current curve IG TW-UL1E Analog Voltage curve VAG TW-UL2E Analog Voltage curve VBG TW-UL3E Analog Voltagecurve VCG 2.3 Device Structure 2.3 Recording Traveling Waves 12 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Trace Type Meaning TW-UE Analog Voltage curve VG Trig. TW-IL1 Binary Trigger event in current curve IA Trig. TW-IL2 Binary Trigger event in current curve IB Trig. TW-IL3 Binary Trigger event in current curve IC Trig. TW-IE Binary Trigger event in current curve IE Trig. TW-UL1E Binary Trigger event in voltage curve VAG Trig. TW-UL2E Binary Trigger event in voltage curve VBG Trig. TW-UL3E Binary Trigger event in voltage curve VCG Trig. TW-UE Binary Trigger event in voltage curve VG Trig. TW-Manual Binary Manual triggering via the Travelling Wave Explorer program Recorded Frequency Range The device records the current signals and voltage signals in the frequency range from 10 kHz to 2 MHz. The sampling rate is 10 MHz. A band-pass filter suppresses the fundamental component. The fundamental component is therefore not included in the traveling wave record. Triggering a Traveling Wave Record The following events trigger the recording of a record: • Manual start via the Travelling Wave Explorer program • Trigger event in a current channel If the Trigger level current trigger threshold is exceeded in one of the channels TW-IL1, TW-IL2, or TW-IL3, a traveling wave record is triggered. The Trig. TW-IL1, Trig. TW-IL2, and Trig. TW-IL3 traces show the channels in which the trigger threshold was reached. • Trigger event in a voltage channel If the Trigger level voltage trigger threshold is exceeded in one of the channels TW-UL1E, TW-UL2E, or TW-UL3E, a traveling wave record is triggered. The Trig. TW-UL1E, Trig. TW-UL2E, and Trig. TW-UL3E traces show the channels in which the trigger threshold was reached. Trigger Thresholds Trigger thresholds specify the voltage or current value from which a traveling wave record is triggered. The trigger thresholds can be adjusted separately for the current channels and the voltage channels. Follow the setting notes in 2.6.5 Resolution and Trigger Thresholds. Record Duration The maximum length of a traveling wave record is 50 ms. The length is defined by parameters Pre trigger length and Post trigger length. These parameters define the length of the fault record before and after the trigger event. Follow the setting notes in 2.6.6 Recording Events. Time stamp When the trigger threshold is exceeded for the first time, the time is saved. The time determined in this way is entered in the traveling wave record as a time stamp. If there are records from both ends of the line, the time stamp can be used for fault location. ii NOTE The time stamp is always specified as a UTC time. Device Structure 2.3 Recording Traveling Waves SIPROTEC, Travelling Wave Recorder, Device Manual 13 E50417-X0040-C000-A2, Edition 03.2025 Example: The following figure shows a section of a traveling wave record for a 1-phase short circuit B-G. The trigger threshold was exceeded for all 3 phase currents and phase-ground voltages. The time stamp 21.11.2022, 05:42:10.550 specifies the time when a trigger threshold was exceeded for the first time. This time specifies the start of the edge of the 1st wave. [sc_faultrecording_trigger, 1, --_--] Figure 2-2 Section of a Traveling Wave Record Including Time Stamp The exact time stamp can be seen in the CFG file of the record: 21/11/2022,05:42:10.548366 ← 1st time stamp: Start of the record 21/11/2022,05:42:10.550366 ← 2nd time stamp: Trigger threshold exceeded for the 1st time, start of the edge of the 1st wave The 2nd time stamp is used for double-end fault location. Positioning of the Antenna For the 2-ended fault location, the time on both devices must be synchronized. Since the devices do not communicate directly with each other, time synchronization is only possible via GPS or GLONASS. To ensure precise time synchronization, the position of the devices is determined. To do this, the position and time signals from the GPS and GLONASS satellite systems are received via an integrated GNSS receiver. The device calculates its own position by measuring the runtime of the signal from each satellite. Before using the device, determine the position of the antenna. The determined position is saved in the device for later monitoring of time synchronization. The following conditions must be met for positioning: 2.4 Device Structure 2.4 Positioning of the Antenna 14 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 • Device 7SE20 is installed. • The antenna for receiving the GNSS signal is installed and connected to the device. To do this, follow the instructions in 4.3 Antenna Assembly. • In the Travelling Wave Explorer, a system with one or more stations and at least one device is created. • The parameters for the connection between the device and the antenna are saved in the device (see 2.6.7 Setting the GNSS Module). For how to set the parameters, see 3.7.3.3 Editing Setting Values. Always start positioning after the following events: • After initial installation of the device and the antenna • When there are structural changes in the vicinity of the antenna For how to start positioning in the Travelling Wave Explorer program, see 3.7.4.1 Initiating Positioning. Application and Setting Notes If you are starting positioning with the Travelling Wave Explorer program, set the following parameters: Parameter: Required GNSS antenna position accuracy Use parameter Required GNSS antenna position accuracy to set the maximum permissible devia- tion of the determined position from the actual antenna position. Set a value from 1 m to 100 m. Siemens recommends that you do not change the accuracy of the time synchronization from the default value of 5 m. Only increase the value if the receiving conditions are poor and the set precision value cannot be achieved. Parameter: Minimum synchronization time for GNSS locking For exact positioning, the GNSS receiver requires many satellite signals. Throughout the runtime, the number of satellite signals received and the positioning accuracy increase. Use parameter Minimum synchroniza- tion time for GNSS locking to set the minimum period for positioning. Set a value from 5 min to 1440 min. Siemens recommends that you do not change the default value of 1440 min (24 h). Reading the Position Accuracy During positioning, the position of the device is determined continuously. In the Travelling Wave Explorer program, read the current accuracy in the Device tab of the Device Settings window. To speed up positioning via the satellite signals received, increase the possible position radius with parameter Required GNSS antenna position