zach_zachary1@yahoo.com
Member
- Location
- Apex,NC
I have a 150 amp Siemens Sentron Breaker. Its in a power and control panel for a large pump. The panel door has a rotary handle disconnect that operates the breaker. When you attempt to operate this from the open position to the close position, the breaker powers up then trips. I took the disconnect extension handle and bracket off and operated the breaker a few times, it works perfect. But when I assembled everything it would close then trip open. If you do it a few times it you can make it work.
The problem is I have a 480 volt to 120 volt transformer that blows fuses on the primary side every time the breaker trips or wont stay closed. Its a 2000 va transformer. I looked at sizing up the fuses but I according to 450.3(b) I am stuck with ten amp fuses. The fuses currently in are Bussman LP-CC-10.
Has anyone run into this situation before? The best thing to do would be to get the breaker to close and stay closed. I spent about two hours adjusting the handle and bracket and it still would operate properly.
The problem is I have a 480 volt to 120 volt transformer that blows fuses on the primary side every time the breaker trips or wont stay closed. Its a 2000 va transformer. I looked at sizing up the fuses but I according to 450.3(b) I am stuck with ten amp fuses. The fuses currently in are Bussman LP-CC-10.
Has anyone run into this situation before? The best thing to do would be to get the breaker to close and stay closed. I spent about two hours adjusting the handle and bracket and it still would operate properly.