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CT Bus wire supervision

CT Bus wire supervision

CT Bus wire supervision

(OP)
Could anyone clarify the following.

Here we are having the situation that we have to provide Numerical Relays (IEC 61850) for CT Bus wire supervision function. Earlier we are using MVTP/RAEDK relays (Electromagnetic type) for the same application which is nothing but Under/Over voltage relays. Hence please confirm my understanding that we can use any Numerical Under/Over voltage relays for the same application.

RE: CT Bus wire supervision

What is CT Bus wire supervision?

RE: CT Bus wire supervision

(OP)
Its nothing but ct supervision which we are using generally in High impedance busbar protection system

RE: CT Bus wire supervision

I've never tried what you are suggesting but it is possible I guess - have you found one with a suitable setting range ?
For numerical BBP with iec61850, we use a low impedance relay. Most of the one we have used (B90, P746, SEL487B, REB670) have a supervision stage that blocks the diff protection and raise an alarm like the old ct bus wire supervision relays used to do.

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