

The 201A series is a three-phase, auto-ranging, dual-range voltage monitor that protects 190–480 V ac, 50/60 Hz motors regardless of their size. This monitor provides a user-selectable nominal voltage setpoint and will automatically select between the 200 V and 400 V range. It includes advanced, single LED diagnostics where color and light patterns distinguish between faults and normal conditions. This unique microcontroller-based voltage and phase-sensing unit constantly monitors the three-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels for a specified restart delay time.
- Proprietary microcontroller-based circuitry
- Auto-sensing wide voltage range
- Advanced LED diagnostics
- Compact design for 8-pin; DIN-rail or surface mount
- Constant monitoring of single-phase, low-voltage, voltage unbalance, phase reversal, power line conditions – high-voltage monitoring is optional
- Automatically senses system voltage between 190–480 V ac. Saves setup time
- LED indications include: normal operation, power-up restart delay, reverse-phase trip, unbalance/single-phase trip, high/low voltage trip
- Allows flexibility in panel installation
201A Parts
Filters
Part Number | Actions | Input Voltage (V) | Output Form | Termination Type | Mount Method | Dimensions | Weight (kg) | Humidity | Input AC Line Frequency (Hz) | Maximum Input Power (W) | Output Load Rating (VA) | Overvoltage Reset Voltage (%) | Overvoltage Trip Voltage (%) | Restart Delay Range | Trip Delay Range | Trip Point Accuracy (%) | Type of Detection | Undervoltage Reset Voltage (%) | Undervoltage Trip Voltage (%) | Voltage Unbalance Reset (%) | Voltage Unbalance Trip Point (%) |
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Part Number | Actions | Input Voltage (V) | Output Form | Termination Type | Mount Method | Dimensions | Weight (kg) | Humidity | Input AC Line Frequency (Hz) | Maximum Input Power (W) | Output Load Rating (VA) | Overvoltage Reset Voltage (%) | Overvoltage Trip Voltage (%) | Restart Delay Range | Trip Delay Range | Trip Point Accuracy (%) | Type of Detection | Undervoltage Reset Voltage (%) | Undervoltage Trip Voltage (%) | Voltage Unbalance Reset (%) | Voltage Unbalance Trip Point (%) | |
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190 - 480 Vac | SPDT | Torque: 12 in-lbs.; 12 - 22 AWG solid or stranded | 1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm) | 0 Kg (kilogram) | 10 - 95% non-condensing per IEC 68-2-3 | 50 / 60 | 5 | Pilot Duty: 480 VA @ 240 Vac; General Purpose: 10 A @ 240 Vac | 2 s | Under/Over Voltage: 4 s; Unbalance/Phase faults: 2 s | ±1% | 93% | 90% | 4.50% | 6% | |||||||
190 - 480 Vac | SPDT | Torque: 12 in-lbs.; 12 - 22 AWG solid or stranded | 1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm) | 0 Kg (kilogram) | 10 - 95% non-condensing per IEC 68-2-3 | 50 / 60 | 5 | Pilot Duty: 480 VA @ 240 Vac; General Purpose: 10 A @ 240 Vac | 107% | 110% | 2 s | Under/Over Voltage: 4 s; Unbalance/Phase faults: 2 s | ±1% | High Voltage Detection | 93% | 90% | 4.50% | 6% |
201A Applications
- Fan motors
- Air conditioners
- Compressors
- Heat, well, and sump pumps
- Small conveyer motors