ani_1986

Dear All,

i am currently facing the fault F30021 :- power unit ground fault while running a 690v s120 chasiss motor module fed by BLM. The motor triped at this fault. After acknowledge the fault i again started the drive & motor run about 10-15 mins &then again tripped at same fault.
I checked the fault help & found possible causes are :- power cable fault or winding fault or CT defective. But my question is that if any ground fault is there then why after acknowledge the fault motor run about 10-15 mins then tripped ? In a exper list there is a parameter p287: ground fault monitoring threshold ( value is 6%) which is % maximum drive current. What is the meaning of it ? How it works? I could not find anything regarding this fault in function diagram.

Please help me why it happens & hwhat is the meaning of it & how it works?

Thanks in advance.

With best regards,
ani_1986

HI

Can anyone please assist with the above, I have the same problem with the Sinamics G130.

Motor and cable test passed. Those items do not have any issues. 

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Split from F30021 :- POWER UNIT GROUND FAULT.