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Kaandeeban
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Join Date: Jun 2009
Location: Colombo, Sri Lanka
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AC Duty Category

06/16/2009 1:32 AM

What is AC current duty category? and please explain why manufactures use AC21/AC22/AC23?

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 Velmurugu Kaandeeban
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jack of all trades
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#1

Re: AC Duty Category

06/16/2009 5:24 PM

The AC category relates to different types of loads and what the contactor contacts are rated at when switching these specific loads.

From the IEC standard.........

AC-21 - Switching of resistive loads, including moderate loads

AC-22 - Switching of mixed resistive & inductive loads, including moderate overloads

AC-23 - Switching of motor loads or other highly inductive loads

Also see previous threads on CR4 on this subject.

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Anonymous Poster
#2
In reply to #1

Re: AC Duty Category

06/16/2009 11:47 PM

Thanking you for your answer.... Thank you very much... And please state what is the meaning of first digit 2???????????
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sb
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#3
In reply to #2

Re: AC Duty Category

06/17/2009 3:03 AM

it is a switch

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Kaandeeban
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Join Date: Jun 2009
Location: Colombo, Sri Lanka
Posts: 8
#4
In reply to #3

Re: AC Duty Category

07/20/2009 12:30 AM

thanks to all

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 Velmurugu Kaandeeban
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