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4 comments
Participant
Engineering Fields - Electrical Engineering - New Member

Join Date: Oct 2010
Posts: 1

MCB Calculation

10/25/2010 12:29 AM

if total load =36W

V=230v

p.f=0.8

calculate the total load current ,and MCB rate current.

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Guru
Technical Fields - Technical Writing - New Member

Join Date: Feb 2006
Location: Near Delaware Water Gap
Posts: 1208
Good Answers: 71
#1

Re: mcb calculation

10/25/2010 12:43 AM
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Anonymous Poster
#2

Re: mcb calculation

10/25/2010 7:29 AM

Chapter 2, page 5.

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Associate
Engineering Fields - Electrical Engineering - New Member

Join Date: Jun 2010
Location: IEC Domain
Posts: 43
#3

Re: MCB Calculation

10/26/2010 1:32 AM

P=36 W

V = 230VAC

PF = 0.8

Total I = (36)/(1.732*230*0.8)

Total I = 0.11Amps

MCB rated current would also be the same as the total current cause your system consists of only one load and your MCB is for that load too.

Regards,

DG EE.

Note** You can also find a lot of questions like this on the net. You can search them out and then pose a question.

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 22909
Good Answers: 591
#4

Re: MCB Calculation

10/28/2010 1:26 PM

What size is the cable?

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