Description
Product Description
The GE SR489-P1-HI-A20-E-H is a high-performance generator management relay designed for critical industrial applications, manufactured by GE Multilin. Part of the 489 series, this relay provides precise monitoring, protection, and control for generators in harsh environments, including power generation, oil and gas, and industrial automation. It offers advanced features like voltage/current measurement, frequency control, and fault isolation, ensuring reliable operation in extreme conditions. The SR489-P1-HI-A20-E-H is built with a conformal coating for chemical resistance and includes an enhanced LCD display for intuitive configuration.
Key Technical Parameters
| Specification | Details |
|---|---|
| Voltage | Control Power: 90–300 V DC / 70–265 V AC (48–62 Hz) |
| Current Input | 1 A phase CT secondaries (P1 variant) |
| Analog Outputs | 4–20 mA (A20 variant) |
| Temperature Range | -40°C to 60°C (with conformal coating) |
| Digital Inputs | 489 sensor supply: 24 V DC (20 mA max) |
| Communication | RS-232, RS-485 (modbus compatible) |
| Protection Features | Overcurrent, underfrequency, overvoltage, ground fault |
| Mounting | 19” rack or panel mount (drawout case) |
| Weight | 7.7 kg (17 lbs) |
SR489-P1-HI-A20-E-H
Advantages and Features
-
Harsh Environment Resilience:
- Conformal coating protects against chemicals, dust, and moisture, making it suitable for extreme industrial settings.
- Operates reliably in temperatures from -40°C to 60°C, exceeding standard industrial relays.
-
Advanced Monitoring & Control:
- Measures voltage, current, frequency, power factor, and MW/MVAR.
- Supports generator synchronization, load shedding, and trip coil supervision.
-
User-Friendly Design:
- Enhanced LCD display for easy configuration and real-time diagnostics.
- Flash memory enables seamless firmware updates.
-
Safety & Compliance:
- Meets UL 508 dielectric strength standards (1.9 kV AC for 1s).
- Dual isolating transformer for ground CT connections.
Application Areas and Use Cases
- Industries: Power generation, oil and gas refining, water treatment, pulp and paper, chemical processing.
- Scenarios: Generator protection in grid-connected systems, off-grid power plants, and industrial machinery.
Case Study:
A coal-fired power plant in Shanxi, China, deployed the SR489-P1-HI-A20-E-H to protect critical generators. The relay’s conformal coating and wide temperature range ensured continuous operation in high-dust, high-temperature conditions. Downtime was reduced by 20% due to its rapid fault detection and isolation capabilities.
A coal-fired power plant in Shanxi, China, deployed the SR489-P1-HI-A20-E-H to protect critical generators. The relay’s conformal coating and wide temperature range ensured continuous operation in high-dust, high-temperature conditions. Downtime was reduced by 20% due to its rapid fault detection and isolation capabilities.
Competitive Comparison
Compared to standard generator relays, the SR489-P1-HI-A20-E-H offers:
- Extended Temperature Range: Operates 20% wider (-40°C to 60°C vs. typical -20°C to 50°C).
- Enhanced Protection: Built-in conformal coating (vs. optional add-ons in 竞品).
- Advanced Metrics: Real-time MW/MVAR monitoring (vs. basic voltage/current in entry-level models).
SR489-P1-HI-A20-E-H
Selection Recommendations
- Compatibility: Ensure compatibility with GE Multilin 489 series systems and CT/PT ratings (1 A phase CT for P1 variant).
- Environment: Choose the HI variant for harsh conditions (chemical resistance).
- Budget: Balance cost with features—premium features like conformal coating justify a 15–20% premium over basic models.
Precautions
- Power Matching: Ensure control power matches the specified range (90–300 V DC/AC) to avoid damage.
- Grounding: Connect all ground terminals for proper operation and safety.
- Maintenance: Regularly inspect the drawout case for debris; test trip functions annually.
- Firmware: Update firmware periodically using GE’s Enervista 489 software.
Conclusion
The GE SR489-P1-HI-A20-E-H is a versatile generator management relay ideal for extreme industrial environments. Its robust design, advanced monitoring, and safety features make it a top choice for critical power applications.
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