Hi, I looking for a real good formu
Hi, I looking for a real good formu
(OP)
Hi, I looking for a real good formulas for high resistance grounded neutral applications, and figuring correct wire sizes for installation.
fjconair
fjconair
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Hi, I looking for a real good formu
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RE: Hi, I looking for a real good formu
Or, maybe you're looking how to size the resistor itself. As a minimum it has to be sized for more than the system charging current. Some sources say 5 times the charging current is a good minimum, with 7 to 10 times required to sense ground faults on the 90% of a machine winding farthest from the neutral. Charging current can be estimated or measured, but is on the order of 0.5 to 1.0 ampere/MVA for most industrial installations.
If you're looking for something else, please be more specific.