Voltage unbalance is the unbalance that occurs when the voltages at different motor terminals are not equal. This is a big problem for power companies generating, and other facilities using three phase power. If left in this condition this can cause transformer and motor windings to prematurely burn open. Using a DMM you are troubleshooting a 480 volt, 3 phase power feeding a fused disconnect connected to a 3 phase, 1 H.P. motor. Your findings are as follows: Phase A/B = 441 volts, Phase A/C = 479 volts and Phase B/C = 457 volts Find the voltage unbalance and determine if this is acceptable.
Voltage unbalance is the unbalance that occurs when the voltages at different motor terminals are not equal. This is a big problem for power companies generating, and other facilities using three phase power. If left in this condition this can cause transformer and motor windings to prematurely burn open. Using a DMM you are troubleshooting a 480 volt, 3 phase power feeding a fused disconnect connected to a 3 phase, 1 H.P. motor. Your findings are as follows: Phase A/B = 441 volts, Phase A/C = 479 volts and Phase B/C = 457 volts Find the voltage unbalance and determine if this is acceptable.
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Voltage unbalance is the unbalance that occurs when the voltages at different motor terminals are not equal. This is a big problem for power companies generating, and other facilities using three phase power. If left in this condition this can cause transformer and motor windings to prematurely burn open. Using a DMM you are troubleshooting a 480 volt, 3 phase power feeding a fused disconnect connected to a 3 phase, 1 H.P. motor. Your findings are as follows:
Phase A/B = 441 volts, Phase A/C = 479 volts and Phase B/C = 457 volts
Find the voltage unbalance and determine if this is acceptable.
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