GE 469-P5-HI-A20-E Multilin 469 Motor Protection Relay

Description

Product Introduction

The GE 469-P5-HI-A20-E is one of the most widely deployed configurations in the GE Multilin 469 motor protection family. Designed for critical medium-voltage and high-horsepower motor applications, it combines protection, metering, diagnostics, event recording, and communications into a single digital relay. The relay installs into the SR469-CASE, allowing quick removal for maintenance while leaving field wiring undisturbed.

This configuration includes 5 A CT inputs, the HI universal control power supply, four isolated 4–20 mA analog outputs, and the Enhanced (E) display package. Compared with earlier 469 versions, the enhanced display provides a larger LCD, improved diagnostics, additional event information, and easier navigation during commissioning and fault analysis.

Key Technical Specifications

Application Scenarios & The “Trench” Experience

Picture a turbine-driven compressor during startup.

Everything looks normal until the breaker closes. Five seconds later the motor trips. Production stops. The mechanical team checks bearings. Electrical checks insulation resistance. Operations suspects the VFD. Hours later the actual fault is traced to a failed protection relay that no longer processes current inputs correctly.

That scenario isn’t unusual on equipment that’s been running continuously for fifteen or twenty years.

Typical applications include:

• Power Generation — Boiler feed pumps requiring thermal overload, start supervision, and locked-rotor protection.
• Oil & Gas — Compressor trains where analog outputs continuously report motor loading to the DCS.
• Mining — Conveyor and crusher drives requiring jam detection and phase imbalance protection.
• Water & Wastewater — High-service pumps where undercurrent protection detects dry-running conditions.
• Steel, Cement & Pulp Mills — Large process fans where event records help identify intermittent electrical faults.

Field Replacement Example

During a planned outage at a petrochemical facility, engineers replaced a failed 469-P5-HI-A20-E while retaining the existing SR469-CASE. Since all field wiring remained connected to the case, only the drawout relay was exchanged. After restoring the saved settings, verifying CT polarity, and completing secondary injection testing, the motor returned to service before production resumed. That drawout design reduced maintenance time and minimized wiring errors.

469-P5-HI-A20-E SR469-CASE

469-P5-HI-A20-E SR469-CASE

Transparency SOP: Quality Assurance & Testing

We don’t just ship boxes; we test them on actual GE Multilin relay platforms whenever practical.

• Inbound Inspection
  • Verify complete catalog number.
  • Confirm matching relay and SR469-CASE.
  • Inspect LCD, keypad, connectors, and drawout contacts.
  • Check OEM labels and serial numbers.
• Live Rig Testing
  • Apply rated HI control power.
  • Verify successful boot sequence.
  • Test display, keypad, relay outputs, and communication ports.
• Electrical Parameter Checks
  • Verify CT input circuitry.
  • Test digital inputs.
  • Validate all four 4–20 mA analog outputs.
  • Confirm relay contact operation.
• Firmware Verification
  • Record firmware revision.
  • Record hardware revision.
  • Archive configuration compatibility where available.
• Final QC & Packaging
  • Complete operational inspection.
  • Install protective connector covers.
  • Package in anti-static materials with shock protection.
  • Document serial numbers for traceability.

The Veteran’s Tech Trap Guide

⚠️ Don’t order only the relay if your case is damaged.

The relay slides into the . If the drawout connectors are burned, loose, or corroded, replacing only the relay won’t solve intermittent communication or trip problems. Inspect both pieces carefully.

❗ Verify your CT secondary rating.

This model is a P5 version for 5 A CTs. Installing it where the protection scheme uses 1 A CTs will produce incorrect current measurements and compromise motor protection.

⚠️ Save the settings before pulling the relay.

If communications are still available, upload the complete settings with EnerVista. Motor start limits, overload curves, and custom logic often represent years of plant-specific tuning.

❗ Secondary injection testing is mandatory.

Never assume an identical replacement will perform correctly without testing. Confirm CT polarity, trip outputs, analog outputs, and breaker logic before placing the motor back into service.

Frequently Asked Questions (FAQ)

Q1. What is the difference between the relay and the ?

The 469-P5-HI-A20-E is the removable drawout relay. The is the permanently wired housing installed in the panel. The relay slides into the case during installation or maintenance.

Q2. What does the Enhanced (E) option provide?

The E version includes a larger LCD display, expanded diagnostics, and improved event reporting compared with the standard display version.

Q3. Does this model support Ethernet?

No. The 469-P5-HI- uses RS232 and RS485 Modbus RTU communications. Ethernet is available only on catalog numbers ordered with the Ethernet option.

Q4. Can the relay be replaced without disconnecting field wiring?

Yes, provided the remains installed and undamaged. The drawout design allows the relay to be removed while leaving field wiring connected to the case. Plant safety procedures and lockout/tagout requirements must still be followed.

Q5. Why is this relay still available if it has been discontinued?

Many units come from strategic spare inventories, canceled capital projects, or verified industrial surplus channels. Facilities with installed 469 systems often keep identical spares to avoid redesigning motor protection schemes.

Q6. Is this model suitable for medium-voltage motors?

Yes. The Multilin 469 family was designed specifically for medium-voltage and large low-voltage motor protection, with functions including thermal overload, locked-rotor protection, ground fault detection, current imbalance monitoring, and detailed event recording.

Q7. What warranty is typically provided?

Most industrial automation suppliers offer a 12-month warranty on functionally tested new surplus or refurbished units. Before installation, verify the firmware revision, CT rating, control power option, and compatibility with the existing and saved relay settings.