accuracy. Completing Positioning If the threshold value of parameter Required GNSS antenna position accuracy has been reached or exceeded and the minimum observation time for parameter Minimum synchronization time for GNSS locking is reached, the process is complete. Ongoing positioning can be interrupted by restarting it with changed threshold vaues. To end the process prematurely, set the following: • Minimum observation time Minimum synchronization time for GNSS locking = 5 minutes • Increased position radius Required GNSS antenna position accuracy Restarting Positioning Positioning can be restarted. For this, the threshold values for parameter Required GNSS antenna position accuracy and parameter Minimum synchronization time for GNSS locking can be changed and set again. The information from the canceled positioning run is saved in the device so that the new positioning can be completed more quickly. Device Structure 2.4 Positioning of the Antenna SIPROTEC, Travelling Wave Recorder, Device Manual 15 E50417-X0040-C000-A2, Edition 03.2025 LED Assignment and Device Status Device 7SE20 has 8 light-emitting diodes on the front, which provide information about the current state of the device. These 8 LEDs are arranged on the left-hand side of the front of the device, as shown in figureFront View, Page 73. LED 1 – Run LED 1 Run lights up as soon as the device is connected to a supply voltage. LED 2 – Error LED 2 Error indicates that the device is in a fault condition. This LED must not be lit up during operation. During system startup, LED 2 Error lights up until initialization of the device is completed. When LED 2 Error goes out, the device is ready for use. In this case, the device can also be operated via the Ethernet Interface. If LED 2 Error does not go out during system startup, this can indicate problems with the SD card or the device. In this case, follow the instructions in 2.8 Monitoring Functions. Check whether an SD card is inserted and whether write protection has been deactivated for the card. If LED 2 Error is flashing, no SD card has been inserted. LED 3 – SD card status LED 3 – SD card status provides information about the fill level of the SD card. • If this LED is not lit up, at least 50 % of the storage capacity of the SD card is still available. • If the LED lights up, 50 % to 80 % of the card is filled with records. • If the LED is flashing, this indicates that more than 80 % of the card is filled with records. LED 4 – SD card read LED 4 – SD card read indicates read access to the SD card, for example when a record is requested via the Ethernet interface. LED 5 – SD card write LED 5 – SD card write indicates write access to the SD card. If the record is being saved on the SD card after triggering, the LED will light up. NOTICE An interruption during write access can make the records saved on the SD card unreadable. ² Do not switch off the device during write access to the SD card. LED 6 – Trigger active LED 6 Trigger active indicates triggering of the traveling wave recorder. In at least one channel of the device, it has been determined that the input signal threshold-value has been exceeded, and a recording has been triggered. LED 6 – Trigger active goes out as soon as all records from the buffer have been saved on the SD card. LED 7 – GNSS locked The precise position of the antenna of the GNSS receiver is determined before using the device. The position data of the device or the antenna is determined over a long period of time and saved in the device. The position data is required for time synchronization. The following statuses are indicated by the LED: 2.5 Device Structure 2.5 LED Assignment and Device Status 16 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 • LED off: Saved position data is not available. Time synchronization is not possible. • LED flashes: Determination of the positioning has not yet been completed. Time synchronization is possible, even if determination of the position has not yet been completed. • LED on: The position data is available. Time synchronization is possible. If LED 7 GNSS locked goes out again during operation, the quality of the GNSS signal has deteriorated. Check the position of the antenna and the correct connection to the device. LED 8 – Sync – 1 PPS The blinking of LED 8 Sync – 1 PPS at one-second intervals indicates the presence of the PPS pulse. If LED 8 Sync – 1 PPS remains off then the device is no longer synchronized. In this case, check the position of the antenna and the correct connection to the device. ii NOTE For additional information on the possible fault statuses, refer to 2.8 Monitoring Functions. Application and Setting Notes Overview To display the channels correctly in the fault records, the device requires information about the system and the respective channels. This information is made available to the device via the parameters. Set the device parameters using the Travelling Wave Explorer program. A description of these parameters and their effect on the fault records follows. Station and Device Name Use the station name and the device name to assign a traveling wave record to a device. Both names are entered in the record in accordance with the COMTRADE standard IEC 60255-24:2013 and IEEE C 37.111:2013. The names are displayed in SIGRA or another COMTRADE viewer. The start of the file name for a record is also composed of the station name and the device name. The names are followed by the date, the time, and the trigger time in ns. The runtime on the cable between the transformer and the device is not taken into account in the trigger time in the file name. ____.cfg Example: There is a record from the following device with the following time stamp: • Station name: Berlin • Device name: 7SE20 • Date: June 14, 2023 • Time: 08:58:54 • Time stamp in ns: 304900120 The file name of the fault record is as follows: Berlin_7SE20_20230614_085854_304900120.cfg 2.6 2.6.1 2.6.2 Device Structure 2.6 Application and Setting Notes SIPROTEC, Travelling Wave Recorder, Device Manual 17 E50417-X0040-C000-A2, Edition 03.2025 Parameter: Station name • Default setting: Station name = Station Use parameter Station name to specify the name of the station in which the device is installed. A maximum of 15 alphanumeric characters are available for this. When a record is saved, the station name is entered in the CFG file of the record. Parameter: Device name • Default setting: Device name = Device Use parameter Device name to define a name for the device within the station. A maximum of 15 alphanu- meric characters are available for this. When a fault record is saved, the device name is entered in the CFG file of the record in addition to the station name. Transformer