Neutral switching for parallel generator operation
Neutral switching for parallel generator operation
(OP)
When you have parallel generator (emergency standby, permament installation) in operations, through a set of parallel switchgear, is there any special consideration that requires the ATS to also switch the neutral? In the case of a single emergency generator, I always prefer to solidly bond the generator neutral to neutral bus at the main dist panel, which is grounded at that point. In that case I can use a 3-pole transfer switch. But for parallel generator operation, is there something else to consider?





RE: Neutral switching for parallel generator operation
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If we learn from our mistakes I'm getting a great education!
RE: Neutral switching for parallel generator operation
RE: Neutral switching for parallel generator operation
If this is not possible due to ground fault protection issues or the distance from the generators to the main panel it may become real complicated, real quick.
If you have parallel generators connected to the bus by a contactor or breaker, it may be a challenge to arrange a system where the generators are grounded by the system when online, and still safely grounded when offline. In some instances you may need an isolating transformer.
Bill
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"Why not the best?"
Jimmy Carter
RE: Neutral switching for parallel generator operation
RE: Neutral switching for parallel generator operation