VSP D1 Minilec Phase Failure Relay

This VSP D1 minilec phase failure relay is a Phase control relay. The voltage measurement range is 0.15VAC to 10VAC. It monitors phases and the presence of voltage on the 3 phases of a 3 phase circuit power supply. It indicates also any phase loss or inversion. It supplies 1 fail-safe change-over contact. The parameter setting is done on the front panel by direct scale by using a screwdriver. It could be used for example to control the power supply of a 3-phase motor. The precision of the display is +/- 10% of the full scale. The time delay on tripping is 0.3s.

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Feature of VSP D1 Phase Failure Relays

  • Phase Failure Unbalance
  • Phase Sequence
  • Auto Reset Fixed Unbalance Setting
  • 1 CO output Relay


Specifications of VSP D1 Phase Failure Relays

Supply Voltage
  • System100-120/220-240/380-440 V AC ± 20% 50/ 60 Hz
  • Auxillary100-120/220-240/380-440 V AC ± 20%
Output Contacts
  • Output Contacts1 CO
Trip Setting(Volts)
  • Phase SequenceYes
  • Phase Unbalance40 V± 6 V (fixed)
Trip Time Delay
  • On Phase Failure/ Unbalance3.5 sec.± 1.5 sec.
  • For Level SensingNA
Resetting Mode
  • Resetting ModeAuto
  • Weight320 gms.
Dimensions (mm)
  • Overall (L x W x D)76 x 30.5 x 117.5
  • Mounting (L x W)68 centre to centre/ 35 mm rail Mounting
  • Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)
  • * Available on request.