Data To detect traveling waves, connect the device directly to the current and voltage transformers in a system. The following parameters can be used to configure the current and voltage channels in the device: Parameter: Rated primary current • Default setting: Rated primary current = 1000 A Use parameter Rated primary current to set the primary current of the 3-phase current transformer. Set a value from 1 A to 100 000 A. Parameter: Rated secondary current • Default setting: Rated secondary current = 1 A Use parameter Rated secondary current to set the secondary current of the 3-phase current trans- former. Set a value of 1 A or 5 A. Parameter: Star point • Default setting Star point = LINE Use parameter Star point to set the direction of the neutral point in the current transformer in accordance with the following figure. The neutral point can face either the direction of the line or the direction of the busbar. The default setting for the parameter is LINE. If you switch the parameter to BUSBAR, the direction of the phase currents and the ground current IN will be changed within the device. 2.6.3 Device Structure 2.6 Application and Setting Notes 18 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [dw_polstromwdl_7SE20, 1, en_US] Figure 2-3 Polarity of the current transformer Parameter: Rated primary voltage • Default setting: Rated primary voltage = 400 kV Use parameter Rated primary voltage to set the primary voltage of the 3-phase voltage transformer. Set a value from 0.2 kV to 1200 kV. Parameter: Rated secondary voltage • Default setting: Rated secondary voltage = 100 V Use parameter Rated secondary voltage to set the secondary voltage of the 3-phase voltage trans- former. Set a value from 80 V to 230 V. Connection between the Transformer and the Device For fault location, the time of arrival of the wave at the end of the line is required. This is where the current and voltage transformers are installed. But the time stamps are only assigned in the device. The propagation of the traveling wave in the secondary cabling delays the trigger event. Therefore the trigger signal is recorded by the device with a time delay. The time delay is subtracted from the time of the trigger event to obtain the correct time stamp. To do this, enter the length of the cable and the propagation velocity on this cable. These values are set separatelyfor the current transformer and the voltage transformer. Only one of these two setting values is effective. If a current signal initially initiates a trigger signal then the Velocity factor cable CT setting value becomes effective. If a voltage signal initially initiates a trigger signal then the Velocity factor cable VT setting value becomes effective. This time delay is calculated based on the following formula: [fo_TW_Time Delay Cable, 2, en_US] where: tc Calculated time delay of the trigger signal through the wiring lT Length of the cable between the current or voltage transformer and the device. Depending on the transformer, the parameter is Cable length CT or Cable length VT. 2.6.4 Device Structure 2.6 Application and Setting Notes SIPROTEC, Travelling Wave Recorder, Device Manual 19 E50417-X0040-C000-A2, Edition 03.2025 c Speed of light velocity factor Relative propagation velocity of the wave on the cable in relation to the speed of light c. Current transformer: Parameter Velocity factor cable CT Voltage transformer: Parameter Velocity factor cable VT Parameter: Cable length CT • Default setting Cable length CT = 50 m Use parameter Cable length CT to set the length of the cable between the current transformer and the device. Set a value from 1 m to 500 m, according to the cable used. Parameter: Velocity factor cable CT • Default setting Velocity factor cable CT = 67.0 % Use parameter Velocity factor cable CT to set the relative propagation velocity of the traveling wave in the cable between the current transformer and the device. The value is specified as a percentage in relation to the speed of light. Set a value from 20 % to 100 %. If you do not know the value of the cable, use the default value of 67 %. Parameter: Cable length VT • Default setting Cable length VT = 50 m Use parameter Cable length VT to set the length of the cable between the voltage transformer and the device. Set a value from 1 m to 500 m, according to the cable used. Parameter: Velocity factor cable VT • Default setting Velocity factor cable VT = 67.0 % Use parameter Velocity factor cable VT to set the relative propagation velocity of the traveling wave in the cable between the voltage transformer and the device. The value is specified as a percentage in relation to the speed of light. Set a value from 20 % to 100 %. If you do not know the value of the cable, use the default value of 67 %. Resolution and Trigger Thresholds ii NOTE All of the following setting values relate to the secondary parameters at the respective transformer. Adjust the resolution of the current and voltage channels to the size of the high-frequency signal shares. The recommended setting values can be calculated from the line and transformer data using the following formulas. Larger values do not result in any improvement, as the resolution of the signal in the evaluated frequency range is smaller. ii NOTE The fundamental component of the current and voltage signals is filtered out and is therefore not visible in the record. Therefore, the fundamental component does not have to be taken into account when setting the resolution and the trigger thresholds. 2.6.5 Device Structure 2.6 Application and Setting Notes 20 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 The trigger thresholds specify the current or voltage level from which recording of a record starts. If the trigger threshold in one of the channels is exceeded, a record is recorded. If the setting values are too small, unnecessary records will be generated even when there is no event in the power system. On the other hand, if the setting values are too high, no record will be generated when there is an event. Siemens recommends the following settings: • For the current channels: 20 % of the maximum recording level • For the voltage channels: 10 % of the maximum recording level Parameter: Full scale current • Default setting Full scale current = 2 A Use parameter Full scale current to set the scale end value for the measurement at the secondary current transformer inputs. This value specifies the maximum current value that can be recorded. Larger values are clipped. Set a value from 0.280 A to 28 A. The setting value can be calculated from the maximum possible voltage pulse on the line: [fo_Max voltage impulse, 1, en_US] This results in the maximum primary