Single Phase Preventer

Single Phase Preventer, 1 DPDT relay

Product: SPPA2M2
  • Monitor Phase loss, Phase asymmetry, Over / Under voltage in 3 phase 3 wire configuration
  • Clear LED indication for Power ON & Trip
  • Output relay: 2 C/O (DPDT)
  • Accuracy: ±1% of F.S.
  • Supply voltage: 280 to 520V AC (L - L)
  • Mounting : DIN-rail

Brief Specifications

Measuring Parameter Monitors : Phase Loss, Phase Asymmetry, Over Voltage & Under Voltage
Electrical Connection 3Ø-3W
Operating Voltage 280 to 520V AC(L-L)


Functional Specification
Phase Imbalance : 30V (fixed),
Hysteresis : 6V,
Voltage Accuracy : ±1% of full scale,
Time Accuracy : ±5% ±100ms,
Power on delay : 3sec (fixed)



Trip setting
Phase Asymmetry : 30V (fixed),
Over Voltage trip : 10% of nominal voltage,
Under Voltage trip : 15 % of nominal voltage,
Trip & Recovery time delay :
<120ms for phase loss, phase asymmetry
<200ms for over voltage, under voltage
Reset Condition After removal of fault condition reset automatically after hysteresis of 6V

Output Contact
No. of Relays : 2
Output Contact : DPDT(2C/O)
Contact Rating : 5A@250VAC resistive
Relay status Healthy :- COM-NO
Trip :- COM-NC
Size 35 X 90 mm
Mounting Type DIN rail Mount

Product Variants

Product Code Operating Voltage
SPPA2M2 280 to 520V AC(L-L)
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