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Fluctuating voltages are a problem in India and are the cause for much failure of induction motors and consequently the pumps dr

Wide Voltage Pumps :

Fluctuating voltages are a problem in India and are the cause for much failure of induction motors and consequently the pumps driven by them.

For a given power rating the current increases when the voltage changes above or below the design voltage. For the winding to remain cool, the current density must remain with in the limits. When the voltage varies drastically from the design voltage, current increases and so does the current density. This usually burns the coil

Texmo's range of single and three phase wide voltage capable pumps run at variable supply voltage bands using multi-strand wires in the coil. The winding is suitably adjusted by changing the connections at the termination points. Such motors have been referred to as Transmotors here.

A normal induction motor is designed for a specific supply voltage. The motor can comfortably operate at a band of around -+5% of the design voltage. When voltage drops or increases substantially below or above the design voltage current increases drastically and efficiency of the motor drops.

By using a Transmotors winding the number of turns presented to the supply voltage, can be varied to suit the actual supply voltage. Sensing of actual input voltage can be either by an electrical or an electronic device.

Advantages of Using a Transmotors

Coil burnouts due to voltage fluctuations can be avoided

The motor is optimally loaded

Reduced heating of the stator

Higher efficiency and power factor under varying voltage   conditions

Easier starting under low voltage conditions

Internal Design

Multi standard wires will be used instead of standard wires. The strands will be suitably wired at the terminal box so as to present the requisite number of turns to the supply voltage after sensing the latter. Normally the strands will be of the same cross sectional area and specific resistance.

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