current pulse: [fo_TW_Max current impulse, 1, en_US] When calculating the setting value, take parameter Full scale current into account as well as the current ratio and the attenuation factor Fatt. The setting value for parameter Full scale current can be determined as follows: [fo_TW_Full Scale Current, 1, en_US] where: Fatt Attenuation factor of the primary current of the current transformer Vrated, prim Rated Rated primary voltage (Parameter Rated primary voltage) ZW Characteristic impedance of the line Irated, prim Rated primary current (Parameter Rated primary current) Irated, sec Rated secondary current (Parameter Rated secondary current) The current transformer attenuates the high-frequency signal shares in the range from 10 kHz to 2 MHz more than the fundamental component of 50 Hz or 60 Hz. The attenuation factor Fatt specifies the transmission ratio for high-frequency signal shares in comparison to the fundamental component share. ii NOTE The attenuation factor is not specified by the transformer manufacturer. If the attenuation factor of the primary current is not known, Siemens recommends using an attenuation factor of 1.0 for the calculation. The characteristic impedance ZW is independent of the length of the line. It is determined by the design, materials, and insulation of the line. For overhead lines, the characteristic impedance ZW is 200 Ω to 400 Ω, for underground cables, it is 10 Ω to 40 Ω. Device Structure 2.6 Application and Setting Notes SIPROTEC, Travelling Wave Recorder, Device Manual 21 E50417-X0040-C000-A2, Edition 03.2025 If the characteristic impedance of the line ZW is not known, it can be calculated approximately using the following formula: [fo_TW_Characteristical impedance, 1, en_US] where: L' Inductance per unit length of the line. Calculate this value using the positive-sequence impedance Z1 of the line. C' Capacitance per unit length of the line. This value is also called the capacitance per unit length of the line CB, is identical to the capacitance of the positive-sequence system C1, and can be found in the technical data of the line. Example: For the following system, calculate the setting value for parameter Full scale current as follows: Size Value Rated primary voltage Vrated, prim 380 kV Rated secondary voltage Vrated, sec 100 V Rated primary current Irated, prim 800 A Rated secondary current Irated, sec 1 A Rated frequency frated 50 Hz Positive-sequence impedance R'1 + j X'1 (0.027 + j0.307) Ω Positive-sequence impedance capacity C'1 11.8 nF/km Attenuation factor Fatt of the current transformer Unknown In the 1st step, the characteristic impedance of the line is calculated. The inductance per unit length is calculated from the positive-sequence impedance of the line: [fo_TW_Example_Induct_L1, 1, en_US] The characteristic impedance is then: [fo_TW_Characteristical impedance Example, 1, en_US] The attenuation factor Fatt is unknown, therefore the calculation is carried out with the value 1.0: [fo_TW_Full Scale Current Example, 1, en_US] Table 2-1 shows the characteristic impedance ZW for some overhead lines, and the possible setting value for parameter Full scale current. The secondary setting value was calculated for a rated primary current of 600 A. Device Structure 2.6 Application and Setting Notes 22 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Table 2-1 Characteristic impedance ZW and possible setting value for parameter Full scale current for some selected overhead lines Voltage level Line Characteristic impedance ZW Primary setting valueSecondary setting value (INsec = 1 A, INprim = 600 A) 110 kV 1x Al/St 435 mm2 353.21 Ω 254.28 A 0.42 A 220 kV 1x Al/St. 435 mm2 376.28 Ω 477.38 A 0.8 A 220 kV 2x Al/St. 265 mm2 280.69 Ω 639.96 A 1.07 A 380 kV 2x Al/St 560 mm2 287.78 Ω 1087.16 A 1.8 A 380 kV 4x Al/St 265 mm2 238.06 Ω 1303.32 A 2.17 A 380 kV 4x Al/St 435 mm2 234.28 Ω 1324.33 A 2.21 A The following table shows how different settings of parameter Full scale current affect the measuring results: Setting value for parameter Full scale current Possible impacts on the measuring results Too low • Current curves that are too large are clipped. • If the current curves are clipped, the edges appear very steep. The tip of the edge is no longer included in the signal. According to the formula • No clipping of the current curves • Resolution is used optimally • Edges are clearly identifiable. Too high • No clipping of the current curves • Resolution is not fully used • If the resolution is not adequate, the edges cannot be clearly identified. Parameter: Trigger level current • Default setting Trigger level current = 0.400 A Use parameter Trigger level current to set the trigger threshold for measured values at the current transformer inputs. If the threshold value is exceeded at one of the measurement inputs, a recording starts. The setting value relates to the secondary current of the instrument transformer and is specified in Amperes. The setting range for this parameter is dependent on the setting value of parameter Full scale current. The limits are calculated as follows: • Bottom limit: 1 % of the setting value Full scale current • Top limit: 99 % of the setting value Full scale current Siemens recommends setting the value to 20 % of the maximum current value Full scale current. Example: The setting value for parameter Full scale current was calculated as 1.8 A. This results in the following limiting values for parameter Trigger level current: • Bottom limit: 0.018 A • Top limit: 1.782 A • Recommended setting value: 0.360 A Device Structure 2.6 Application and Setting Notes SIPROTEC, Travelling Wave Recorder, Device Manual 23 E50417-X0040-C000-A2, Edition 03.2025 Parameter: Full scale voltage • Default setting Full scale voltage = 25,000 V Use parameter Full scale voltage to set the scale end value for measurement at the secondary voltage transformer inputs. This value specifies the maximum voltage value that can be recorded. Larger values are clipped. Set a value from 0.235 to 235 000 V. The value can be calculated from the maximum possible voltage pulse on the line: [fo_Max voltage impulse, 1, en_US] The voltage transformer attenuates the high-frequency signal shares in the range from 10 kHz to 2 MHz more than the fundamental component of 50 Hz or 60 Hz. The attenuation factor Fatt,V specifies the transmission ratio for high-frequency signal transmission in comparison to the fundamental component share. ii NOTE If the attenuation factor of the primary voltage of the voltage transformer is not known, Siemens recom- mends using an attenuation factor of 1.0 for the calculation. The correct value for parameter Full scale voltage can be determined as follows: [fo_TW_Full