The Highs and Lows of Motor Voltage

Operating a motor at the "outer limits" of its voltage requirements reduces its efficiency and causes premature failure. The economic loss from premature motor failure is devastating. In most cases, the price of the motor itself is trivial compared to the cost of unscheduled shutdowns of processes. Both high and low voltages can cause premature motor failure, as will voltage imbalance. Here, we'll

Discuss this Article 2

ARNOD MUTOYA (not verified)
on Jan 10, 2013

i whant to find out what could happend if you drop the voltage from 550voltes to 380 voltes on 8kw motor.

lasu
on Apr 25, 2013

Too low voltage to keep reliability in the starting of the motor. On the other hand this condition leads to overheating. All this is load dependent. Some practices with lightly loaded motors obtain improving efficiency, but that's another thing. Hope this comment be helpul.

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