GE Multilin 469-P5-HI-A20-E-H Relay Unit

Keywords469-P5-HI-A20-E-H, GE Multilin, 469 relay, motor management relay, MCC protection spare

Module Feature

469-P5-HI-A20-E-H is GE Multilin 469 intelligent motor management relay with conformal coating for harsh environment.

It supports 5A secondary CT input, integrates comprehensive motor protection functions including thermal overload, locked rotor, phase unbalance, ground fault, over/under voltage. It accepts multi-channel RTD signals for winding and bearing temperature monitoring, equipped with 4 programmable 4-20mA analog output channels. Dual Ethernet ports support Modbus TCP, DNP3 and IEC61850 communication, front LCD keypad for local parameter view and operation. Conformal coating prevents corrosion and moisture damage, widely stocked as critical spare for pump, fan and compressor medium voltage motor control cabinet.

Working principle

CT and RTD signals are collected continuously by internal acquisition circuit.

Built-in thermal model calculates motor thermal capacity in real time. When abnormal condition is detected, relay output contacts trip motor starter and send alarm to DCS/SCADA. It records fault waveform, event timestamp and operation log, supports remote parameter modification and fault waveform uploading via network bus. Local keypad can manually trigger test and view real-time measurement data.

Onboard components

Signal acquisition circuit, main CPU board, RTD measurement module, relay output contact bank, analog output circuit, dual Ethernet communication chip, LCD display with keypad, status LED array and metal panel housing.

LED indicators

Front LEDs indicate power OK, RUN, trip status, alarm and communication activity. Measured value, unit and fault code are displayed on LCD screen.

Hardware self‑diagnosis

Built-in supervision detects CT open/short, RTD wire break, power supply anomaly, memory error and communication failure. Protection setting and fault waveform analysis are completed by EnerVista 469 software.

Programming software

EnerVista 469, used for protection curve setup, RTD configuration, communication parameter setting, fault log reading and firmware download.

Electrical & Process Parameters

Model:469-P5-HI-A20-E-H Brand:GE Multilin (GE Vernova) Device type:Motor management protection relay Function:Thermal, electrical and temperature protection, monitoring and control for medium and large three-phase AC motor

Mechanical & Structure

Mounting:Panel flush 1/4 DIN installation Protection class:IP40 front panel, IP20 terminal compartment Housing:Industrial coated relay housing

Environmental

Operating temperature:-40℃ ~ +60℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE, UL Status:Original harsh environment motor protection spare

Installation

Isolate control power and CT circuit before replacement.

Check CT wiring polarity, RTD sensor cable, control power and Ethernet communication wiring, download relay setting file, test protection trip and analog output function after commissioning.

Interface

CT current terminal, RTD input terminal, relay output terminal, 4-20mA AO terminal, dual RJ45 Ethernet port.

Diagnostic

RTD fault alarm: Sensor wire open/short or RTD element damage. Protection false trip: CT wiring reversed, wrong thermal curve or unbalance threshold improper. Network communication offline: Cable damage, IP conflict or switch port fault.

Product Brief

469-P5-HI-A20-E-H motor relay, GE Multilin 469 conformal coated 5A motor management protection spare for industrial MCC medium voltage motor control cabinet replacement.