OLTC+AVR Problems
OLTC+AVR Problems
(OP)
We have an OLTC with Alstom MVGC as the AVR. Recently, we have been going down a lot on out of step. This is because we have a parrallel connected transformers with master-follower configuration. The problem only occurs between taps 4 and 5. The master moves to 5 but the follower stays at 4. What are the things to look out for?






RE: OLTC+AVR Problems
RE: OLTC+AVR Problems
RE: OLTC+AVR Problems
Would it be a wiring problem?
RE: OLTC+AVR Problems
RE: OLTC+AVR Problems
Which method of master/follower are you using? We had one location where the follower command was driven by the sealed in raise contact on the master. Once in a while, the follower would finish tapping a fraction of a second faster than the master, and would start a second tap change just before the master finished.