These videos will show you how to create and/or modify timing tests that you can apply to any element with an inverse time.
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Click Here if You Use an Omicron Test-Set
Click Here if You Use a Manta Test-Set
Click Here if You Use RTS Software to Perform Your Tests
This video will show you how to perform a timing test using the Dynamic Tests / Dynamic Operations /State Sequencer test:
This video will show you how to perform a phase-phase inverse timing test using the RTS Steady State / General Timing / Current, Multipoint Test and the RTS Steady State / General Fault / Single Fault Test:
This video will show you how to perform a phase-phase inverse timing test using the RTS Steady State / General Timing / Current / Curve, Multipoint Test:
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Would it be possible to get copies of the plans you used in these training videos for the Omicron? I would like to go through them and see how you made them which is a bit hard to do from watching the videos
It doesn’t look like I saved this specific test plan, but you should be able to see something similar in the “51GT 2X” test in this file.
Download the file
Hope it helps.
To check my understanding of why the elements tripped to soon in the Omicron video at 8:00, what I think happened that caused B and C to operate too quickly is that the relay has an “energy bucket,” if you will, that fills up as the A phase fault is introduced and then gradually emptied back out. By lengthening the time between the tests, this allows the relay’s energy bucket to empty out, and the times for phases B and C align with the expected value. Is this accurate?
Your analogy could be used to describe what’s happening, but you are really describing a overload element and I would try to keep the two separate in my head because the “energy bucket” for an inverse element with electro-mechanical reset turned on will empty much faster than an overload’s “energy bucket” would.
The electro-mechanical reset setting is on inside the relay, so the digital relay is pretending that there is a disc inside the relay that must move back to the reset position after the current falls below the pickup setting, like you see in this video (https://vimeo.com/728290394) of a 2x timing test. The relay operated in 6 seconds, but the relay disc isn’t fully reset until 16 seconds after the trip. If you try to start a new timing test in less than 16 seconds after the trip, the virtual disc inside the relay will be closer to the trip position and trip faster than expected.