Description
GE Multilin SR469-P5-HI-A20-E Motor Management Relay
The GE Multilin SR469-P5-HI-A20-E is a high-performance motor management relay designed for medium-voltage applications, offering advanced protection, monitoring, and control capabilities for critical rotating equipment. As part of GE’s SR469 series, this relay combines rugged construction with intelligent features to safeguard motors in industries such as oil & gas, power generation, and manufacturing. With its 5A phase CT secondary inputs and flexible communication protocols, the SR469-P5-HI-A20-E ensures reliable operation in harsh environments while enabling predictive maintenance strategies.
Product Specifications
| Parameter | Value |
|---|---|
| Input Voltage | 70–265 VAC (48–62 Hz) or 90–300 VDC |
| CT Secondary Rating | 5A (configurable to 1A) |
| Output Signals | 4–20 mA analog, 6 Form C relay contacts (SPDT) |
| Communication Protocols | Modbus RTU (RS-485), RS-232 (9600–19,200 baud) |
| Protection Functions | Overload, phase unbalance, ground fault, thermal modeling, short circuit |
| Operating Temperature | -20°C to 60°C (-4°F to 140°F) |
| Certifications | ISO, UL, CSA, CE |
| Dimensions | 17.8 cm x 22.9 cm x 17.8 cm (W x H x D) |
| Weight | 4.8 kg |
SR469-P5-HI-A20-E
Key Advantages and Features
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Comprehensive Motor Protection
- Thermal Modeling: Advanced algorithms calculate motor heating curves with a hot/cold time ratio of 0.89 (16/18), ensuring precise overload protection 1.
- Phase Unbalance Detection: Monitors negative sequence currents to identify rotor imbalances, reducing downtime by up to 35% in critical applications 14.
- Ground Fault Protection: Detects leakage currents as low as 0.1A, safeguarding personnel and equipment in hazardous environments.
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User-Friendly Interface
- Enhanced Front Panel: Features a 40-character LCD display, numeric keypad, and sealed draw-out handle for secure access and configuration 1.
- Auto-Configuration: Simplifies motor parameter setup using the Motor Settings Auto-Configurator, reducing commissioning time by 50% 17.
-
Rugged Design
- IP20 Rating: Protects against dust and accidental contact, while the optional -H variant adds a conformal coating for harsh environments 1.
- Wide Temperature Range: Operates reliably in extreme conditions (-20°C to 60°C), making it suitable for offshore platforms and refineries 16.
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Energy Efficiency
- Low Power Consumption: 85% efficiency minimizes energy costs, with standby power consumption below 5W 6.
- Predictive Maintenance: Real-time diagnostics and event logging enable proactive maintenance, extending motor lifespan by up to 20% 18.
Applications and Use Cases
Industry-Specific Applications:
- Oil & Gas: Protects compressors and pumps in offshore drilling rigs and refineries.
- Power Generation: Monitors steam turbines and generators in power plants.
- Manufacturing: Ensures uptime for conveyor systems, extruders, and HVAC units.
Case Study:
A major oil refinery in the Middle East implemented the GE Multilin SR469-P5-HI-A20-E to monitor critical compressors. By detecting early signs of bearing wear through real-time vibration analysis, the system reduced unplanned outages by 35% and extended maintenance intervals by 20%, saving over $2 million annually in repair costs 14.
SR469-P5-HI-A20-E
Competitive Edge
- Legacy System Compatibility: Unlike modern motor protection relays optimized for newer systems, the SR469-P5-HI-A20-E is specifically engineered to maintain compatibility with GE’s DC-300 drives and 531X series racks, eliminating the need for costly system overhauls 18.
- Cost Efficiency: Its modular design and 10-year warranty (when purchased directly from GE Grid Solutions) make it a more economical choice than comparable third-party replacements 18.
- Proven Reliability: With a failure rate of less than 0.5% per year in industrial applications, the SR469-P5-HI-A20-E outperforms generic power supplies in critical environments 6.
Selection Guide
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Compatibility Check:
- Ensure the relay matches your motor’s CT secondary rating (5A or 1A) and control voltage requirements.
- Verify communication protocols (Modbus RTU, RS-485) align with your PLC or DCS system.
-
Environmental Considerations:
- For corrosive or high-humidity environments, choose the SR469-P5-HI-A20-E-H variant with a conformal coating.
- Ensure adequate cooling in high-temperature settings (e.g., ≥40°C).
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Budget vs. Features:
- Basic models (e.g., SR469-P5-HI-A20-E-01) suit standard applications, while advanced versions include additional safety barriers and expanded I/O 6.
Installation and Maintenance Tips
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Installation:
- Follow anti-static procedures (e.g., use grounding straps) to prevent damage during handling.
- Securely mount the relay in a GE Multilin 469 series rack with proper grounding to minimize EMI 1.
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Maintenance:
- Perform quarterly health checks using GE’s diagnostic tools to monitor voltage stability and component health.
- Replace faulty modules promptly to avoid cascading failures. Spare parts are available with a 1-year warranty 18.
-
Safety:
- Power off the system before replacing modules to prevent electrical shocks.
- Ensure compliance with local safety standards (e.g., NEC, IEC) for hazardous locations.
