phasors and power calcs

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#46

From: jan
Date: Wed, 25 May 2005 14:25

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Hello,

I am studying an introductory electronics course and have been given the 
following problem:

A small factory has the following loads operating from the 240Vrms 50Hz 
supply
a) Forty 50 watts incandescent lamps with unity power factor
b) Thirty-five 40 watts fluorescent lamps with a lagging power factor of 0.9
c) One 2400 watts air conditioning system with a lagging power factor of 
0.65.

I am asked to draw the complete phasor diagram and determine the total 
peak current drawn and overall power factor of the factory.

I'm a little stuck :( I have some phasor diagrams put together which I 
am a little unsure of, but I don't really know how to determine peak 
current from this, can anyone shed some light or point me in the 
direction of some material to explain this sort of problem? I've been 
digging through a number of text books and am not really progressing.

Thank you

Jan

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Date: Wed, 25 May 2005 22:25:09 +0800
From: "jan@janhurst.com" <jan@janhurst.com>
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