You have the task of ordering a replacement inductor for one that has become defective. The information on the nameplate has been painted over an cannot be read. The machine that contains the inductor operates at 480 volts at a frequency of 60 Hertz. Another machine has an identical inductor in it, but its nameplate has been painted over also. A clamp on amp meter indicates a current of 18 amps, and a voltmeter indicates a voltage drop across the inductor of 324 volts in the machine that is still in operation. After turning off the power and locking up the panel, you disconnect the inductor in the operating machine and measure the wire resistance of 1.2 ohm with an ohmmeter. Using the identical inductor in the operating machine as an example, what inductance value should you order and what would be the minimum VAR rating of the inductor? Should you be concerned with the amount of wire resistance in the inductor when ordering
You have the task of ordering a replacement inductor for one that has become defective. The information on the nameplate has been painted over an cannot be read. The machine that contains the inductor operates at 480 volts at a frequency of 60 Hertz. Another machine has an identical inductor in it, but its nameplate has been painted over also. A clamp on amp meter indicates a current of 18 amps, and a voltmeter indicates a voltage drop across the inductor of 324 volts in the machine that is still in operation. After turning off the power and locking up the panel, you disconnect the inductor in the operating machine and measure the wire resistance of 1.2 ohm with an ohmmeter. Using the identical inductor in the operating machine as an example, what inductance value should you order and what would be the minimum VAR rating of the inductor? Should you be concerned with the amount of wire resistance in the inductor when ordering?
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