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MILESTONE ELECTRONICS PVT. LTD.

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MILESTONE ELECTRONICS PVT. LTD.

Voltage Sensing Single Phasing Preventer

Mumbai



A Quality Product from
MILESTONE ELECTRONICS PVT. LTD. [View Profile]
Mumbai - India

Description :
Protection against Single Phasing Supply.
Protection against unbalance supply.
Ensures correct phase sequence.
Protection against dangerously low / high voltage.
Time delay provided to avoid mistripping.
Can be used for any HP rated motor.

UNBALANCE SUPPLY :

Unbalance voltage gives rise to negative sequence voltage which in turn increases negative sequence current. Negative sequence current increases core losses and rotor copper losses and decreases torque produced by motor. Due to these motor is heated and draws more current.

SINGLE PHASING :
Single phasing occurs due to blowing of the supply fuse, poor contact in contactor or breaking of the conductor. It is condition of heavy unbalance and motor draws more current. This condition normally no detected by conventional bimetallic relays.

UNDER VOLTAGE :
The motor torque reduces considerably at reduced supply voltage and motor draws more current due to increase in slip.

OVER VOLTAGE :
Higher voltage increases the core losses due to increase in core flux and overstresses the motor insulation.

REVERSE PHASING :
When sequence of phase is reversed motor rotates in reverse direction which is not desirable.

features :
Input Voltage Range :
Single Phase 170 to 270 v
Three Phase 360 to 460 v
Other range are on request.

Output Voltage Range :
210 to 240 v settable ? 1%,
400 to 440 v ? 1% for three phase unit.
Other range on request




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MILESTONE ELECTRONICS PVT. LTD.

We are manufacturers of Server Sharer, VGA Switcher, VGA Multiplier, Boosters, Dual Access System, Training Net, Convertors, Repeaters, Line Driver, Surge Protector, Isolator, Data Switch, USB Data Switch.



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