Product Description

The GE SR745-W2-P5-G5-HI-A is a high-performance intelligent protection relay belonging to the GE Multilin 745 series. It is specially developed for comprehensive safety protection, real-time monitoring and operational management of two-winding and three-winding power transformers, serving as core protection equipment for power substation and industrial power distribution systems to prevent transformer faults and equipment damage.

Adopting advanced microprocessor operation architecture and high-speed signal sampling technology, this relay integrates differential protection, overcurrent, overvoltage, undervoltage and frequency protection functions. It supports Ethernet and RS485 multi-protocol communication, with flexible I/O configuration and data recording capabilities. Featuring power-grade anti-interference and rugged industrial design, it ensures 24/7 stable and reliable protection operation for key power transformation equipment.

Main Specifications

1. Full Model: SR745-W2-P5-G5-HI-A; Product Type: Multilin series intelligent power transformer protection and management relay
2. Applicable System: Power substation equipment, industrial power distribution systems, two-winding and three-winding transformer units
3. Core Function: Transformer fault protection, real-time electrical parameter monitoring, data recording and remote communication management
4. Protection Performance: High-speed differential protection response, accurately identifying internal transformer short-circuit and winding faults
5. Monitoring Parameters: Real-time sampling of three-phase voltage, current, frequency and power operating parameters
6. Communication Interface: Equipped with Ethernet and RS485 ports, supporting standard industrial power communication protocols
7. Rated Specification: Compatible with 1A/5A selectable rated current and 100–250V AC/DC control power supply
8. System Adaptation: Suitable for 50Hz/60Hz power frequency systems with wide grid compatibility
9. Data Function: Built-in fault waveform recording and event logging for post-fault analysis and troubleshooting
10. Operational Reliability: Industrial electromagnetic shielding design, adapting to long-term uninterrupted power system operation

Core Functions

1. Acts as the full-functional safety protection core for industrial and substation power transformers.
2. Executes high-sensitivity differential protection to quickly isolate transformer internal short-circuit faults.
3. Provides comprehensive overcurrent, overvoltage, undervoltage and frequency abnormal protection logic.
4. Monitors real-time operating status of transformers to realize early warning of potential equipment risks.
5. Records fault waveforms and event data to support accurate post-fault analysis and maintenance.
6. Supports multi-protocol remote communication for upper system centralized monitoring and management.
7. Features flexible configurable I/O ports to adapt to diverse power system wiring and control demands.
8. Optimizes protection action logic to avoid misoperation and ensure power grid operation stability.
9. Integrates self-diagnosis function to detect relay hardware and operation abnormalities in real time.
10. Guarantees safe, stable and standardized operation of power transformation and distribution systems.

Application Scenarios

1. Power grid substation two-winding and three-winding transformer protection and monitoring projects
2. Thermal power plant and new energy power station power transformation equipment safety control scenarios
3. Petrochemical, metallurgical heavy industry factory high-capacity transformer protection systems
4. Industrial enterprise self-provided power distribution room key power equipment monitoring platforms
5. Old power system protection relay replacement and intelligent upgrading transformation projects
6. High-reliability requirement power grid terminal equipment fault early warning and protection scenarios
7. 24-hour uninterrupted power supply system transformer full-cycle safety guarantee projects
8. Complex electromagnetic environment power system stable protection and data monitoring systems
9. Smart grid construction transformer intelligent monitoring and remote management supporting projects
10. Industrial high-voltage power equipment comprehensive protection and operational status assessment scenarios