Breaker Failure via Seperate 351S

[Mbrooke]

In continuation of a prior thread, how do you prevent a separate relay doing breaker failure, sync check, reclose, low SF6 tripping and line MOD (trip) from fighting each other in a ring application?

 

[davidbeach]

Wouldn’t do it, but it would be trivial to design it to work properly.

I’ll see your silver lining and raise you two black clouds. - Protection Operations

 

[Mbrooke]

Wouldn't do it? I thought stand alone BF was a better option.

This one POCO wants it separate.

 

[davidbeach]

No, can't imagine how it would be better. Means more components to the overall system, that's not better.


I’ll see your silver lining and raise you two black clouds. - Protection Operations

 

[Mbrooke]

A lot convinced me otherwise in another thread...

 

[cranky108]

In another thread, there were two differing options offered.

A separate relay maybe an option for maintenance, or other reasons.

I happen to like a separate BF relay, because the relay logic is less complicated to me.

Yes you add an additional relay, but I need to add the push buttons anyway.