4 pole vs 3 pole switches/breaker

[dkpramanik]

For a LT panel which have two incoming 5000A ACB from 3phase, 3MVA Dyn transformer & 630A ACB from 3 phase, 250kW Black Start DG set and have several outgoing 3 phase, 100A-300A MCCB for remote distribution panel and have some single phase load.

Could anyone pls advise which type of 3 Pole or 4 Pole ACB and MCCB should I use for the LT panel as per IEC standard?

What are the advantage and disadvantage of using 4 pole vs 3 pole?

 

[Darkwood]

If you are asking these questions then IMHO you are out of your depth here ... are you qualified and experienced to be getting involved with these systems?

 

[Engineer54]

Apart from anything else, nothing in your OP makes much sense!! lol!! Rule of thumb incomers and any stand-by Generator incomer on to a switchboard, should always be 4 pole as well as any bus couplers.... that's as far as i'm going on this one!! lol!!

 

[dkpramanik]

I am looking for the advantages and disadvantages of using 4 pole and 3 pole switches...

 

[Knobhead]

Try typing you homework question word for word, like E54 I can't make any sense of it.

 

[D Skelton]

I'm glad you said that Tony, I was gonna say it looked like a homework question, and a poorly worded one at that?! But I decided to cancel before I posted, the OP is in Bangladesh, I didn't think there was such a thing as an Indian electrical qualification? lol, or is that just me being really ill informed? A mate of mine was working out there and he seemed to think that there wasn't even a code of practice for wiring in India???

 

[Knobhead]

I've a few friends that are tutors at Indian universities. Their reply would have been scathing regarding asking homework questions.

 

[Brightspark2]

Please could someone answer...

dkpramanik has 5 homework questions. He gives one to Tony and answers half of one himself. What percentage of questions does he have left?.


Its not for my homework or anything. I just need the answers.

Thanks in advance.

 

[D Skelton]

That would be 70% brightspark! God you should really know this! Call yourself an electrician!!!!

 

[Risteard]

I'm glad you said that Tony, I was gonna say it looked like a homework question, and a poorly worded one at that?! But I decided to cancel before I posted, the OP is in Bangladesh, I didn't think there was such a thing as an Indian electrical qualification? lol, or is that just me being really ill informed? A mate of mine was working out there and he seemed to think that there wasn't even a code of practice for wiring in India???

Bangladesh is a country - it is not in India. Perhaps you are thinking of Bangalore? Lol

 

[D Skelton]

Bangladesh is a country - it is not in India. Perhaps you are thinking of Bangalore? Lol

Facepalm! haha. TBH, I don't know what I was thinking, that part of the world changes every five minutes!

 

[dkpramanik]

:mad2: :66: :24:


Nobody knows the answer of my question, hahahaha..:wink5:



:dita:


:dita:


I appreciate positive help..

 

[Knobhead]

Nobody knows what you're question is.

 

[dkpramanik]

My question is simple-

For that LT panel- I have selected 4 pole ACB and MCCB, I need technical clarification of selecting such type of CB

so my question no 1- what are the advantages of using 4 pole CB rather than 3 pole CB?

and question no 2- if I select 3 pole- what are the disadvantages of 3 pole CB rather than 4 pole CB..

 

[Knobhead]

We won't do you're homework for you. What conclusions have you come to so far? We will help but you have to show you are doing some work yourself.