GE SR745-W2-P5-G5-HI Transformer protection relay
Specific Parameters
Brand GE (General Electric, American Original Factory), Product Series GE Multilin SR745 Series
Product Type Industrial-Grade High-Performance Transformer Protection Relay, Comprehensive Protection Relay, Power Distribution System Protection Component, Original Authentic Spare Part
Model GE SR745-W2-P5-G5-HI (Core Model SR745, Suffix W2=20-60VDC/20-48VAC Operating Power Supply, P5=1A Rated Current Input, G5=85-265VAC/DC Control Power Supply, HI=Standard Hardware I/O Module)
Country of Origin United States (Produced by GE Original Factory)
Compatible Devices Various Sizes of Power Transformers, Feeders, Busbars, Current Transformers (CT, 1A Secondary Side), Voltage Transformers (PT), Industrial Automation Systems, Power Monitoring Systems, SCADA Systems, Circuit Breakers, Contactors, EnerVista 745 Configuration Software
Core Functions Comprehensive Transformer Protection, Feeder Protection, Busbar Protection, Operation Parameter Monitoring, Fault Recording, Harmonic Monitoring, Total Harmonic Distortion (THD) Monitoring, Sequence of Events Recording, Remote Control, On-Site Programming, Waveform Capture, Simulation Test, Fault Self-Diagnosis, Programmable Logic Control
Product Structure Modular Compact Design, Rugged Industrial Enclosure, Drawout Operation Prevents Dust Intrusion and Damage to Equipment
Processor Multi-Processor Architecture, Realizing High-Precision Measurement and High-Speed Fault Response
Current Input 1A Rated Value (P5), Connected to Standard CT, Suitable for Current Transformers with 1A Secondary Side, Supporting 3-Phase Current + Ground Current Input
Voltage Input Supporting 3-Phase Voltage Measurement, External PT Required, Adaptable to VT Inputs of Different Wiring Modes
Operating Power Supply (W2) 20-60VDC, 20-48VAC, Suitable for Low-Voltage Control Power Occasions
Control Power Supply (G5) 85-265VAC/DC, Wide Range Input, Strong Adaptability
Protection Functions Definite Time/Inverse Time Overcurrent Protection, Ground Fault Protection, Negative Sequence Overcurrent Protection, Thermal Overload Protection, Overexcitation Protection, Undervoltage Protection, Overvoltage Protection, Over/Under Frequency Protection
Analog Output 7 Programmable Sensor Output Channels, Supporting 4-20mA, 0-20mA Current Ranges
Digital I/O 16 Programmable Logic Inputs, Solid-State Output Maximum Rating 15A, 250VDC, Duration 500ms
Communication Protocols Supporting Modbus RTU Serial Communication, Optional IEC 61850 Protocol, Reserved Integration Expansion Capability
Communication Interfaces Standard RS232 (Front), RS485/RS422 (Rear) Interfaces, Optional Ethernet Interface
Response Time ≤1ms, Can Quickly Detect and Cut Off Fault Current
Operating Temperature Range -40℃ to +60℃
Storage Temperature Range -40℃ to +80℃
Relative Humidity 5% to 90%, Non-Condensing
Protection Class IP20 (Must Be Installed in Control Cabinet)
Vibration Complying with Strict Industrial Vibration Standards, Adaptable to Complex Vibration Environments in Industrial Sites
Shock Complying with Industrial Shock Standards, Having Good Shock Resistance
Physical Dimensions 21.6cm×25.4cm×24.1cm (8.5in×10.0in×9.5in), Adaptable to Standard Panel Opening Mounting
Physical Weight Approximately 7.5kg
Mounting Method Panel Mounting, Supporting Drawout Operation, Terminals Arranged Reasonably, Facilitating Wiring and Maintenance
Operation Interface Equipped with Enhanced LCD Display and Front Panel Programming Keyboard, Supporting Local Parameter Configuration, Status Viewing and Fault Query
Diagnostic Function Built-in Complete Fault Self-Diagnosis Module, Enabling Fault Recording, Sequence of Events Recording, Waveform Capture, Supporting Fault Data Tracing and Analysis, Quickly Locating Fault Causes
Product Material Industrial-Grade High-Strength Reinforced Enclosure, Conformal Coated PCB, High-Temperature Resistant Insulation Material, Built-in Anti-Electromagnetic Interference, Anti-Corrosion and Anti-Dust Protection Components
Special Functions Supporting Simulation Test Mode, Can Test Relay Function Before Connecting to Transformer; Built-in Electric Energy Metering Function, Reducing Additional Metering Equipment Costs; Supporting Transformer Life Loss Assessment, Can Monitor Transformer Insulation Life; Configuration, Monitoring and Data Recording Can Be Completed Through EnerVista 745 Software, Simplifying Full-Life Cycle Management
Product Performance
GE SR745-W2-P5-G5-HI is an original GE device with extremely strong adaptability, which can be perfectly adapted to various sizes of power transformers, feeders and busbars, seamlessly integrated into industrial automation systems, power monitoring systems and various power distribution networks, no additional adaptation components required, greatly reducing system integration complexity and commissioning costs, and can be used as the primary and backup protection device for transformers. The product has excellent protection and monitoring performance, adopts multi-processor architecture and high-precision measurement technology, with response time ≤1ms, which can quickly capture various faults and trigger protection actions in a timely manner, fully covering various risks during transformer operation, avoiding equipment damage and system collapse. At the same time, it has harmonic monitoring, total harmonic distortion monitoring and transformer life loss assessment functions, providing data support for equipment operation and maintenance. The product has outstanding reliability, adopts industrial-grade high-quality components and conformal coated PCB design, has excellent anti-electromagnetic interference and anti-vibration impact capabilities, can adapt to harsh industrial scenarios such as dust, temperature-humidity fluctuations and complex electromagnetic environments, and the wide operating temperature range of -40℃ to +60℃ can ensure continuous and stable operation in various harsh industrial environments with a long mean time between failures. The product is convenient for operation and maintenance, the modular design and drawout operation facilitate installation, maintenance and fault replacement, the front panel LCD display can intuitively view operation parameters and fault information, and remote configuration, monitoring and fault diagnosis can be realized through EnerVista 745 software, greatly improving operation and maintenance efficiency, providing stable, efficient and reliable transformer protection support for power systems, industrial enterprise power distribution networks and other scenarios.
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