Generator neutral grounding (NGR)

  • #1

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Dear All

here we have two examples of Generator Nuteral Grounding my question about earth switch closing

Example -1

if three generators are in operation and one earthing switch is closed, can we close generator-2 or generator-3 earthing switch closed at a time of parallel operation? yes or not ?
if not please explain in detail

example 2

this operation has separate NGR no confusion we can closed individually.
 

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  • #2
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  • #3
jim hardy
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if three generators are in operation and one earthing switch is closed, can we close generator-2 or generator-3 earthing switch closed at a time of parallel operation? yes or not ?

Why would you want to close more than one ? Any one grounds all generators that are connected to the bus.

On the other hand, it would hurt nothing provided there are not two simultaneous faults on different machines .

And the resistor should be sized according to distributed capacitance of however many machines you intend it to serve.
 

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