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Series: 201A

201A Series – Three-Phase Voltage/Phase Monitor
Product Status| Activei
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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

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201A Applications

Highlights Section

  • Fan motors
  • Air conditioners
  • Compressors
  • Heat, well, and sump pumps
  • Small conveyer motors