Question: Two star - connected motors are connected to a three - phase, 4 8 0 V supply. The details of the motors are as follows:
Two starconnected motors are connected to a threephase, V supply. The details of the motors are as follows:
Motor is a Hp induction motor, that operates fully loaded with an efficiency of at a power factor of lagging.
Motor is a Hp synchronous motor, that is also fully loaded with an efficiency of at a power factor of leading.
Two wattmeters are used to measure the total power drawn by the motors. Wattmeter mathrmW has its current coil connected in the red line, and its voltage coil connected across the red and yellow lines.
Calculate:
i The current drawn by each motor through the red line.
ii The power measured by Wattmeter mathrmW
iii. The line current measured by Wattmeter mathrmW
iv The power measured by Wattmeter mathrmW
Recall that mathrmhpmathrm~W
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