201A-AU-OT - 201A-AU Series – Three-Phase Voltage/Phase Monitor Series

Series: 201A-AU Series – Three-Phase Voltage/Phase Monitor
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The 201A-AU is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size. Has user adjustable 1-30 second trip delay, manual or 1-500 second restart delay, and 2-8% voltage unbalance trip point. The product also provides a user selectable nominal voltage setpoint and the voltage monitor automatically selects between the 200V and 400V range. The Model 201A-AU includes advanced single LED diagnostics, where five 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-AU's output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels.

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Product Literature

For Technical Questions

Call +1 800-832-3873 or email us at relays@littelfuse.com 

Property (Mouseover for details) Value
Input Voltage (V) 190 - 480 Vac
Maximum Input Power 5
Input AC Line Frequency (Hz) 50 / 60
Output Form Form C
Output Load Rating (VA) Pilot Duty: 480 VA @ 240 Vac B300; General Purpose: 10 A @ 240 Vac
Restart Delay Range Manual; 1 - 500 s adjustable
Trip Delay Range Under/Over and Unbalance Voltage: 1 - 30 s adjustable; single-Phase faults: 1 s fixed
Trip Point Accuracy (%) ±1%
Overvoltage Trip Voltage (%) 110%
Overvoltage Reset Voltage (%) 107%
Undervoltage Trip Voltage 90%
Undervoltage Reset Voltage (%) 93%
Voltage Unbalance Trip Point (%) 2 - 8% adjustable
Voltage Unbalance Reset (%) Trip setting minus 1% (5 - 8%); Trip setting minute 0.5% (2 - 4%)
Mounting Method DIN rail or surface mount (plug into OT08-PC socket)
Operating Temperature -40° to 70°C (-40° to 158°F)
Storage Temperature (F/C) -40° to 80°C (-40° to 176°F)
Humidity 10 - 95% non-condensing per IEC 68-2-3
Dimensions 1.75 H x 2.38 W x 4.13 D in. (44.5 x 60.3 x 104.8 mm)
Weight (lbs/g) 0 Kg
Check Stock Yes

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