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Anonymous Poster

Electrical - Power Factor Correction

10/05/2010 11:35 AM

Dear Sir,

I want to know why MCCB or heavy duty contactor is used for power factor correction equipment? Why not MCB or RCCB?

Thanks & regards

Ahfaz
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kvsridhar
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#1

Re: Electrical - Power Factor Correction

10/05/2010 12:44 PM

Please get more educated on pf correction. Capacitors are used for this of course. Switching of these capacitors as needed is best done by special contactors meant for this duty, spcifically called AC6b as per IEC 60947-4. They are used because (a) they can attenuate the very high inrush currents of parallely switched capacitors and (b) they have a very long life, in millions of operations, as opposed to any CBs which are not likely to last more than a few thousands of operations mechanically.

Please download and read this document as a start : abb

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RDGRNR
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Engineering Fields - Instrumentation Engineering - New Member

Join Date: Dec 2009
Location: San Antonio, TX USA
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#2

Re: Electrical - Power Factor Correction

10/05/2010 12:47 PM

INRUSH!

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rockraiden
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Engineering Fields - Power Engineering - New Member

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#3

Re: Electrical - Power Factor Correction

10/10/2010 12:17 AM

you're talking about pf correction..yet what you employ were MCCB's..check-out your power triangle/impeadance triangle..and see what affects your power factor...

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