Maximum and minimum fault currents
Maximum and minimum fault currents
(OP)
Hi,
I am performing fault analysis to rate protective equipment in one of our stations. Is it necessary to find the minimum fault current?
My point is, isnt true that you only want to know the maximum fault current so your protective equipment can be rated above this level. So how does minimum fault currents come into the picture?
Thanks
I am performing fault analysis to rate protective equipment in one of our stations. Is it necessary to find the minimum fault current?
My point is, isnt true that you only want to know the maximum fault current so your protective equipment can be rated above this level. So how does minimum fault currents come into the picture?
Thanks






RE: Maximum and minimum fault currents
RE: Maximum and minimum fault currents
thanks
RE: Maximum and minimum fault currents
Mike
RE: Maximum and minimum fault currents
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: Maximum and minimum fault currents
RE: Maximum and minimum fault currents
The high instantaneous set has to be low enough to operate on close faults and high enough not to see the end of the feeder faults. You have to consider both minimum and maximum fault currents when setting this element.