Scale Voltage, 1, en_US] where: Fatt,V Attenuation factor of the primary voltage of the voltage transformer Vrated, sec Rated secondary voltage The following table shows possible impacts of the setting value on the measuring results: Setting value for parameter Full scale voltage Possible impacts on the measuring results Too low • Voltage curves that are too large are clipped. • If the voltage curves are clipped, the edges appear very steep. The tip of the edge is no longer included in the signal. According to the formula • No clipping of the voltage curves • Resolution is used optimally • Edges are clearly identifiable. Too high • No clipping of the voltage curves • Resolution is not fully used • If the resolution is not adequate, the edges cannot be clearly identified. Device Structure 2.6 Application and Setting Notes 24 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 The following figures show examples of a voltage curve after a traveling wave test signal with different settings of parameter Full scale voltage: [sc_faultrecording_full_scale_voltage_too_small, 1, --_--] Figure 2-4 Maximum voltage value set too low: The voltage curve is clipped. [sc_faultrecording_full_scale_voltage_OK, 1, --_--] Figure 2-5 Maximum voltage value set correctly: The voltage curve is displayed properly. [sc_faultrecording_full_scale_voltage_too_large, 1, --_--] Figure 2-6 Maximum voltage value set too high: The voltage curve is superimposed with noise. Parameter: Trigger level voltage • Default setting = 2,500 V The default setting is dependent on the setting value of parameter Full Scale Voltage. Use parameter Trigger level voltage to set the trigger threshold for measured values at the voltage transformer inputs. If the threshold value is exceeded at one of the measurement inputs, a recording starts. The setting value relates to the voltage on the secondary circuit of the instrument transformer and is specified in volts. The setting range and the default setting for this parameter are dependent on the setting value of parameter Full scale voltage: • Bottom limit: 1 % of the setting value Full scale voltage • Top limit: 99 % of the setting value Full scale voltage Siemens recommends setting the value to 10 % of the maximum voltage value Full scale voltage. If you have not connected the voltage transformer, set the maximum possible value. Device Structure 2.6 Application and Setting Notes SIPROTEC, Travelling Wave Recorder, Device Manual 25 E50417-X0040-C000-A2, Edition 03.2025 Example: The setting value for parameter Full scale voltage was calculated as 25.0 V. This results in the following limiting values result for parameter Trigger level voltage: • Bottom limit: 0.25 V • Top limit: 24.75 V • Recommended setting value: 2.50 V Recording Events The device continuously saves the current and voltage signals, so data is available even before the start of the record if there is a trigger event. The maximum length of a traveling wave record is 50 ms. Adjust the pre-trigger time and post-trigger time for a trigger event using the following parameters. Parameter: Pre-trigger length • Default setting: Pre-trigger length = 2.00 ms With parameter Pre-trigger length, set the pre-trigger time for recording of an event. Set a value from 0.1 ms to 25.00 ms. Parameter: Post-trigger length • Default setting Post-trigger length = 3.00 ms With parameter Post-trigger length, set the record time after the trigger. Set a value from 0.1 ms to 25.00 ms. To record several reflections of the fault location as well as of the opposite line end, Siemens recommends setting the value according to the following equation: [fo_Post-Trigger Time, 1, --_--] where: l Line length c Speed of light Example: The following image shows a traveling wave record. The Pre-trigger length was set to 2 ms, and the Post-trigger length was set to 3 ms. 2.6.6 Device Structure 2.6 Application and Setting Notes 26 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [sc_faultrecording_pre_post_trigger_time, 1, --_--] Figure 2-7 Traveling Waves Record with Pre-trigger Length and Post-trigger Length Setting the GNSS Module For time synchronization, the device has a GNSS module (Global Navigation Satellite System). This can receive signals from GPS and GLONASS satellites. Before using the device, exact positioning of the installed antenna is required. For how to start positioning with the Travelling Wave Explorer program, refer to 3.7.4.1 Initiating Positioning. The antenna is connected to the device with a cable. Due to the cable, the GNSS signals arrive at the device with a delay. This time delay is compensated for during calculation of the time stamp. To do this, enter the length ofthe cable and the propagation velocity on this cable: Parameter: Antenna cable length • Default setting: Antenna cable length = 20 m Use parameter Antenna cable length to specify the length of the antenna cable to the device. Set a value from 1 m to 500 m. The default value corresponds to the supplied antenna cable. Only change the setting value if you are using a different cable. Parameter: Velocity factor for antenna cable • Default setting: Velocity factor for antenna cable = 80.0 % Use parameter Velocity factor for antenna cable to specify the relative propagation velocity of the GNSS signal on the antenna cable in relation to the speed of light. Set a value from 20.0 % to 100.0 %. The 2.6.7 Device Structure 2.6 Application and Setting Notes SIPROTEC, Travelling Wave Recorder, Device Manual 27 E50417-X0040-C000-A2, Edition 03.2025 default value corresponds to the supplied antenna cable. Only change the setting value if you are using a different cable. If you do not know the relative propagation velocity of a signal on your cable, use the default value of 80 %. Configuration of the Ethernet Interface The Ethernet interface is used to operate the device with the Travelling Wave Explorer program: • Setting parameters • Downloading records • Initiating a test record • Updating the device firmware Using the following parameters from the IP Configuration group, you can configure the Ethernet interface: Parameter: IP address • Default setting: IP address = 172.16.60.60 Use parameter IP address to set the Ethernet IP communication interface of the device. Every device must be assigned a unique IP address. The IP address to be set depends on your network configuration. You can set any valid IPv4 address that does not cause conflicts with other IP addresses in the network. IP addresses have the format x.y.y.x. The components of the IP address can take the following values: Component of the IP address Range of values X 1 to 254 Y 0 to 254 ii NOTE In the delivery status, the IP address 172.16.60.60 is saved