


The 201A-AU 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. Additional adjustment knobs allow the user to set a 1–30 second trip delay, a manual restart or 1–500 second restart delay, and a 2–8 % voltage unbalance trip point. 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 (or manual reset).
- Proprietary microcontroller-based circuitry
- Auto-sensing wide voltage range
- Advanced LED diagnostics
- Compact design for 8-pin; DIN-rail or surface mount
- Adjustable voltage unbalance trip setting
- Adjustable trip and restart delay settings
- Constant monitoring of loss of any phase, low-voltage, high-voltage, voltage unbalance, phase reversal, harmful power line conditions
- Automatically senses system voltage between 190–480 V ac. Saves setup time
- Quick visual indicator for cause of trip
- Allows flexibility in panel installation
- Allows compatibility with a variety of motors and reduces nuisance tripping
- Prevents nuisance tripping due to rapidly fluctuating power line conditions.
201A AU Parts
Filters
Part Number | Actions | Input Voltage (V) | Output Form | 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 | Storage temperature (°C) | Trip Delay Range | Trip Point Accuracy (%) | 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 | 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 | Storage temperature (°C) | Trip Delay Range | Trip Point Accuracy (%) | Undervoltage Reset Voltage (%) | Undervoltage Trip Voltage (%) | Voltage Unbalance Reset (%) | Voltage Unbalance Trip Point (%) | |
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475 - 600 Vac | Form C | 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 B300; General Purpose: 10 A @ 240 Vac | 107% | 110% | Manual; 1 - 500 s adjustable | Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed | ±1% | 93% | 90% | Trip setting minus 1% (5 - 8%); Trip setting minute 0.5% (2 - 4%) | 2 - 8% adjustable | |||||
475 - 600 Vac | Form C | 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 B300; General Purpose: 10 A @ 240 Vac | 107% | 110% | Manual; 1 - 500 s adjustable | Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed | ±1% | 93% | 90% | Trip setting minus 1% (5 - 8%); Trip setting minute 0.5% (2 - 4%) | 2 - 8% adjustable | |||||
190 - 480 Vac | Form C | 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 B300; General Purpose: 10 A @ 240 Vac | 107% | 110% | Manual; 1 - 500 s adjustable | Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed | ±1% | 93% | 90% | Trip setting minus 1% (5 - 8%); Trip setting minute 0.5% (2 - 4%) | 2 - 8% adjustable | |||||
190 - 480 Vac | Form C | 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 B300; General Purpose: 10 A @ 240 Vac | 107% | 110% | Manual; 1 - 500 s adjustable | Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed | ±1% | 93% | 90% | Trip setting minus 1% (5 - 8%); Trip setting minute 0.5% (2 - 4%) | 2 - 8% adjustable |
201A AU Applications
- Fan motors
- Air conditioners
- Compressors
- Heat, well, and sump pumps
- Small conveyer motors