Three-phase pumps rely on a correctly connected and stable electrical supply to operate safely and efficiently. Conditions such as incorrect phase sequence, phase loss, voltage imbalance, under-voltage and over-voltage can cause reverse rotation, reduced pumping performance, excessive motor heating or complete equipment failure. A three-phase voltage monitoring relay continuously checks ...
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Industry: Pumping, irrigation and piping
Protecting Against Voltage Imbalance
Voltage imbalance occurs when the three phase-to-phase voltages of a three-phase supply are not equal. Although the difference between phases may appear relatively small, the resulting current imbalance within a three-phase motor can be considerably greater, leading to increased heating, reduced efficiency, lower available torque and premature insulation deterioration.
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