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I've got a bit of an interesting situation on my hands. A customer has asked me to review a short circuit study performed by a 3rd party engineer. The "other guy" found that the customer's gear is rated at 65kA short circuit, but the available fault contributions (utility + in-plant motor...

Thank you for the responses! I agree completely with issue of not setting the 51G setting too high in order to prevent equipment damage during an arcing ground fault. Clearing the fault quickly and at low magnitude is best. My question is really in regards to the neutral grounding resistor...

Hello Folks. New to the forum. I'd like to get some community input on the topic of neutral grounding resistor protection settings when setting ground fault protection settings on a low resistance grounded system. When I was first introduced to system relaying and protection, the engineers that...