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Transformer Grounding Resistor Extended Rating

Transformer Grounding Resistor Extended Rating

Transformer Grounding Resistor Extended Rating

(OP)
When a 400 amp 10 second grounding resistor is subjected to fault currents above 400 amp, how can I calculate the time this resistor can stand at the higher fault currents

RE: Transformer Grounding Resistor Extended Rating

Typically I2T, but a properly sized 400A grounding resistor will not be subjected to more than 400A without a significant overvoltage somewhere.

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