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sauravbabu
Power-User
Engineering Fields - Electrical Engineering - New Member

Join Date: Dec 2009
Posts: 247

220kV Circuit Breaker S.C MVA.

05/19/2010 7:41 AM

Dear,

1. How to calculate SC MVA of 220kV Circuit Breaker?

2. How to calculate Rated Normal Current out of it?

Regards,

sks
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kvsridhar
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India - Member - New Member

Join Date: Sep 2009
Location: Temporarily at Ashburn, VA
Posts: 2744
Good Answers: 164
#1

Re: 220kV Circuit Breaker S.C MVA.

05/19/2010 11:59 AM

Isn't there a nameplate on the breaker? as per standards, these values you seek should be there for sure.

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ieshiv
Associate

Join Date: May 2009
Posts: 40
Good Answers: 1
#2

Re: 220kV Circuit Breaker S.C MVA.

05/20/2010 2:04 AM

Give all data releated to breaker than only someone is in the postion to tell ........
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sauravbabu
Power-User
Engineering Fields - Electrical Engineering - New Member

Join Date: Dec 2009
Posts: 247
#3
In reply to #2

Re: 220kV Circuit Breaker S.C MVA.

05/25/2010 8:07 AM

Sorry for the beginner kind of question. But, I think Breaking MVA (Short Circuit MVA) of breaker can be calculated in unit connected scheme of hydrogenerator, only if sub-transient reactance is also known of generator. I was wandering if there is an alternate method. The generator is connected to infinite bus i.e. system grid.

saurav.
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