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The Dual Voltage Phase Monitor automatically selects which voltage scale to operate from, either 200-280V or 425-525V. When the proper voltage is connected to the phase monitor the internal relay will be energized and the LED will be on steady. An abnormal condition will cause the LED to blink during the trip delay. When the trip delay has expired the internal relay will be de-energized. The LED will then provide a series of pulses that indicate which fault condition is present. When conditions return to normal, the LED will blink during the reset delay. When the reset delay has expired, the LED will come on steady and the internal relay will be energized. The reset delay is also active immediately after power is turned on to the unit. These units can be used on Delta or Wye systems, 50/60 Hz. To add the Over Voltage feature select the OV option. To extend the standard Reset Delay select one of the G options.
Unit of Measure


UL File No.

N/A #E101681

Operating Voltage (AC)

N/A 200-280 V425-525 V

Relay Type


Base Terminal Configuration

N/A "Phoenix Style” Removeable Connectors

Under Voltage Trip

N/A - 15% of Setting for 200-280V, -10% for 425-525V

Under Voltage Reset

N/A - 12% of Setting for 200-280V, -8% for 425-525V

Over Voltage Trip

N/A +15% of Setting for 200-280V, +10% for 425-525V

Over Voltage Reset

N/A +12% of Setting for 200-280V, +8% for 425-525V

Phase Unbalance Trip

N/A 15% with 1 Second Trip Delay 5% with 5 Second Trip Delay

Phase Unbalance Reset

N/A 4 %

Trip Delay

N/A 5 sec. (Delay is reduced to less than 1 sec if Phase Imbalance is 15% or greater.)

Reset Delay

N/A 2 sec. (Standard)

Voltage Ranges

N/A 200 to 280 V425 to 525 V

Output Rating at 240V (AC)

N/A 3A at -40°C to +65°C 5A at -40°C to +50°C

Operating Temperature

N/A -40 to +65 ºC

Storage Temperature

N/A -45 to +85 ºC

Enclosure Material

N/A White Plastic

Protects Against

N/A (Optional Over Voltage) Under Voltage Phase Loss Phase Imbalance Phase Reversal

Customer Options

N/A OV = Over Voltage G5 = 5 Second Reset Delay G10 = 10 Second Reset Delay G20 = 20 Second Reset Delay G30 = 30 Second Reset Delay G60 = 60 Second Reset Delay