GE 12ICR54A2A Phase Sequence Undervoltage Relay Unit

Module Feature

12ICR54A2A belongs to GE classic ICR protective relay series. It is an electromechanical style three-phase monitoring relay, integrating phase sequence check and undervoltage detection functions. It continuously monitors three-phase AC supply condition. It will trigger output when phase rotation is reversed or system voltage drops below preset threshold, blocking motor start-up or tripping the load to prevent equipment damage. Adjustable setting range for undervoltage pickup, robust electromechanical contact structure, strong anti-interference performance, widely used for large motors, compressors and pump units in power plant, petrochemical and industrial switchgear cabinets.

Working principle

GE 12ICR54A2A samples three-phase voltage signals. Internal phase sequence circuit judges the rotation order of three phases; undervoltage circuit compares measured voltage against setting value. If phase sequence error or undervoltage fault occurs, the relay operates and changes dry contact state to send trip or interlock signal. When three-phase supply recovers to normal condition, relay resets automatically.

Onboard components

Voltage sensing transformer, phase sequence detection circuit, comparison adjustment potentiometer, electromagnetic relay coil, silver alloy contact set, mechanical reset assembly, metal housing, screw terminal block.

LED indicators

No onboard LED indicators.

Hardware self-diagnosis

Visual inspection of contact burning, coil insulation aging, mechanical sticking; continuity test of contact circuit, insulation resistance and operating point calibration test.

Programming software

No configuration software required; undervoltage threshold adjusted by onboard potentiometer.

Electrical & Process Parameters

Model:12ICR54A2A Brand:GE Device type:Phase Sequence & Undervoltage Relay Rated voltage:240VAC Setting range:0.2~2 times rated voltage Frequency:50/60Hz Output:Dry contact Protection:Phase sequence reversal protection, three-phase undervoltage protection

Mechanical & Structure

Mounting:Panel mount inside switchgear Protection class:IP20 Housing:Metal enclosure

Environmental

Operating temperature:-20℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non-condensing Certification:UL compliant Status: GE original ICR series electromechanical protective relay

Installation

Follow lockout-tagout safety procedure before operation. Cut off three-phase monitored voltage supply. Mount GE 12ICR54A2A relay on switchgear panel. Wire three-phase voltage input terminals and control contact terminals. Calibrate undervoltage pickup value according to site requirement, verify phase sequence action function.

Interface

Three-phase voltage input terminals, trip/alarm dry contact terminals.

Diagnostic

Relay fails to operate: input voltage missing or potentiometer misadjusted. Contact cannot switch: coil burnout or mechanical mechanism stuck. False operation: unbalanced three-phase voltage or wiring error.

Product Brief

GE 12ICR54A2A ICR series electromechanical three-phase phase sequence and undervoltage monitoring relay, 240VAC rated, panel mount, for motor and distribution system anti-reverse-phase and undervoltage interlock protection.