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usmankhan
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Join Date: Feb 2009
Posts: 15

Generator KVA

05/13/2009 1:41 AM

I want to buy generator but i want to calculate its KVA.I have load of 10 tubelights,one 1.5ton AC one fridge and seven fans.All these devices have rating in KW.How can i calculate KVA of generator with loads in KW
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dineshpandit80
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Join Date: Mar 2009
Location: delhi india
Posts: 79
Good Answers: 2
#1

Re: Generator KVA

05/13/2009 2:13 AM
  1. One tube light load=18 w
  2. 1.5 tone A/C =3000w or 3 kw
  3. one fridge = 1750 w
  4. one fan =150 w

Total load=18*10+3000*1+1750*1+7*150

=180+3000+1750+1050

=5980 or 6kw

Suppose your power factor = 0.93

So required KVA is =6/.93=6.5 and taking in consider effinciany 80% load will =6.5/.85 that is 8 kva load so 8KVA DG you required for it,kindly add future load if any
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pokalasrao
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Join Date: Jun 2008
Posts: 77
#2
In reply to #1

Re: Generator KVA

05/13/2009 10:57 PM

Hope it is a sample calculation as we normally consider 40 w for tube light & 15% extra for choke,60 watts for fan.If I am wrong it may be corrected.
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IanR
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Hobbies - Musician - New Member Hobbies - Car Customizing - New Member Hobbies - Target Shooting - New Member Engineering Fields - Power Engineering - New Member

Join Date: Jul 2007
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Good Answers: 14
#6
In reply to #1

Re: Generator KVA

05/14/2009 6:23 AM

A good baseline, considering so that so little data it supplied about the details of the load. Of course the actual loads could be very different. I have seen the 8ft tube lights that draw around 80W ea. And the estimation of the load imposed by the 1.5 ton AC is still just an estimation. The fridge, is it a small 6 cu ft unit or a walkin? The original poster really needs to get back to us with more info concerning the charachtaristics of his intended load.
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Anonymous Poster
#7
In reply to #1

Re: Generator KVA

05/15/2009 5:19 AM

1 ton of airconditiononig is not = 2kw power for ur info
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Anonymous Poster
#3

Re: Generator KVA

05/13/2009 11:01 PM

Hi, what kind of wind turbines are you going to purchase?

We are a small-sized wind turbine manufacturer in China. We can offer wind turbines from 500W to 20KW, both isolated and grid tied. Our website:www.chinahummer.cn/eng

If you have any interest, pls. let me know. Thank you!

B/Rgds.

Ani-Luo

MSN/Email:hummer-607@hotmail.com, Skype:Ani-windturbine
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Anonymous Poster
#4

Re: Generator KVA

05/14/2009 1:44 AM

very simple

1 KVA= 1KW

as kva=kilo volt ampere its power unit used in electrical technology
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IanR
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#5
In reply to #4

Re: Generator KVA

05/14/2009 6:18 AM

Uh, in a word, no.

For resistive loads maybe, you could get away with that mistaken assumption. If you were specing a genny on that rule for any kind of inductive load, you are going to end up with too little capacity.

KVA and KW are loosly related and occasionally have the same value, but they are anything but the same.
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ericgbt
Active Contributor

Join Date: Aug 2007
Posts: 11
#8

Re: Generator KVA

05/15/2009 6:29 AM

next time pls mention single or three phase genset. in this case should be single i think :)
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IanR
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#9
In reply to #8

Re: Generator KVA

05/15/2009 6:46 AM

Yeah, I tend to agree. It sounds like someone is trying to decide on a single phase set for home backup.
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