Email: sales@runshengdcs.com
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Phone：+86 15383419322Description
The GE SR469-P1-HI-A20-E is a high-performance motor management relay within GE’s Multilin™ SR 469 series, engineered for critical protection and control of large motors (20–6000A) in harsh industrial environments. This comprehensive unit integrates thermal modeling, advanced diagnostics, and SIL 3 safety functions into a single ruggedized enclosure, providing complete motor protection against overloads, phase loss, ground faults, bearing wear, and process anomalies. The “P1-HI-A20-E” suffix denotes key configurations: P1 (Profibus DP communication), HI (High-Impact NEMA 4X/12 enclosure), A20 (20A CT input range), and E (Enhanced sequencing control). Designed for motors driving pumps, compressors, and conveyors, the SR469-P1-HI-A20-E combines real-time motor analytics with <20 ms trip response times, significantly reducing downtime in mining, oil & gas, and water treatment facilities.
Featuring a 5.7″ grayscale LCD with multilingual interface, this relay supports customizable logic via drag-and-drop Function Block Diagram (FBD) programming. Its dual-redundant power supplies (24–240V AC/DC) and conformal-coated electronics withstand extreme conditions (–40°C to +70°C, 95% humidity). For smart factories, the GE SR469-P1-HI-A20-E enables predictive maintenance through continuous monitoring of starts/hour, torque curves, and insulation degradation – bridging motor health data to PLCs/SCADA via Profibus or optional Ethernet.
GE SR469-CASE-469-P1-HI-A20-E
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | SR469-P1-HI-A20-E |
| Manufacturer | GE (General Electric) |
| Product Type | Motor Management Relay |
| Motor Current Range | 20–6000A (via external CTs) |
| Protection Functions | 50+ (Thermal O/L, Stall, Ground Fault, U/F, O/V) |
| Safety Rating | SIL 3 (IEC 61508) |
| Trip Response | <20 ms (phase faults) |
| Control Outputs | 8x Form-C relays (5A @ 250VAC) |
| Communication | Profibus DP-V1 (P1 suffix), RS-485 Modbus RTU |
| Enclosure Rating | NEMA 4X/12 (HI suffix) |
| Operating Temperature | –40°C to +70°C |
| Power Supply | 24–240V AC/DC (dual redundant) |
| Display | 5.7″ grayscale LCD with backlight |
| Certifications | UL, CE, ATEX Zone 2, IECEx |
| Vibration Resistance | 5g @ 10–500 Hz (IEC 60068-2-6) |
Main Features and Advantages
Intelligent Thermal Protection: Patented RTD Emulation technology models rotor/stator temperatures without physical sensors, compensating for cooling loss during starts. The SR469-P1-HI-A20-E’s load- and time-dependent curves prevent nuisance trips while safeguarding against locked rotor and jam conditions.
Safety Integration: SIL 3-certified protection meets IEC 61508 for critical processes. Independent hardware-based trip paths ensure fail-safe operation during processor faults. Ground fault detection down to 0.1A prevents winding damage.
Advanced Diagnostics:
Bearing Wear Analysis: Tracks vibration signatures via accelerometer inputs
Start Performance: Logs torque curves and acceleration times
Energy Monitoring: Measures kWh, power factor, and demand peaks
Waveform Capture: 128-cycle recording for fault forensics
Operational Flexibility: Built-in FBD programming replaces external PLCs for sequencing (e.g., auto-transfer between pumps). Profibus P1 suffix enables direct integration with Siemens/PCS7 systems.
Application Field
The GE SR469-P1-HI-A20-E protects motors in extreme environments:
Oil & Gas: Critical pumps (ESP, seawater injection) on offshore platforms
Mining: Conveyor drives and ball mill motors (dust/vibration resistance)
Water Treatment: Raw sewage pumps with frequent starts/stops
Power Generation: ID/FD fans and BFP motors in coal/gas plants
Chemical Processing: Agitators handling corrosive fluids (ATEX compliance)
Cement plants leverage its thermal modeling for kiln drives, while LNG facilities use SIL 3 functions for cryogenic pump safety.
Related Products
SR469-P5-HI-A20-E: Same platform with Ethernet/IP instead of Profibus
SR750: Feeder protection relay for upstream coordination
GE T60: Transformer relay for motor supply circuits
GE B30: Communications gateway for legacy systems
GE QuickConnect™ CTs: External current sensors (2000:1 ratio)
GE MEPSware™: Configuration software for SR469 logic
SR469-5A-0-0: Base model without comms/enclosure upgrades
GE SR469-CASE-469-P1-HI-A20-E
Installation and Maintenance
Pre-installation preparation: Verify CT ratios and burden compatibility. Mount vertically with DIN rail (TS35) or panel screws. Program motor FLC, starts/hour limits, and trip curves via MEPSware™ before energizing.
Maintenance recommendations: Test protection functions annually using secondary injection. Monitor “Stator Thermal Capacity” trend for insulation degradation. Clean air vents every 6 months in dusty environments. Replace backup capacitor every 10 years.
