I am "old school" when it comes to testing CT's. I like hands on testing of ratio error and saturation tests, etc. All these new automatic CT testers make me question how the test is done and what can I expect from the results? I expect the automatic tester to do the tests in accordance with the...
1. Do not do an insulation resistance (hy pot) test on microprocessor based relays.
2. What type of SEL relays do you have? I assume they are distribution and motor protection type relays. To take the mystry and misery out of testing the SEL relays you might want to look into a fully automated...
It has been a long time since I tested OCR's (about 20 years ago). I went back and looked it up in an old McGraw Edison book. They say it should take approximately 1 minute per operation to reset. Therefore, after one shot it should take 1 minute to reset. If you went two shots it should take 2...
Sorry to hear about your disappointing review of the MPRT from Megger. I do not know what you got to see, but the MPRT comes with the AVTS V2.0 software. The software includes test files for about 57 different relays by 5 different relay manufacturers. Most of those test files are for...
