WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
The GE SR745-W2-P1-G1-HI-A-L-R is a high-performance transformer management relay specifically engineered to ensure comprehensive protection and management for power transformers in a wide range of industrial and utility power systems. This relay is extensively used in power generation plants, electrical substations, and large-scale industrial facilities such as cement, petrochemical, mining, steel, and shipbuilding industries. Its core purpose is to monitor and guard transformers against complex fault conditions including overcurrent, overvoltage, differential faults, ground faults, overfluxing, and operational issues related to on-load tap changers. The GE SR745-W2-P1-G1-HI-A-L-R enhances operational reliability by minimizing transformer damage risk and preventing power outages, making it indispensable in control systems that manage critical electrical infrastructure and ensure stable and continuous power distribution.
The GE SR745-W2-P1-G1-HI-A-L-R belongs to the reputed GE Multilin 745 series and functions primarily as a transformer management relay designed for protection, control, and monitoring of small to large power transformers with two or three winding configurations. It integrates into complex power system architectures, providing both primary and backup protection by leveraging multiple current and voltage inputs. The relay’s FlexLogic™ technology allows for customizable programming tailored to the specific needs of diverse power environments, enabling flexible protection strategies and control logic customization. The relay interfaces seamlessly via communication protocols like Modbus and DNP3.0 through Ethernet, RS232, RS485, and RS422, supporting remote monitoring and integration into SCADA and distributed control systems. The SR745-W2-P1-G1-HI-A-L-R delivers engineers and integrators advanced visibility and control over transformer health and operation within their automation schemes.
The GE SR745-W2-P1-G1-HI-A-L-R offers advanced technical capabilities essential for demanding power protection roles. It employs high-speed multi-processor technology along with adaptive harmonic restraint to discern inrush currents from fault currents, reducing false trips during transformer energizing. The relay supports dynamic current transformer (CT) ratio mismatch correction and multiple setpoint groups to accommodate different system configurations and operational states. It sports a user-centric interface with an enhanced 40-character display and an extended keyboard for straightforward configuration, real-time status monitoring, and diagnostic data access. Robust construction allows operation in harsh environments with an operating temperature range from –40 °F to +140 °F and up to 90% non-condensing humidity, while conformal coating and protective enclosure designs increase durability. The module supports overload withstand currents up to 80 times rated for short durations and provides 15 A solid-state output switching capacity, reinforcing long-term reliability and system safety within demanding industrial settings.
- SR745-W2-P1-G1-HI-A-L-R-E
| Parameter | Value |
|---|---|
| Model | SR745-W2-P1-G1-HI-A-L-R |
| Manufacturer | General Electric (GE) |
| Product Type | Transformer Management Relay |
| Rated Voltage | Customary to transformer specifications (e.g., 5 kV typical) |
| Rated Current | Typically 2 A (exact value varies by configuration) |
| Control Power Range | 90–300 V DC, 70–265 V AC @ 40 VA, 48–62 Hz |
| Operating Temperature | –40 °F to +140 °F (–40 °C to +60 °C) |
| Humidity | Up to 90% non-condensing |
| Communication Protocols | Modbus, DNP 3.0 (Ethernet, RS232, RS485, RS422) |
| Solid State Output Rating | Make and carry 15 A at 250 V DC for 500 ms |
| Overload Withstand | 1 second at 80x rated current, continuous at 3x rated current |
| Weight | Approx. 4.8 kg |
| Environmental Protection | IP40 / IP20 ratings |
The GE SR745-W2-P1-G1-HI-A-L-R is complemented by related GE Multilin modules that expand its functionality or provide alternative solutions:
UR6AH – Digital I/O module compatible with GE control systems for expanded digital interface needs.
SR469 – A transformer protection relay for smaller transformers with less complex applications.
SR750 – Relay providing enhanced protection functions for medium to large transformers.
SR760 – Advanced transformer relay with additional diagnostics and communications.
SR489 – Relay specialized in substation automation and power system protection.
Installation of the GE SR745-W2-P1-G1-HI-A-L-R requires careful site preparation to ensure environmental compliance with temperature and humidity specifications. The mounting panel should be sized properly, typically a 19-inch rack or GE-specific enclosure, with sufficient ventilation and dust protection. Verify control power input compatibility and confirm grounding to prevent electrical interference. Maintenance routines include periodic checks of physical condition, inspection of wiring and connections, and cleansing of dust from the relay housing. Firmware should be kept up to date using GE’s EnerVista software suite, enabling the latest improvements and security features. Monitoring diagnostic LEDs and reviewing event logs regularly helps anticipate issues before they impact transformer operations.
