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sandeepn
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Join Date: Feb 2011
Posts: 39

RCCB

04/27/2011 3:43 AM

What are the constructional difference between 'A' type RCCB and 'AC' type RCCB.Some one can help me....
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TonyS
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United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
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Good Answers: 181
#1

Re: RCCB

04/27/2011 4:15 AM

Still trying to make your own?

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sandeepn
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Join Date: Feb 2011
Posts: 39
#2
In reply to #1

Re: RCCB

04/27/2011 4:36 AM

Would you say that your comment.Are you know about this,please help me any one .
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hien.nguyenquoc
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Engineering Fields - Mechanical Engineering - New Member Engineering Fields - Electrical Engineering - New Member Engineering Fields - Construction Engineering - New Member

Join Date: Sep 2009
Location: BH, Vietnam
Posts: 435
Good Answers: 1
#3
In reply to #1

Re: RCCB

04/27/2011 6:07 AM

Tony has a very good memory or he had a real nightmare.

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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
Good Answers: 169
#4

Re: RCCB

04/27/2011 11:33 AM

The current conveyed in today's electrical installations is less

sinusoidal. So, IEC 60755 (General Rules Concerning Residual Current

Protection Devices) has defined three types of RCDs: AC, A and B types,

according to the residual current to be detected.

The AC type is for sinusoidal AC currents.

The A type for sinusoidal AC currents, pulsed DC currents with a DC

component of 0.006A, with or without phase angle monitoring, whether

they are suddenly applied or slowly increased.

The B type, for the same currents as the A type, but in addition for rectifier

currents:

Ø With simple half-wave with a capacitive load producing a smoothed DC

current

Ø Three phase with simple double half-wave.

So, obviously, the construction difference is that there is a filter circuit in

Type A RCCBs and such a filter is not there in Type AC RCCBs.
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sandeepn
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Join Date: Feb 2011
Posts: 39
#5
In reply to #4

Re: RCCB

04/28/2011 12:04 AM

lot of thanks for your valuable answering electrical expert65
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