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IEEE 142 calculations

IEEE 142 calculations

IEEE 142 calculations

(OP)
Could someone show me the calculations to arrive at the following percentages:
The available ground-fault current should be at least 25% (X0 = 10X1) and preferably 60% (X0 = 3X1) of the three-phase fault current to prevent serious transient overvoltages. Available is considerably higher than the level of fault current desirable in a resistance grounded system.
Thank you

RE: IEEE 142 calculations

Sorry, heberovchem, but how your question is related to IEEE 142?

RE: IEEE 142 calculations

(OP)
It is written on page 16. But I've already figured out. Thank you.

RE: IEEE 142 calculations

Hi heberovchem. can you let me know what did you find?

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