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yenbala
Participant

Join Date: Mar 2011
Posts: 1

Why DG designed for 0.8 PF?

03/18/2011 10:01 AM

Hi,

I need technical clarification in usage of Diesel generator. Why all the generators are designed 0.8 PF?

Kindly clarify.

Bala
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perry
Power-User

Join Date: Dec 2006
Posts: 346
Good Answers: 6
#1

Re: Why DG designed for 0.8 PF?

03/18/2011 2:31 PM

yenbala; poor power factor overheats the generator .8 is factory tested for temperature rise on the windings. perry
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Anonymous Poster #1
#2

Re: Why DG designed for 0.8 PF?

03/19/2011 3:16 PM

There has been quite a few discussions on this subject
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dhayanandhan
Guru
Engineering Fields - Mechanical Engineering - New Member

Join Date: May 2008
Location: CHENNAI, TAMIL NADU, INDIA.
Posts: 1851
Good Answers: 65
#3

Re: Why DG designed for 0.8 PF?

03/20/2011 5:10 AM

Dear yenbala,

In A.C Power system unity P.F for motor/drive may not be possible since the system needs the Inductance Effect.

At the same time Low Power Factor means higher Line Current, for the same load and resulting in more Heating takes place in the winding which is detrimental to the motor. Hence a balance is struck at 0.8 P.F.

If you desire you can have 0.95 P.F also.

DHAYANANDHAN.S
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ronclarke
Guru

Join Date: Nov 2010
Posts: 507
Good Answers: 3
#4

Re: Why DG designed for 0.8 PF?

03/24/2011 9:41 AM

Mr. Bala, were you in the steel industry at one time?

Thanks

Ron

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 I went to Texas A&M, I am proud to be an Aggee. Proud to be an Aggey, Proud to be an Agie.............Proud to have gone to Texas A&M.
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