in the device. The device can initially only be accessed and configured via this address. Parameter: Subnet mask • Default setting: Subnet mask=255.255.255.0 Use parameter Subnet mask to define a subnetwork mask. With the subnetwork mask, the recipient of data packets can distinguish sections of the network ID and the host ID in the IP address. The subnetwork mask is a 32-bit value. Parameter: Default gateway • Default setting: Default gateway=172.16.60.65 Use parameter Default gateway to set the IP address of the gateway. Parameter: MTU frame size • Default setting: MTU frame size=1500 bytes Use parameter MTU frame size to specify the maximum transmission size for packages in the data network. Set a value from 576 bytes to 1500 bytes. Siemens recommends using the default setting. Only set a smaller value if your network requires this. 2.6.8 Device Structure 2.6 Application and Setting Notes 28 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Setting Notes for Fault Location Using the Travelling Wave Explorer program, you can perform double-end fault location. To do this, the matching records from both ends of the line and some line data that you enter in the Travelling Wave Explorer program are required. For how to enter the line data, see Editing the Line Properties, Page 47. Line Settings - Length Parameter Specify the line length in km. Values from 1 km to 1000 km are possible. Line Settings - Velocity Parameter Specify the propagation velocity of the wave in km/s. If the propagation velocity is not known, you can calculate the setting value based on the line data, using the following formula: [fo_TW_Propagation_Speed, 1, --_--] where: L' Inductance per unit length of the line. Calculate this value using the positive-sequence impedance Z1 of the line. C' Capacitance per unit length of the line. This value is also called the capacitance per unit length of the line CB, is identical to the capacitance of the positive-sequence system C1, and can be found in the technical data of the line. The following table shows the propagation velocity for some overhead lines. Table 2-2 Propagation Velocity of the Traveling Wave for some Selected Overhead Lines Voltage level Line Propagation velocity v 110 kV 1x Al/St. 435 mm2 292 780 km/s 220 kV 1x Al/St. 435 mm2 293 331 km/s 220 kV 2x Al/St. 265 mm2 294 921 km/s 380 kV 2x Al/St. 560 mm2 294 486 km/s 380 kV 4x Al/St. 435 mm2 295 591 km/s 380 kV 4x Al/St. 265 mm2 295 609 km/s Evaluating a Traveling Wave Record with SIGRA In addition to automatic fault location with the Travelling Wave Explorer program, manual single-end or double-end fault location is also possible. The SIGRA program must be installed for the following steps. Double-End Fault Location ² Using the Travelling Wave Explorer program, download the records belonging to the fault. You can recognize the associated records by the time stamps on both devices. The time stamps of the associated records differ by just a few microseconds. To find out how to download records, see 3.8.2 Downloading the Traveling Wave Records Individually. ² Copy the associated records from both line ends into a new folder on your computer. ² Start the program SIGRA. 2.6.9 2.7 Device Structure 2.7 Evaluating a Traveling Wave Record with SIGRA SIPROTEC, Travelling Wave Recorder, Device Manual 29 E50417-X0040-C000-A2, Edition 03.2025 ² Open the record for the first side of the line via menu option File / Open. - or - ² Open the first record by double-clicking the CFG file. The record is displayed. For fault location, perform the following steps: ² Switch to the instantaneous values view. To do this, click the Instantaneous values button. ² To select all diagrams in the illustration, use the keyboard shortcut Ctrl + A. ² Right-click in one of the displayed diagrams and select Optimize in the menu. The diagrams are then scaled so that the full current and voltage curves are shown. The first record is displayed in SIGRA. [sc_SIGRA_Record_1, 1, en_US] Figure 2-8 Record of a 1-phase short circuit BG on a 400 kV Line Now load the 2nd record from the other end of the line: ² In SIGRA, select Paste / Fault record in the menu. ² In the file selection dialog, select the 2nd record. You can see both records one on top of the other in SIGRA. The records are automatically synchronized. You can see the time difference between the 2 trigger events. All evaluation options of SIGRA are available to you. For double-end fault location, it is helpful to display the current or voltage curves of both sides of the line in one diagram: ² In SIGRA, right-click in the last diagram of the record. ² Select New. ² Right-click in the newly created diagram and select Assign signals. ² Select the signals that are to be displayed together in the new diagram. For a fault BG, this could be signals K1:IL2 B and K2:IL2 B. Device Structure 2.7 Evaluating a Traveling Wave Record with SIGRA 30 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 The signals for both ends of the lines are shown in one diagram. Use the 2 cursors to determine the fault location. ² Slide cursor 2 (blue) to the first edge of the signal from the 1st device (node K1). Select either the start or the top of the edge. ² Slide cursor 1 (orange) to the first edge of the signal from the 2nd device (node K2). In SIGRA, the time difference between the two marks is displayed in the top left in the C2-C1 field. [sc_delta_t_2side_flt_loc, 1, en_US] Figure 2-9 Determining the time difference between the edges on both ends of the line ² Determine the fault location with the measured time difference according to the following formula: [fo_TW_FaultLocation_2side_formula, 1, en_US] where: x Distance to the fault location in km l Length of the line in km v Propagation velocity of the traveling wave in km/s Δt Time difference between the edges in s Example:There is a line with the following data: Size Value Length of line l 117 km Voltage level: 400 kV Propagation velocity v 294 486 km/s With SIGRA, a time difference of -0.24796 ms was measured. The distance to the fault location is: [fo_TW_Example_2-Side, 1, --_--] Device Structure 2.7 Evaluating a Traveling Wave Record with SIGRA SIPROTEC, Travelling Wave Recorder, Device Manual 31 E50417-X0040-C000-A2, Edition 03.2025 Single-End Fault Location For single-end fault-location, the time difference between the first edge and the reflection from the fault location is measured. The following figure shows the possible reflections of the traveling wave: [dw_TWFL_Reflections, 1, --_--] Figure 2-10 Reflections of the traveling wave tA1 Time stamp of the 1st edge of the traveling wave tB1 Time stamp of the 1st edge of the traveling wave at the opposite end tA2 Time stamp of the 