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How to calculate short circuit? (MVA method)

 

%Z x

  Base MVA

 

     Transformer Rating

Z pu     =

 

Base MVA

Z(pu)T

Fault MVA     =

 

Fault MVA

√3 x Voltage

Fault Current  = 

 

 

Calculations Circuit Design Circuit Training Electrical Circuit Simulation
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Question added by sandip dobariya , substation engineer , Reliance jio infocomm ltd, Reliance corporate park
Date Posted: 2015/12/17
Upvote (0) Views (13) Followers (2) Answers (2) Report Question
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Phanindra Ganesh

MVA method for short circuit current calculation using3 simple steps explained here in detail. https://electengmaterials.com/short-circuit-current-calculation-mva-method/ Thanks for asking..

muhammad faizan
by muhammad faizan , Assistant Manager , SUPARCO

Zpu = MVA / MVA(sc)

MVA(fault) = (Rated MVAx100) / (%Zpu)

Fault current = Fault MVA / (sqrt(3)xVoltage)

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