GE SR469-P5-H-A20-T | 5A CT 4-20mA Motor Protection Relay

Description

• Brand: GE Multilin
• Full Model Number: SR469-P5-H-A20-T
• System / Series Family: Multilin 469 Motor Management Relay
• Core Function: Motor protection, control, metering, monitoring, and diagnostics for medium- and large-sized motors
• Top 3 Hardcore Specs: P5 5 A phase CT inputs / H 70–265 VAC or 90–300 VDC control power / A20 four 4–20 mA analog outputs
• Relay Type: Drawout motor management relay
• Phase CT Rating: 5 A
• Control Power: 70–265 VAC or 90–300 VDC
• Analog Outputs: 4 × 4–20 mA
• T Option: Enhanced thermal model / motor protection option
• Communications: RS485 serial interface
• Stock Status: New Surplus / Factory Sealed — exact physical condition to be confirmed before quotation

Module 3: Technical Product Introduction

A motor protection relay failure can remove several protection and monitoring functions from the same motor feeder. The GE Multilin SR469-P5-H-A20-T belongs to the 469 Motor Management Relay family and is configured for 5 A phase CT inputs, high-range control power, four 4–20 mA analog outputs, and the T option. The 469 is designed for medium- and large-sized motors, combining electrical protection with thermal modeling, RTD monitoring, metering, event recording, diagnostics, and programmable control functions.

The P5 configuration is particularly important when replacing an existing relay: it specifies 5 A phase CT secondaries rather than the 1 A P1 configuration. The H power option accepts 70–265 VAC or 90–300 VDC, while A20 provides four 4–20 mA analog outputs. The T option adds the applicable enhanced thermal/motor-protection functionality defined for the 469 ordering structure. These configuration codes should be matched exactly before installation; changing one suffix can alter the relay’s electrical interface or protection capabilities.

Module 4: Application Scenarios & Field Realities

• For large pumps and compressors, the 469 can combine phase-current protection with motor thermal monitoring and RTD inputs. During replacement, record the existing motor FLA, CT ratios, acceleration parameters, RTD assignments, and trip settings before removing the relay.
• In medium-voltage motor switchgear, the 5 A CT configuration must correspond to the installed current-transformer secondary circuits. A P1 1 A relay is not an interchangeable substitute for this P5 version simply because both belong to the 469 family.
• Where a DCS receives motor measurements through analog signals, the A20 option matters. The four 4–20 mA outputs may be assigned to specific measured quantities in the relay configuration, so those assignments should be documented before commissioning the replacement.
• During planned MCC maintenance, the drawout construction allows the relay assembly to be exchanged without replacing the complete protection panel. The CT circuits, control power, trip wiring, RTDs, and communications still require controlled isolation and verification.

GE SR469-P5-H-A20-T

Module 5: Migration, Compatibility & Installation Traps

Replacement Matrix

Field Traps — Watch Out

P5 versus P1 CT rating: P5 denotes 5 A phase CT secondaries. Do not substitute a P1 version without reviewing the CT circuits and relay configuration. The difference is an electrical interface requirement, not merely a catalog variation.

Control-power verification: The H option uses a high-range supply of 70–265 VAC or 90–300 VDC. Verify the actual panel supply before energizing the relay. Never apply an assumed voltage based only on the 469 family name.

A20 analog outputs: Four 4–20 mA outputs are available with the A20 option. Record the existing output assignments and scaling before replacement. A relay can pass its startup checks while still sending incorrect process values to the DCS.

CT circuit safety: Never open-circuit an energized CT secondary. Follow the site’s approved CT shorting, isolation, and lockout procedure before disconnecting the drawout relay.

Protection settings: A replacement relay is not fully commissioned merely because it powers up. Motor FLA, CT ratio, thermal model, acceleration profile, trip thresholds, RTD assignments, and output logic must match the approved protection study and application settings.

GE SR469-P5-H-A20-T

Module 6: Quality Assurance SOP

The pre-shipment inspection for a GE Multilin SR469-P5-H-A20-T should verify the complete ordering configuration and principal relay functions:

1. Part-number verification — Confirm the complete identification as SR469-P5-H-A20-T and record serial number, hardware revision, firmware revision, and visible manufacturing information.
2. OEM anti-counterfeit visual inspection — Examine the GE Multilin nameplate, faceplate, display, enclosure, terminal markings, connectors, PCB markings, and manufacturing identifiers for inconsistencies or unauthorized modification.
3. Mechanical inspection — Check the drawout housing, extraction mechanism, rear terminals, connectors, faceplate, display, mounting hardware, and accessible PCB areas for cracks, corrosion, deformation, contamination, or impact damage.
4. Configuration verification — Confirm the complete P5-H-A20-T option string against the physical identification. In particular, verify the 5 A CT configuration, high-range control power, four analog outputs, and T option.
5. Power-on self-test (POST) — Energize the relay using a controlled supply within the verified H-option range and check startup behavior, display operation, self-test results, alarms, and diagnostic indications.
6. Current-input verification — Using an approved relay test set, inject controlled current appropriate to the 5 A CT configuration and verify measurement and applicable protection responses.
7. Thermal-model verification — Test applicable motor thermal protection functions using the approved GE 469 test procedure. Verify alarm, trip, and reset behavior against the specified test points.
8. RTD verification — Where applicable, connect an RTD simulator and verify temperature measurement, alarm thresholds, diagnostic behavior, and assigned channels.
9. Analog-output verification — Test all four A20 4–20 mA outputs across their applicable range. Confirm output response and assignment against the configured test parameters.
10. Communication handshake verification — Test the RS485 serial interface using the applicable 469 communication configuration. Verify addressing and transmit/receive behavior under controlled conditions.
11. Protection-function verification — Perform secondary-injection testing for applicable phase, ground, thermal, voltage, current, and motor-protection functions included in the customer’s configuration.
12. Relay-output verification — Verify applicable trip, alarm, auxiliary, and control contacts using a controlled sequence. Confirm that contact operation corresponds to the configured logic.
13. Final inspection and packaging — Photograph the exact SR469-P5-H-A20-T label, record firmware and test results, protect the drawout contacts and faceplate, apply appropriate ESD precautions, and package the relay against mechanical shock and moisture.

The final QA record should connect the order code, 5 A CT verification, H power-supply test, A20 analog-output test, T-option functional test, protection results, communications test, firmware information, and final packing record to the exact unit shipped.