Earth Fault on System

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Thread Starter

blackstoneboy

Can anyone explain to me how this happen.

We are synching 3-2.5MW DG. During no load, the 3 generators are synchronized. When we add the load, a fault current is detected by our controller but only in 1 genset breaker and tends to trip the breaker. Can anyone help me on this? Where is the fault coming from? Basically its not from the load because only 1 genset is tripping during the loaded state.
 
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