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Anonymous Poster

Equipment rating

11/04/2008 4:00 AM

Please help me to clarify some question.

Below are circuit breaker's rating that the employer request

rated voltage: 275kV

rated maximum voltage: 300kV

basic impulse insulation level: 1050kV

power frequency withstand voltage: 460kV

lightning impulse withstand voltage: 1050kV

I wish to know that can the circuit breaker with the following rating comply the requirement of the employer. Please give the reason.

rated voltage: 330kV

rated maximum voltage: 363kV

basic impulse insulaton level: 1175kV

power frequency withstand voltage: 510kV

lightning impulse withstand voltage: 1175kV.
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V.I.Abraham
Guru
Safety - ESD - New Member India - Member - New Member Engineering Fields - Energy Engineering - New Member

Join Date: May 2007
Location: Pune , India
Posts: 875
Good Answers: 42
#1

Re: Equipment rating

11/04/2008 9:03 AM

Yes it suits your requirement technically as all parameters are more than the requirement of the employer.But it may be little costlier which may be verified.
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Anonymous Poster
#2

Re: Equipment rating

11/06/2008 7:08 AM

Electrical parameterwise the equipment meet the demand of the voltage class selected.

However, please note that in an outdoor switchyard, the dimension of the equipment play a role in determining clearances. So you need to check.

By the way, where are these equipment proposed to be installed.

best wishes
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