KSB Centrifugal Pump Lexicon –

From A to Z

Current requirement of electric motors

The average current requirement (J1 in A) of standard three-phase current squirrel-cage motors (see Asynchronous motors) and direct current motors depends on the motor rating (see Drive rating), motor speed, voltage and power factor.

See Fig. 1 Current requirement

The submerged motor as a wet rotor motor, like the submersible motor, consumes slightly more energy than a dry three-phase current squirrel-cage motor due to the inherent fluid friction and larger gap. The average energy requirement is specified for pole numbers  2 and 4 and for the three-phase system frequency (f) of 50 Hz.

See Figure 2 Current requirement

Canned motors experience additional loss in the can, which further increases the average current requirement.

  

  

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