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Participant

Join Date: Aug 2010
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Three Phase Load

08/18/2010 3:29 AM

I am giving three phase incoming supply and taking single phase supply to diffrent places using single phase MCB.So,what will be the Total Three Phase Load (Watts) at incoming.Can anyboby help me in this.

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#1

Re: Three Phase Load

08/18/2010 3:56 AM

Please give us a tabulation of all the single-phase loads, the phases to which they are connected, and the times when these loads will be energized.

The key concept here is to distribute the single-phase loads as equally as possible among the three phases of the supply. This can be tricky, because you need to analyze which combinations of loads may be active at any given time.

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Power-User

Join Date: Mar 2010
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#2

Re: Three Phase Load

08/18/2010 8:11 AM

dear Suresh,

Please do your home work and do not expect others to do it for you.

Then only you will improve your knowledge .( I request our learned readers not to

respond to such basics) . You will never learn swimming unless you are pushed into

water. This forum is not a college or a coaching class.

Manroop. Chennai.

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#7
In reply to #2

Re: Three Phase Load

09/09/2010 2:28 AM

Thanks for ur answer but encouraging and sharing the knowledge is good.There is no sense in learning the knowledge without sharing......

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#3

Re: Three Phase Load

08/18/2010 9:22 AM

dear ,

conservation of energy implies total KW on supply system = connected KW on load side, irrespective of the no. of phases , whether 3 ph. or 1 ph.

( Energy is a scalar quantity , not vector )

So, just add the total connected KW on load side, will be the total KW on the supply system. How ever, depending upon the phase balancing of the connected load, line currents will flow.

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#5
In reply to #3

Re: Three Phase Load

08/19/2010 3:41 AM

Good answer but he will also need to know the Power Factor as well....

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#6
In reply to #3

Re: Three Phase Load

08/19/2010 7:06 AM

Thanks a lot Sir

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Power-User

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#4

Re: Three Phase Load

08/19/2010 2:53 AM

Certainly smells like homework, however, nobody will ever be able to tell what the incoming load, either phase, is or should be if you dont tell them what your connected load is/will be. And if you took the trouble to ADD your different places load, by magic you have found your incoming load. Simple? What you use is what is coming in at that moment of use. You also did not specify what incomer KVA you have.

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Andy Germany (1); Anonymous Poster (1); harry potter (1); jvrj (1); manroop (1); Suresh Ravula (1); Tornado (1)

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