中文版
Description
Technical Specifications
| Product Model | **GE SR745 745-W3-P5-G5-HI-E** |
| Manufacturer | General Electric (GE) |
| Product Type | Advanced Motor Protection Relay (Multilin Series) |
| Input Voltage | 85-265 VAC/VDC (Wide Range) |
| Current Inputs | 5A or 1A CTs, 6 RTD Inputs for Thermal Monitoring |
| Protection Functions | 49 Thermal Overload, 50/51 Phase/Ground Overcurrent, 46 Negative Sequence, 48/51LR Locked Rotor, 26/27 Under/Overvoltage |
| Communication | Modbus TCP, Ethernet/IP, PROFIBUS-DP (Optional), IEC 61850 GOOSE |
| Relay Outputs | 4 Form-C Contacts, 2 Form-A (Alarm) |
| Operating Temperature | -40°C to 85°C (Conformal Coating Available) |
| Certifications | UL 508, IEC 60255, ATEX Zone 2, DNV-GL Marine |
SR745-W3-P5-G5-HI
Key Features & Advantages
The **GE SR745 745-W3-P5-G5-HI-E** integrates motor thermal modeling with real-time RTD feedback to prevent insulation failure. Its dynamic unbalance protection (46) detects stator winding degradation. The relay’s 256-sample/cycle waveform capture aids in diagnosing mechanical issues like bearing wear or load torque anomalies. Built-in load profiling tracks motor efficiency trends for predictive maintenance.
Advanced cybersecurity: Role-based access control and encrypted communication (IEC 62351). The HI-E variant includes enhanced EMI immunity (50 kV/m per IEC 61000-4-3) for harsh industrial environments. GE’s EnerVista software provides motor start analysis and coordination studies. Optional dual Ethernet ports enable redundant ring topologies for critical processes.
Applications
Essential for **oil & gas** compressor motors (API 670 compliance), detecting belt slippage via current signature analysis. **Mining** operations use it to protect conveyor drive motors from overload during jam conditions. **Water utilities** rely on its pump cavitation detection through power factor monitoring. Also deployed in **HVAC chillers** and **marine propulsion systems** for insulation resistance tracking.
Related Products
**SR750 Feeder Management Relay**.
**Multilin 369 Motor Protection Relay**.
**DS200IOECG1 Communication Card**.
**EX2100e Excitation Control**.
Installation & Maintenance
**Installation**: Mount on DIN rail or panel using corrosion-resistant hardware. Ensure CT secondary circuits are grounded at one point. Configure RTD types (PT100/PT1000) via EnerVista. **Testing**: Validate thermal curves using motor nameplate data (FLC, service factor). Perform megger testing on motor windings before energizing. **Maintenance**: Clear fault logs quarterly; recalibrate RTD inputs biannually with precision decade box. Update firmware to patch vulnerabilities via GE Digital Energy Portal.
Product Assurance
The SR745 undergoes 8 kV surge immunity testing per IEC 61000-4-5. Includes a 5-year warranty with 15-year lifecycle support. Complies with NEMA TS2 for traffic control and IEEE 841 for severe-duty motors. GE’s Field Services offer motor protection audits and relay setting customization. Documentation includes ANSI/IEEE C37.96 arc-flash mitigation guidelines.
Please contact Sunny sales@xiongbagk.cn for the best price.
➱ sales manager: Sunny
➱ email mailto: sales@xiongbagk.cn
➱ Skype/WeChat: 18059884797
➱ phone/Whatsapp: + 86 18059884797
➱ QQ: 3095989363
➱ Website:www.sauldcs.com
