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MVPL: Multi-Range Three Phase Voltage Relay

1Ø & 3Ø Voltage

200 to 600VAC

Plug-In Package

Adj. Over & Under Voltage Trip

Phase Loss

Phase Rotation

Phase Imbalance

Adj. Re-Start Delay

Manual or Automatic Reset



The MVPL will monitor either 1Ø or 3Ø line voltage and provide a relay contact closure if all operating conditions are satisfied. Select the operating voltage from the top pot, set the percentage pot for 1Ø or 3Ø, and then apply the supply voltage. To change ranges, remove the supply voltage and re-apply.


The operating conditions include:

• Monitoring voltages within the adjustments:

• Range

• Over and Under percentage

• Three Phase:

• All phase present

• Proper phase rotation (A-B-C)

• Balanced phases


Automatic or Manual Reset is selected by the Restart pot. In Manual Reset when all conditions are correct, the manual reset button below the timing adjustment must be operated.




Line Voltage: 

Single Phase: 200VAC to 240VAC, 1Ø

Three Phase: 200VAC to 600VAC, 3Ø

Supply Voltage:
24VAC, 120VAC or 240VAC, 1Ø, Continuous

Frequency: 50/60Hz

Nominal Voltage: 

Adj. 200 to 600VAC *

Over/Under Voltage: 

Adj. 8% to 14% of Selected Voltage

Phase Imbalance: 5%

Phase Rotation: A - B - C

Drop-out Delay: 2 sec. fixed

Re-Start Delay: 

2 sec to 5 min., or manual reset

Power Consumption: 1.5VA

Output Rating @ 25°C:  

10 Amps @ 125VAC

6 Amps @ 277VAC

1/8 HP @ 125, 277VAC

5 Amps @ 30VDC



Mounting: Plug-In

Termination: 8 Pin (Octal)
(Over 300VAC use OT-08)

Packaging: Dust Cover

Weight: 8.5 Oz. Approx.


Ambient Temperatures

Operating:  0°C to 65°C

Storage:  -40°C to 85°C



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