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Home | Electrical Engineering | Electrical Engineering | Formula to calculate SF6 Circuitr Breaker Rating for 220 or 400 KV Voltage Grade

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mdrashid
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Join Date: Oct 2009
Posts: 4

Formula to calculate SF6 Circuitr Breaker Rating for 220 or 400 KV Voltage Grade

10/31/2009 1:30 PM

Hi,

I want to know what is the formula to calculate SF6 Circuit Breaker current rating for for 220 KV oe 400 KV Voltage Grade, provided if I know the rating of transformer.
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#1

Re: Formula to calculate SF6 Circuitr Breaker Rating for 220 or 400 KV Voltage Grade

10/31/2009 4:43 PM

I want a magic wand that will bring peace to the whole world...

Consult a Electrical Engineering consultant.... Give him /her the Correct & complete details of what you want...
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#2

Re: Formula to calculate SF6 Circuitr Breaker Rating for 220 or 400 KV Voltage Grade

11/01/2009 2:13 AM

Transformer rating divided by Root 3 divided by Voltage = Current Rating

Current Rating divided by Transformer percentage impedence = Fault Rating
electricalexpert65
Power-User

Join Date: Oct 2009
Posts: 172
Good Answers: 8
#3

Re: Formula to calculate SF6 Circuitr Breaker Rating for 220 or 400 KV Voltage Grade

11/01/2009 5:09 AM

There are no short cuts to be used in electricity, that too, in EHV levels that you are talking of. Please leave it to the experts.
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