first pole to clear factor

Suggest your google this subject. There are a number of hit for you to check out.

Hi partha - Patience man Patience. It is a bad time of year to expect fast answers. (Second post in 3 days)

A guest did reply with an answer.

Now what you should do is to inform us what your current knowledge is and what your position is. Also why do you need the info. (How would you feel if you are on an aeroplane and the pilot ask if anybody knows how what is the meaning of landing gear? )

Don't you have superiors who can explain it to you?

If you were thrown in at the deep end try the following:

Look on the breaker and find the manufacturer and/or model number. Then google for it or contact the supplier (look at the invoices in your stock records) and ask them for specs.

I understand you are an employee of NTPC. If you are at Noida office ask Vinayak Prasad or AGM they will help you. Ok?

Dear patnaik,

FPTCF is termed with TRV of CB pole during current interruption. In simple word it is rise of voltage with respect to time across breaker pole which open first. It may restrike arc & fail CB b,coz of high rise of voltage.

It is depend on Type of grounding & circuit, type of load ( cap., ind.) etc.

Regards,

VB mohite

TCE, Pune