Voltage Sensing SPP

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  • Auxiliary Supply : 440 V AC between R & Y
  • Input from 3 Phase of R, Y, B
  • LED indicator for power &trip
  • Unbalance voltage for tripping = 50 to 60 V
  • Output relay contact rating : 5A at 230V AC
  • Auto reset when 3 phase supply is restored
  • Voltage Sensing operation
  • Field proven design
  • Enclosure : Din Rail Mounting
  • Size : 60 X 70 X 110 mm


This is a Voltage Sensing SPP senses the presence of the three phases and their sequence.
If any one of the phases is absent or the sequence of the three phases is reversed it operates the relay.
This is perfectly suitable for the protection of the three phase motor. It Automatically resets when the fault condition is gone.

Technical Specifications

Enclosure Din rail mounting ABS Plastic
Size Facia 70 (H) X 60 (W) mm, Depth 110 mm
Auxlliary Supply 415 VAC
Input From Three Phases R, Y, B 415 V 50 Hz
Output Potential Free Contact (5 Amps at 230 VAC)
LED Indications One For power on and second for Tripped condition