Can the efficiency of transformer be measured with the help of wattmeter readi

Can the efficiency of transformer be measured with the help
of wattmeter readings taken at primary and secondary side?
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Question Posted / iamdon

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Can the efficiency of transformer be measured with the help of wattmeter readings taken at primary..

Answer / iamdon

No,Transformer efficiency measured with the help of
wattmeter can't be reliable.

The reason is
The efiiciency of transformer is very high (order of 98.5-
99+)% due to static nature of it.The error associated with
ordinary wattmeter is in the range of 1-2 % .Under this
condition the readings taken cann't be reliable.

The efiiciency is measured with the help of data taken from
two tests namely
Open circuit test--indiaction of core loss
Short circuit test--indication of copper loss.

Author:arbelectbit@yahoo.com

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Can the efficiency of transformer be measured with the help of wattmeter readings taken at primary..

Answer / dabangg

NO . TRANSFORMER READING IS IN KVA SO WEW CANT TAKE A
READING IN WATTMETER

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0 Yes

3 No

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