html{display:none} No Test Set? No Problem—Event Playback Simplifies Testing of Ultra-High-Speed Relays | Schweitzer Engineering Laboratories
Recorded Webinar

No Test Set? No Problem—Event Playback Simplifies Testing of Ultra-High-Speed Relays

Date held: April 14, 2021
Duration: 1 hour

The built-in event playback feature available in the SEL-T400L Time-Domain Line Protection and the SEL-T401 Ultra-High-Speed Line Relay provides new opportunities for testing ultra-high-speed (UHS) relays. With it, you can test the complete suite of relay features, including traveling-wave-based protection and fault-locating functions, without the use of a test set to inject simulated traveling-wave pulses.

Event playback substitutes actual voltages and currents at the relay terminals with the contents of an uploaded test file. You can use the event playback feature to perform bench testing and commissioning of a single UHS relay or a scheme of UHS relays (i.e., end-to-end testing) to validate relay settings and relay performance without secondary injection of currents and voltages.

During this webinar, you will:

  • Learn how to perform event playback testing of a relay’s protection and fault-locating functions—including traveling-wave differential schemes, single- and double-ended traveling-wave fault locating, and the line monitor function—without a physical test set by using transient records and tools in acSELerator QuickSet SEL-5030 Software.
  • Discover how event playback simplifies relay testing and aids in the analysis of relay performance.
  • Learn about the requirements of IEEE C37.111 COMTRADE transient records for event playback.
  • Watch a demonstration of event playback testing, which includes converting transient records to the necessary format by using the Playback File Conversion Utility and controlling playback by using the Event Playback Dashboard.
  • Hear about various use cases and benefits of this tool, such as performing “what if” testing with relay settings.
  • Learn how to analyze the results of playback testing by using event records captured during the test.

Learn From the Experts


Richard D. Kirby

Senior Product Sales Manager

Greg Smelich

Development Lead Engineer