SINGLE PHASE PREVENTOR

All the 3 Phase motors operate at their best when the power supply in all the 3 phases are continuous and well within the range. Failing of any one of the phases is termed as single phasing. During single phasing, the motors draw more current than the rated value which results in burning of the motor coils within a short span. Single Phase Preventer is a product which provides a solution to this problem by sensing the single phase condition and instantaneously turning off the power supply to the motor thereby protecting the motor from drawing excess current. Single Phase Preventors are incorporated in the starter panels.


Current Sensing Type


Model SP1


Rating : 1 HP , 2 to 3 HP, 3 to 6 HP
Connectors are provided to connect in series with the load.


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MODEL SP2

Rating : 5 HP to 12 HP
Connectors are provided to connect in series with the load.

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Model SP3

Rating : 5 HP to 12.5 HP
Connectors are provided to connect in series with the load.

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Model SP5


Rating : 5 HP to 15 HP, 10 HP to 20 HP
Connectors are provided to connect in series with the load.


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Model SP2W

Rating : 5 HP to 12.5 HP
Wires are provided to connect in series with the load.


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Model Mini



Rating : 5 HP to 20 HP
The load wires need to be passed through the independent CT coils.


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Model SPCL3



Specifications:
Rating : 5 HP to 30 HP
The load wires need to be passed through the independent CT coils .


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Voltage Sensing Type


Model VSP

This is a voltage sensing type single phase preventor which can be used for 3 Phase motors. This senses the presence of all the 3 phases across its terminals and energizes a built-inrelay in case of single phase condition,whose contacts can be used to trip the starter.

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Model AP

This is a Voltage sensing preventor which has all the features of model VSP. In addition, a switch is provided which can be used to short the start button of a starter that enables it to start immediately on arrival of 3 Phase power supply. This model is applicable only for DOL starters.

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Model ASP


This is a voltage sensing preventor that has the features of both model VSP and auto start model C. This model is applicable only for DOL starters.

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