why one of the wattmeter reads negative at the moment of starting the induction while both are positive while loading
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I'm considering that the question intends to understand about why a watt-meter(one of two) shows a negative reading with induction motor on no-load using two-watt-meter method.
The reason why a watt-meter displays an negative reading is due to inductive nature of induction motor at low-loads/no-load (similar to transformer).
The reason why a watt-meter displays an negative reading is due to inductive nature of induction motor at low-loads/no-load (similar to transformer).
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