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X/R for utility

X/R for utility

X/R for utility

(OP)
Guys,
I am trying to use a X/R for my utility in ETAP. I have a report from utility guys that shows 4 different X/R for 4 different faults:
LL Fault X/R=4.64328
1LG Fault X/R=1.50927
2LG Fault X/R=3.31539
3LG Fault X/R=4.64338

Which one do you think I should use?

RE: X/R for utility

ETAP only lets you enter the 3LG and 1LG fault information - that should be good enough for most studies, depending on what you are trying to do.

RE: X/R for utility

EasyPower only requires X/R for 3ph and SLG with the corresponding fault current value. I suspect this is typical for most software programs as between the 3ph and SLG faults you should have most of what is needed for a study

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