GE SR745-W2-P5-G5-HI·Transformer Protection Relay ·GE SR745-W2-P5-G5-HI

Description

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Product Overview​

The GE SR745-W2-P5-G5-HI​ is a high-performance transformer protection relay from GE’s Multilin 745 series, designed to provide comprehensive protection and management for power transformers in critical industrial and energy applications. This advanced relay leverages multi-processor technology to deliver robust protection for dual or three-winding transformers, incorporating features such as over-excitation blocking, overfrequency/underfrequency protection, restricted earth fault protection, and system overload monitoring. It operates effectively within a wide temperature range of -40°C to 60°C and supports control power inputs from 90–300 V DC or 70–265 V AC, ensuring reliability in harsh environments. The SR745-W2-P5-G5-HI​ integrates seamlessly into automation systems via RS-232, RS-485, and Ethernet interfaces, enabling real-time communication with software tools like EnerVista 745 for configuration and data analysis. Its modular design with 16 logic inputs and expandable port arrays allows flexible deployment as a standalone unit or within larger protection systems, making it ideal for optimizing transformer lifespan and operational efficiency in sectors like power generation, oil and gas, and manufacturing .

Technical Specifications​

Key Features and Advantages​

Advanced Protection Capabilities: The GE SR745-W2-P5-G5-HI​ offers multi-zone differential protection with harmonic restraint, ensuring accurate fault detection even during transformer inrush conditions. Its over-excitation protection monitors voltage-to-frequency ratios to prevent core saturation, while thermal overload modeling calculates transformer aging in real time. This comprehensive approach minimizes false trips and extends equipment life .

Flexible Integration and Monitoring: With support for multiple communication protocols (Modbus RTU, Ethernet), the relay enables seamless data exchange with DCS/SCADA systems. The front-panel RS-232 port and EnerVista 745 software simplify setup and provide advanced tools for waveform capture, trend analysis, and remote diagnostics. This reduces configuration time and supports predictive maintenance strategies .

Ruggedized Design for Industrial Use: Engineered to withstand extreme temperatures, humidity, and electrical noise, the module features IP20 protection and robust EMI filtering. Its hot-swappable design (in redundant configurations) allows maintenance without system shutdown, critical for continuous operations in industries like metallurgy or water treatment .

Application Areas​

The GE SR745-W2-P5-G5-HI​ is deployed in industries requiring reliable transformer management. In power distribution, it protects grid transformers from faults and imbalances. For oil and gas, it safeguards transformers in compressor stations and refineries, while manufacturing plants use it to ensure uninterrupted power for production lines. Renewable energy applications include solar/wind farm step-up transformers, where it mitigates grid instability risks .

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