Pros, Join Our TradeMaster Program!
The 201A is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size. The product provides a user selectable nominal voltage setpoint and the voltage monitor automatically selects between the 200V and 400V range. The 201A includes advanced single LED diagnostics, where color and different light patterns distinguish between faults and normal conditions.
This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the 201A’s output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels.

  • Input Voltage (V): 190 to 480VAC
  • Maximum Input Power: 5W
  • Input AC Line Frequency (Hz): 50/60Hz
  • Output Form: SPDT
  • Output Load Rating (VA): Pilot Duty: 480VA @ 240VAC; General Purpose: 10A @ 240VAC
  • Restart Delay Range: 2s
  • Trip Delay Range: Under/Over Voltage Fault: 4s; Unbalance and Phasing Faults: 2s
  • Trip Point Accuracy (%): ±1%
  • Overvoltage Trip Voltage (%): 110%
  • Overvoltage Reset Voltage (%): 107%
  • Undervoltage Trip Voltage: 90%
  • Undervoltage Reset Voltage (%): 93%
  • Voltage Unbalance Trip Point (%): 6%
  • Voltage Unbalance Reset (%): 4.50%
  • Type of Detection: High Voltage Detection
  • Termination Type: Torque: 12in-lbs; Wire: Stranded or solid 12-22AWG
  • Mounting Method: DIN rail or surface mount (plug-in to OT08-PC socket)
  • Operating Temperature: -20° to 70°C (-4° to 158°F)
  • Humidity: 10-95% non-condensing per IEC 68-2-3
  • Dimensions: 1.75 in H x 2.38 in W x 4.13 in D (44.5 x 60.3 x 104.8 mm)
Hide Description
Manuals (1)
Product Type:

Voltage Meter






Product Reviews

Product Q&A

Add-on Item

This item is cost-prohibitive to ship on its own but is available to ship with orders over $200.

Why don't we show the price of this item?

We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

To see the price, simply add the item to your cart or sign in.