2nd edge of the traveling wave. 1st reflection from the fault location tA3 Time stamp of the 3rd edge of the traveling wave. 2nd reflection from the fault location tA4 Time stamp of the 4th edge of the traveling wave. 1st reflection from the opposite end The traveling wave propagates from the fault location. At time tA1, the wave reaches measuring point A for the first time. The wave is reflected at the line ends and at the fault location. At time tA2, the 1st reflection reaches measuring point A. The distance between the fault location and measuring point A can be determined from the time difference Δt = tA2-tA1. If you know which edge is a reflection of the fault, then reliable single-end fault location is possible. If the record contains other reflections of the fault location, then the time difference between the edges of the reflections is the same. Reflections can also occur at other places on the line. Possible reflections are: • The busbar at the opposite end • Branch points on the line • Places where the geometry of the line changes • Coupling points between an overhead line and a cable section Therefore, single-end fault location is not always clear. If there are faults near the opposite end of the line, several reflections will be superimposed. Clear fault location is not possible in these cases. To find the correct fault location out of the possible values, compare the values with the result of the fault locator of a protection device. Determine the distance to the fault location as follows: ² Using the Travelling Wave Explorer program, download the record belonging to the fault. ² Start the program SIGRA. ² Open the record via menu item File / Open. - or - Device Structure 2.7 Evaluating a Traveling Wave Record with SIGRA 32 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 ² Open the record by double-clicking the CFG file. The record is displayed. For fault location, perform the following steps: ² Switch to the instantaneous values view. To do this, click the Instantaneous values button. ² To select all diagrams in the illustration, use the keyboard shortcut Ctrl + A. ² Right-click in one of the displayed diagrams and select Optimize in the menu. The record is displayed in SIGRA. ² Search for a current or voltage signal in which the 1st and 2nd edge of the traveling wave can be seen. Other edges enable you to check the result. ² Zoom in on the record so that the edges are clearly visible. ² Slide the 1st cursor (orange) to the start of the 1st edge. ² Slide the 2nd cursor (blue) to the start of the 2nd edge. In SIGRA the time difference between the two marks is displayed in the top left in the C2-C1 field. [sc_delta_t_1-side, 1, --_--] Figure 2-11 Measuring the time difference between 2 edges for single-end fault location ² Calculate the distance to the fault location using the following formula: [fo_TW_FaultLocation_1side, 1, --_--] Example: In the record, a time difference of 0.06793 ms was measured between the two edges on current signal IC. The distance to the fault location is: [fo_Example_1-Side, 1, --_--] This result can be checked with the 3rd edge. ² Slide the two cursors in SIGRA to the 2nd edge (blue) and the 3rd edge (black). ² Measure the time difference between the two edges as previously described. If the time difference is the same as the first measured time difference, then the fault location is correct. In the example, the 2nd time difference was measured as 0.06923 ms. This value is almost identical to the difference between the first two edges. Device Structure 2.7 Evaluating a Traveling Wave Record with SIGRA SIPROTEC, Travelling Wave Recorder, Device Manual 33 E50417-X0040-C000-A2, Edition 03.2025 Monitoring Functions To ensure safe operation and proper functioning of the device, various monitoring activities are performed during operation. If LED 2 Error lights up red, there is a serious error. Monitoring the SD Card The SD card is monitored continuously during operation. If LED 2 Error lights up or flashes red, first check for one of the following faults. • LED 2 Error flashes after the device is switched on. – The SD card is not inserted. The device cannot be operated without an SD card. Isolate the device from the supply voltage and insert the SD card. • LED 2 Error is lit up. The following errors are possible: – The SD card is defective. Switch off the device and replace the SD card. – The SD card is write-protected. Switch off the device and remove the SD card. The switch for write protection is located on the side of the SD card and is labeled with Lock. Slide the switch to the other end. Insert the SD card again and switch on the device. • If LED 2 Error lights up and LED 3 SD card status flashes, the SD card is full. The SD card must be replaced. LED 3 SD card status shows the fill level of the SD card: LED 3 SD card status Occupied storage capacity off 80 % of the storage capacity of the SD card. Delete records that are no longer required or replace the SD card. Self Monitoring During operation, the following monitoring functions are permanently active: • Monitoring of the program sequence (Watchdog) • Monitoring of the primary storage • Monitoring of the consistency of parameters (only after the parameters have been changed) If LED 2 Error lights up and checking the SD card as well as restarting the device does not remedy the fault, contact the Customer Support Center. Dimensions [dw_device dimension front view 7SE20, 1, en_US] 2.8 2.9 Device Structure 2.8 Monitoring Functions 34 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 [dw_device dimension top view 7SE20, 1, en_US] Device Connections Current Terminal I Note the following when connecting to the current terminal of the device: Cable cross-section AWG 12 (2.5 mm2 to 4 mm2) When using terminal lugs AWG 12–10 (2.7 mm2 to 6.6 mm2) Stripped length (for use without bootlace ferrule) 10 mm or 11 mm; Use solid copper conductors only Permissible tightening torque at clamping screw Max. 2.7 Nm Position on the device See Rear View, Page 73 [sc_current_terminal_7SE20, 1, --_--] Figure 2-12 Current terminal I, 8-pole Table 2-3 Connector pin-out of current terminal I Terminal point 1 2 3 4 5 6 7 8 Signal designation I1_N I1_P I2_N I2_P I3_N I3_P I4_N I4_P 2.10 Device Structure 2.10 Device Connections SIPROTEC, Travelling Wave Recorder, Device Manual 35 E50417-X0040-C000-A2, Edition 03.2025 Voltage Terminal V Note the following when connecting to the voltage terminal of the device: Cable cross-section AWG 20–14 (0.5 mm2 to 2.5 mm2) When using terminal lugs AWG 16–14 (1.0 mm2 to 2.5 mm2) Stripped length (for use without bootlace ferrule) 9 mm or 10 mm; Use solid copper conduc- tors only Permissible tightening torque