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Why we use two wattmeter during block rotor test and no load test of
3phase induction motor? And how can we understand the neat power
requirement of from this test?
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Answer Posted / natchi
In this test, we use two single phase wattmeters or one 3phase wattmeter, during test one of the 1phase wattmeter reads positive value and other one reads negative value of 3 phase power.
but in usage of 3 phase wattmeter gives directly the whole power of 3 phase supply.
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