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ruchir_bhoglekar
Participant

Join Date: Feb 2009
Posts: 2

Short Circuit Calculations

02/10/2009 5:05 AM

r/s,
i have some problem releted to short ckt calculation
1) why we use three phase fault for calculation compare to others like-
LG, LL,LLG.

2)WHY WE ARE NOT CONSIDER LOW VOLTAGE SYSTEM IN SHORT CKT CALCULATION.

GIVE MORE DETAIL FOR SHORT CKT CALCULATION AND RELAY CO-ORDINATION.

THANKS
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Electron Plumber
Associate

Join Date: Feb 2009
Location: Bluegrass Country of Kentucky
Posts: 29
Good Answers: 1
#1

Re: Short Circuit Calculations

02/10/2009 10:26 AM

Calculations are based on symetrical and non-symetrical worst case scenarios. I think the best thing would be to read the IEEE Buff Book which is specifically a standard on Fault Calcs and Coordinated Protection.

__________________
 Joe the Electrical Contractor to the EOR, I know it was suppose to be in my base bid, but I still am going to submit a change order for it.
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