at clamping screw Max. 1.8 Nm Position on the device See Rear View, Page 73 [sc_voltage_terminal_7SE20, 1, --_--] Figure 2-13 Voltage terminal V, 12-pole Table 2-4± 2 mm amplitude (vertical axes) 8 Hz to 35 Hz: 5 m/s2 acceleration (horizontal axes) 8 Hz to 35 Hz: 2.5 m/s2 acceleration (vertical axis) Frequency sweep 1 octave/min 1 cycle in 3 axes perpendicular to one another Vibration and shock stress during transport Standards Description Vibration Test (sinusoidal) IEC 60068-2-6 Sinusoidal 2 Hz to 9 Hz: ± 3.5 mm amplitude 9 Hz to 200 Hz: 10 m/s2 acceleration 200 Hz to 500 Hz: 15 m/s2 acceleration Frequency sweep 1 octave/min 20 cycles in 3 axes perpendicular to one another Shock Test IEC 60068-2-27 Semi-sinusoidal Acceleration 100 m/s2 Duration 11 ms 3 shocks each in both directions of the 3 axes Technical data SIPROTEC, Travelling Wave Recorder, Device Manual 71 E50417-X0040-C000-A2, Edition 03.2025 Appendix A.1 Figures 73 A.2 Meaning of the LEDs 74 A.3 Ordering Information and Accessories 74 A.4 Connection Diagrams 75 A 72 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Figures Front View [sc_Front_view_7SE20, 1, en_US] Rear View [sc_Rückansicht, 1, en_US] Top View [sc_Draufsicht Montage, 1, --_--] A.1 Appendix A.1 Figures SIPROTEC, Travelling Wave Recorder, Device Manual 73 E50417-X0040-C000-A2, Edition 03.2025 Meaning of the LEDs LED Name LED Status Meaning 1 Run off There is no supply voltage at the device. on There is a supply voltage at the device. 2 Error off The device is ready for operation. on The LED lights up red in the following situations: • The device is in system startup (max. 15 s). • The device is in the fault condition. • The SD card was removed. • The SD card is write-protected. flashes No SD card was inserted during device system startup. 3 SD card status LED – SD card status provides information about the fill level of the SD card. off At least 50 % of the storage capacity of the SD card is available. on 50 % to 80 % of the storage capacity of the SD card is filled with fault records. flashes More than 80 % of the storage capacity of the SD card is filled with fault records. The SD card must be replaced. 4 SD card read off No read access to the SD card on Read access to the SD card is running 5 SD card write off No write access to the SD card on Write access to the SD card is running 6 Trigger active off No trigger is currently active on A trigger is active, a fault record is being written to the SD card. 7 GNSS locked off Positioning has not yet been performed. No position is saved in the device. If the LED goes out during operation, the quality of the GNSS signal has deteriorated. flashes Positioning is in progress. Time synchronization is possible. on Positioning has been completed and the position data is saved in the device. The GNSS signal is available. 8 Sync – 1 PPS off The device is not yet synchronized or synchronization is no longer possible due to the loss of the GNSS signal. flashes The LED flashing in a second rhythm indicates the PPS signal. Ordering Information and Accessories Order number Description Order number 1 2 3 4 5 6 7 8 9 10 11 12 Travelling Wave Recorder 7SE20, antenna incl. 20 m antenna cable 7 S E 2 0 1 1 – 1 A A 1 2 Accessories Description Order number Antenna cable extension, 20 m C53207-A430-D280-1 SDHC memory card for 7KE85 P1Z2530 A.2 A.3 Appendix A.2 Meaning of the LEDs 74 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Connection Diagrams The following figures show the respective typical types of connection for current and voltage measurements. Connection of the V4 transformer is optional. [dw_type-of-connection-current_7SE20, 1, en_US] Figure A-1 Connection for current measurement [dw_type-of-connection-voltage_7SE20, 1, en_US] Figure A-2 Connection for voltage measurement A.4 Appendix A.4 Connection Diagrams SIPROTEC, Travelling Wave Recorder, Device Manual 75 E50417-X0040-C000-A2, Edition 03.2025 Glossary COMTRADE COMTRADE is a file format for storing oscillography and status data associated with transient faults in the electricity-supply system. GLONASS Global satellite navigation system, Russian system GNSS Global Navigation Satellite System GPS Global Positioning System PPS Pulse Per Second SIGRA SIGRA is licensed software for the evaluation of fault records. SIOS Siemens Industry Online Support TCP Transmission Control Protocol UDP User Datagram Protocol VPN Virtual Private Network 76 SIPROTEC, Travelling Wave Recorder, Device Manual E50417-X0040-C000-A2, Edition 03.2025 Preface Table of Contents 1 Safety Notes 2 Device Structure 2.1 Scope and Key Features of the Device 2.2 Traveling Waves 2.3 Recording Traveling Waves 2.4 Positioning of the Antenna 2.5 LED Assignment and Device Status 2.6 Application and Setting Notes 2.6.1 Overview 2.6.2 Station and Device Name 2.6.3 Transformer Data 2.6.4 Connection between the Transformer and the Device 2.6.5 Resolution and Trigger Thresholds 2.6.6 Recording Events 2.6.7 Setting the GNSS Module 2.6.8 Configuration of the Ethernet Interface 2.6.9 Setting Notes for Fault Location 2.7 Evaluating a Traveling Wave Record with SIGRA 2.8 Monitoring Functions 2.9 Dimensions 2.10 Device Connections 3 Travelling Wave Explorer 3.1 Elements in the Travelling Wave Explorer 3.2 Installation and Uninstallation 3.3 Project Management 3.3.1 Creating a New Project 3.3.2 Opening an Existing Project 3.3.3 Editing a Project 3.3.4 Changing Project Settings 3.4 System Management 3.4.1 Editing a System 3.5 Station Management 3.5.1 Editing a Station 3.6 Line Management 3.6.1 Editing a Line 3.7 Device Management 3.7.1 Editing a Device 3.7.2 Restart the device 3.7.3 Device Information 3.7.3.1 Requesting Status Information 3.7.3.2 Requesting the Setting Values from the Device 3.7.3.3 Editing Setting Values 3.7.3.4 Sending Changed Setting Values to the Device 3.7.3.5 Changing the IP Address 3.7.4 Device Position 3.7.4.1 Initiating Positioning 3.7.4.2 Monitoring Positioning 3.7.5 Update firmware 3.8 Records 3.8.1 Refreshing the Record Overview 3.8.2 Downloading the Traveling Wave Records Individually 3.8.3 Automatically Downloading Traveling Wave Records 3.8.4 Initiating a Test Record 3.8.5 Displaying the File Storage Location of Records 3.8.6 Opening a Record in SIGRA 3.9 Calculating the Fault Location 4 Assembly and Commissioning 4.1 Unpacking/Repacking a Device 4.2 Device Assembly 4.3 Antenna Assembly 4.4 Commissioning 5 Maintenance and Repair 5.1 Maintenance 5.2 Repair 5.3 Environmental protection hints 6 Packing, Storage, and Transport 7 Technical data A Appendix A.1 Figures A.2 Meaning of the LEDs A.3 Ordering Information and Accessories A.4 Connection Diagrams Glossary
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