Answer Posted / iamdon
Rating of an alternator or any electrical machine/apparatus
reflects its load carrying capability without
overheating.Temperature rise (major threat to insulation)
arises due to internal loss within the machine.
These internal losses include
1)Copper loss and
2)Core or Fe loss(hysterisis and eddy)
Both losses are independent of power factor.
Copper loss is directly proportionl to I*I
Core loss is function of voltage applied/genetated.
Both loss must be taken into account for rating
purpose.Which is only possible with taking VA which has
nothing to do with power factor.
Author:arbelectbit@yahoo.com
| Is This Answer Correct ? | 45 Yes | 12 No |
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