Powerware 9330 input circuit breaker CB1 trip.

[RHeTTRoNiCS]

Hello Guys...hope anyone of you have encoutered this problem. I am working in a company, we have a powerware 9330, don't know why suddenly CB1 tripped. Then keep tripping when am going to switch on. The CB1 was configured with shunt trip with note "suitable for ground fault protection". The other side of CB1 there's another pair of wire going to EMO. The CB1 will not trip if the shunt trip is unplug and only EMO wire is attached. Any idea? Thanks in advance for sharing.

 

[chuckey]

So its the shunt trip thats causing the problem. You have to get the circuit out and see how the shunt trip fires. They are often used as overload protection, so there could be some excessive current some where.
What is an EMO?
Frank

 

[RHeTTRoNiCS]

Hello Frank/Chuckey...thanks for sharing ideas...now i am looking into this shunt trip cicuit area and understand how it fires...It'll take a bit slow because i dont have the schematic....emo stands for "emergency off". Thanks again.