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Littelfuse® Symcom 201A-AU Phase Monitoring Relay, 190 to 480 VAC, Form C Contact

Selected Littelfuse® Symcom 201A-AU Phase Monitoring Relay, 190 to 480 VAC, Form C Contact
Littelfuse® Symcom 201A-AU Phase Monitoring Relay, 190 to 480 VAC, Form C Contact

Short Description

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.

Features

  • 12 to 22 AWG wire
  • Stranded/solid wire
  • -40 to 70 deg C operating temperature
  • 12 in lbs torque
  • Constant monitoring of loss of any phase, low voltage, high voltage, voltage unbalance, phase reversal, rapid cycling, harmful power line conditions
  • Allows flexibility in panel installation
  • Automatically senses system voltage between 190 - 480VAC. saves setup time
  • Quick visual indicator for cause of trip and relay status
  • Allows compatibility with a variety of motors and reduces nuisance tripping
  • Prevent nuisance tripping due to rapidly fluctuating power line conditions

Specification

Standard & Approvals
UL508 Listed, CE Certified
Voltage Rating
190 to 480 VAC
Contact Configuration
Form C
Frequency Rating
50/60 Hz
Mounting Type
DIN Rail/Surface
Dimensions
1.75 in H x 2.38 in W x 4.13 in D
Series
201A-AU

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