中文版
Description
Technical Specifications
| Product Model | **SR489-P5-LO-A20-E** |
| Manufacturer | GE |
| Product Type | Motor Protection Relay |
| Rated Voltage | 100-480 VAC/VDC (Auto-sensing) |
| Current Input | 5 A (1 A optional via firmware) |
| Protection Functions | Phase Loss, Overload, Ground Fault, Unbalance |
| Control Outputs | 4 Form C Relay (8 A @ 250 VAC) |
| Communication | Modbus RTU, Ethernet/IP |
| Accuracy | ±0.5% of reading (current), ±0.2% (voltage) |
| Operating Temperature | -40°C to +85°C |
| Certifications | UL 508, CE, IEC 60255 |
| Enclosure Rating | IP52 (front), IP20 (terminal) |
Key Features and Advantages
The **SR489-P5-LO-A20-E** provides comprehensive motor protection with adaptive thermal modeling, accurately tracking motor heating/cooling characteristics across variable load cycles. Its dual-powered design maintains protection during voltage dips, while the 256-event oscillographic recorder captures pre/post-fault waveforms for root cause analysis. The relay’s self-powered ground fault detection (<5 mA resolution) prevents insulation degradation in critical motors.
Advanced communication capabilities include IEC 61850 Ed.2 protocol support via optional modules, enabling seamless integration with smart grids. The sunlight-readable LCD displays real-time phasor diagrams and harmonic distortion levels. For harsh environments, the conformal-coated electronics withstand 95% non-condensing humidity and 5g vibration levels.
SR489-P5-LO-A20-E
Application Areas
In mining operations, the **SR489-P5-LO-A20-E** safeguards high-torque conveyor motors from mechanical overloads caused by material jams. Water treatment plants utilize its sensitive ground fault protection for submersible pumps in Class I Division 2 areas. The relay’s motor start supervision prevents damage to compressors in HVAC systems, while its energy monitoring functions optimize efficiency in industrial blower applications.
Related Products
**SR469**: Enhanced protection with arc flash detection.
**SR3PT**: Voltage transducer for **SR489** series.
**IC693ALG392**: Analog input module.
**DS3800HSEA**: Redundant power supply.
**GE EPM 9900**: Power quality meter for load profiling.
Installation and Maintenance
Installation preparation: Verify CT ratios and motor nameplate data before configuring the **SR489-P5-LO-A20-E**. Use 14 AWG shielded cables for analog inputs with separate conduits for power/control circuits. Ensure proper CT grounding to prevent common-mode voltage buildup.
Maintenance recommendations: Perform annual contact resistance checks on output relays. Calibrate current inputs every 3 years using GE’s MPS test kit. Update motor thermal models after significant load changes. Replace backup lithium battery every 10 years to maintain event logging.
Product Assurance
GE’s **SR489-P5-LO-A20-E** undergoes 2000-operation contact endurance testing and 100g shock certification. The 5-year warranty covers all electronic components, with 24/7 access to GE’s Protection Suite software for settings management. Global service centers provide firmware updates and hardware retrofits to maintain compliance with evolving grid codes.
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