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Anonymous Poster

3-Pole ACBs vs. 4-Pole ACBs

05/20/2009 7:38 AM

Can any one explain the difference between 3 pole & 4 pole ACB?
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Bill
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#1

Re: difference between 3 pole & 4 pole ACB

05/20/2009 7:42 AM

Four minus three is one. Sorry -- I couldn't help it.

Where did you run across a four pole ACB? I don't recall ever seeing one.

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elect-ok
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#2

Re: difference between 3 pole & 4 pole ACB

05/20/2009 9:13 AM

may be you mean 4 Pole ACB with R, S, T & N/PE Bus bar like some products from

manufacture that adopt IEC standard.
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Anonymous Poster
#3

Re: 3-Pole ACBs vs. 4-Pole ACBs

05/20/2009 1:46 PM

what's an ACB?
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jack of all trades
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#4
In reply to #3

Re: 3-Pole ACBs vs. 4-Pole ACBs

05/20/2009 3:50 PM

In this electrical context (when describing 3 or 4 pole) it's "Air Circuit Breaker"

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Anonymous Poster
#7
In reply to #3

Re: 3-Pole ACBs vs. 4-Pole ACBs

05/25/2009 4:24 PM

why u given answer if u dont know ACB?

this not a joke site that u come and write any thing this site is for useful for person who know more and not for u

now on words, please dont write any follies answer
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jack of all trades
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#5

Re: 3-Pole ACBs vs. 4-Pole ACBs

05/20/2009 3:56 PM

Apart from the obvious, a 4 pole ACB would be used for special cases such as switching (or isolating) all three phases AND the neutral (where local electrical regulations require this).

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Simon Wan
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#6

Re: 3-Pole ACBs vs. 4-Pole ACBs

05/20/2009 8:23 PM

3 pole ACB (Air Circuit Breaker) consist 3 contact point for "Red", "Yellow" and "Blue'" phase only whereas, a 4 pole ABC consist 4 contact point for "Red", "Yellow", "Blue'" and "Neutral" point.

4 Pole ACB are specially used in the generator changeover panel as we does not want to combine the neutral point of the generator with the transformer neutral point.

Both have the same operating principle.

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