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swapnajit99
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Join Date: Apr 2010
Location: BHARAT
Posts: 25

Circuit Breaker

05/24/2010 1:08 PM

Hello to everyone who joins this forum...can anyone help me in knowing the use of PIR in circuit breaker?
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Anonymous Poster
#1

Re: Circuit Breaker

05/24/2010 1:18 PM

slow and steady!!!!....do you understand a circuit of one light and switch??
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sidhu16
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India - Member - New Member Engineering Fields - Electrical Engineering - New Member Technical Fields - Technical Writing - New Member

Join Date: Feb 2010
Location: India
Posts: 92
Good Answers: 2
#2

Re: Circuit Breaker

05/25/2010 12:42 AM

What do u mean by PIR?
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Anonymous Poster
#4
In reply to #2

Re: Circuit Breaker

05/26/2010 8:18 AM

PIR stands for Preinsertion resistor? Though i know what it is abbreviated for, i don't understand its use.
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Anonymous Poster
#6
In reply to #4

Re: Circuit Breaker

08/02/2010 6:07 AM

You are correct. This Resistor is used to minimise the trasient current at the Lightning transient time. It is used in parallel to the main interrupter contact. It is used for the CB more than 275kV.
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Anonymous Poster
#5
In reply to #2

Re: Circuit Breaker

07/07/2010 9:19 AM

PIR is the Pre incertion resistor.

It is mainly used in HV Breaker.

It closes befroe closing of breaker and should be open after closing of breaker.

its value is in ohms and it is operatied foe few miliseconds to withatand the inrush current during switching of line or HT Transformers
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Anonymous Poster
#3

Re: Circuit Breaker

05/25/2010 5:49 AM

first of all, please learn ohms law and post a simple example worked out yourself. Then we can ask all these hifi question related with high voltage systems.
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