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gideon


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#1 Guest__*

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Posted 05 June 2005 - 06:40 AM

if you have a pf of 0.8pf 3phase and 1.0pf 1phase is it bad. and what is the acceptable range.the device is a generator. of a capacity of 900kva 3phase 60hz @480vac.

#2 marke

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Posted 05 June 2005 - 08:38 AM

Hello
The optimium power factor is 1.0 - you can not go higher.

Any power factor less than 1.0 will impact on the "system" efficiency.
It is common to target a power factor of 0.95 or better.

In the case of your generator, a lower factor of 0.8 will reduce the KW that you can load the generator up with. Your 900KVA generator will be fully loaded by a 720KW load at a power factor of 0.8, but 855KW with a power factor of 0.95

There will be more KW wasted in the alternator, transformer and cables at a pf of 0.8

Best regards,

#3 Guest__*

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Posted 05 June 2005 - 02:32 PM

how much of power output percentage is loss at 0.8 from the optimum 1.0.how bad is the generator performing in terms of percentage. thanks.

#4 marke

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Posted 05 June 2005 - 10:48 PM

If your generator is rated at 900KVA and your power factor is 0.8, then your maximum KW load is 900 x 0.8 = 720KW

You are operating at 80% of maximum Generator Power.

Best regards,




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