Engineering, 17.12.2020 15:10 keshewar4427
An electrodynamometer-type wattmeter is used for power measurement of a load at 100 V and 9 A at a power factor of 0.1 lagging. The pressure coil circuit has a resistance of 3000 Ω and inductance of 30 mH. Calculate the percentage error in wattmeter reading when the pressure coil is connected (a) on the load side, and (b) on the supply side. The current coil has a resistance of 0.1 Ω and negligible inductance. Assume 50 Hz supply frequency.
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An electrodynamometer-type wattmeter is used for power measurement of a load at 100 V and 9 A at a...
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