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The GE 469-P1-HI-A20-E is a Multilin™ 469 Motor Management Relay engineered for advanced protection, control, and monitoring of critical medium-voltage motors (up to 15 kV). This comprehensive device integrates thermal modeling, differential current protection, and sequence-of-events recording to prevent motor damage from overloads, phase imbalances, ground faults, or mechanical stress. Designed for SIL 2 safety applications, the 469-P1-HI-A20-E features a high-immunity (“HI”) chassis resistant to harsh electrical environments, with an embedded 20A breaker control output (“A20”) and Ethernet communication (“E”). Its customizable logic (FlexLogic™) enables complex interlocking and auto-restart sequences, while the 5.7″ LCD provides real-time metering (current, voltage, power, torque) and fault diagnostics. Compatible with GE’s Proficy™ and third-party SCADA via Modbus TCP/IP, DNP3, or IEC 61850, the GE 469-P1-HI-A20-E transforms motors into intelligent assets – minimizing downtime, optimizing maintenance, and extending operational lifespan in demanding industrial processes.
GE 469-P1-HI-A20-E
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | 469-P1-HI-A20-E |
| Manufacturer | GE (Now part of Emerson) |
| Product Type | Motor Protection Relay |
| Rated Voltage | 100-240 VAC/VDC (Auxiliary) |
| Motor Voltage Range | 200 VAC – 15 kV |
| Current Inputs | 3 Phase + Ground (1A/5A CTs), 1 External Ground (Optional) |
| Protection Functions | Thermal Overload (49), Locked Rotor (51LR), Stall (48), Unbalance (46), Differential (87M), Ground Fault (50G/51G), Under/Overvoltage (27/59), Loss of Load (40) |
| Breaker Control | 20A Trip/Close Output (ANSI 94) |
| Communication | Ethernet (Modbus TCP, DNP3, IEC 61850), RS-485 (Modbus RTU) |
| Control Logic | FlexLogic™ (Programmable) |
| Event Recorder | 1024 SOE Records (1 ms Resolution) |
| Display | 5.7″ Graphical LCD with Keypad |
| Environmental | -40°C to +70°C (HI Version), 5g Vibration |
| Certifications | UL 508, IEC 60255, SIL 2 (IEC 61508), ATEX/IECEx Zone 2 |
| Mounting | Panel or DIN Rail |
| Dimensions | 177 x 170 x 160 mm |
Main Features and Advantages
Advanced Thermal Protection: The 469-P1-HI-A20-E uses real-time thermal modeling (I²t) with cooling time constants, accurately tracking motor hotspot temperatures during starts, stalls, and overloads – preventing insulation degradation.
Differential Current Protection (87M): Monitors phase currents at both motor ends for internal winding faults, tripping within 20 ms for high-sensitivity internal fault detection (settings down to 0.1A).
High-Immunity Design: “HI” variants withstand severe EMI/RFI environments (100 kHz burst immunity per IEC 60255-22-1), critical in steel mills or mining sites with heavy VFD interference.
Integrated Control Logic: FlexLogic™ allows custom protection schemes (e.g., permissive start interlocks, pump alternation logic) without external PLCs, reducing system complexity.
Predictive Diagnostics: Tracks motor starts/hour, running hours, and torque trends to schedule maintenance before failure. Records 128-cycle fault waveforms for root-cause analysis.
Ethernet Connectivity: IEC 61850 GOOSE messaging enables fast (<4>
Application Field
The GE 469-P1-HI-A20-E protects mission-critical motors in:
Power Generation: Boiler feed pumps, ID/FD fans, and condensate pumps where unexpected downtime costs >$500k/hour.
Oil & Gas: Offshore platform seawater injection pumps, gas compressor trains, and pipeline booster motors in hazardous (Zone 2) environments.
Mining: Conveyor drives, ball mills, and crushers exposed to dust, vibration, and voltage sags.
Water/Wastewater: Raw sewage pumps and aeration blowers susceptible to clogging and dry-running.
HVAC: Chiller plant motors requiring precise load sequencing and harmonic monitoring.
In each scenario, the 469-P1-HI-A20-E prevents catastrophic failures by detecting mechanical jams, bearing wear (via current signature analysis), and voltage dip ride-through issues.
GE 469-P1-HI-A20-E
Related Products
469-P5-HI-A20-E: Higher-tier version with arc-flash detection (IEC 61850-9-2LE).
369-HI-R-F-F: Feeder relay for upstream breaker protection.
C264PB: 600A current sensor for motor differential protection.
MPS-06E: Modular power supply for redundant 469-P1-HI-A20-E systems.
DSAI-416: Analog input module for vibration/temperature integration.
GEH-6857: Configuration software for 469 series.
VCM-1: Voltage control module for auto-transfer schemes.
Installation and Maintenance
Pre-installation preparation: Verify CT ratios/class (5P20 recommended) and ensure ground CT polarity aligns with relay markings. Calibrate phase rotation settings to match motor direction. Configure FlexLogic™ via GEH-6857 software before energization.
Maintenance recommendations: Annually validate protection settings via secondary injection testing. Monitor thermal capacity usage (%TC) – sustained >95% indicates undersized motor. Quarterly download SOE logs to analyze trip causes. Replace the 469-P1-HI-A20-E‘s internal RTC battery every 5 years. Clean air vents with dry nitrogen to prevent dust accumulation.
