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Earth Fault Loop Impedance with Safety Generator
Former Community Member
Do I take this into consideration? If so how do I size wire in a building with a safety generator? What is my "Ze" when the supply switches from DNO to the safety generator? How do diesel generators behave during faults?
Here is a similar genset being tested during re-sell. Admiting this particular model unit bogs down way more than they typically do when accepting 100% load.
Actually in my experience they all do that to some degree, and buried in the spec is usually something about maximum load step without loss of regulation, which may be around half of full load. If you need to support more load instantly, you need a bigger machine and under-run it.
The ISO call that test "load acceptance" more here.
Here is a similar genset being tested during re-sell. Admiting this particular model unit bogs down way more than they typically do when accepting 100% load.
Actually in my experience they all do that to some degree, and buried in the spec is usually something about maximum load step without loss of regulation, which may be around half of full load. If you need to support more load instantly, you need a bigger machine and under-run it.
The ISO call that test "load acceptance" more here.
