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how to calculate knee point voltage of current transformer?
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Answer Posted / arup
Knee point voltage, Vkn = (VA X ALF)/ In
VA= Burden =30 (Say)
ALF= Accu. Limit. Factor = 20 (Say)
In= Rated Secondar Current =5 amp (Say)
Then Vkn= 120 volts
If CT Ratio is 2000:5 then In=5
Class is 5P20 then ALF=20, P=Protection CT
| Is This Answer Correct ? | 37 Yes | 10 No |
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