Description

The 201A-AU is a 3-phase, auto-ranging, dual-range voltage

monitor that protects 190–480 V ac, 50/60 Hz motors regardless

of size. The product provides a user selectable nominal voltage

setpoint and the voltage monitor automatically selects 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. The model 201A-AU includes advanced single LED

diagnostics, where color and 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 for a specified amount or

restart delay time (or manual reset).

FEATURES BENEFITS

Proprietary

microcontroller

based circuitry

Constant monitoring of loss of any phase, low

voltage, high voltage, voltage unbalance, phase

reversal, rapid cycling, harmful power line conditions

Compact design for 8-pin;

DIN rail or surface mount Allows flexiblility in panel installation

Auto-sensing wide

voltage range

Automatically senses system voltage between

190–480 V ac. Saves setup time.

Advanced LED

diagnostics Quick visual indicator for cause of trip.

Adjustable voltage

unbalance trip setting

Allows compatibility with a variety of motors and

reduces nuisance tripping.

Adjustable trip & restart

delay settings

Prevent nuisance tripping due to rapidly fluctuating

power line conditions.