The GE SR745-W2-P5-G5-HI is an advanced transformer protection relay, belonging to GE Multilin 745 transformer protection system series. As a core component for power transformer protection and monitoring, it is specifically designed to safeguard power transformers, auto-transformers and reactors, minimizing strain on transformer elements and extending equipment service life. It integrates comprehensive protection functions, precise monitoring capabilities and flexible communication, widely applied in power systems, industrial plants and utility facilities to ensure safe and stable operation of critical electrical assets.
Technical Parameters & Specifications
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Item
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Specifications
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Product Model
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SR745-W2-P5-G5-HI
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Product Type
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Transformer Protection Relay, GE Multilin 745 Series
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Manufacturer
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General Electric (GE), GE Multilin; managed by GE Vernova
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Power Supply
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90–300 VDC; 70–265 VAC, 48–62 Hz; optional 24 VDC (20.4–28.8 VDC)
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Current Input
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5 A phase current input per winding; 5 A ground current input; variable current input range based on configuration
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Voltage Input
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60–120 V relay input; compatible with 380V ±10% (three-phase four-wire) power systems
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RTD Configuration
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3-wire RTD support; compatible with 100Ω nickel, 120Ω nickel, 100Ω platinum RTD types
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Input/Output
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16 logic inputs; 7 sensor output channels (programmable current ranges: 4–20 mA, 0–20 mA); analog outputs (max load: 10kΩ at 0–1mA, 600Ω at 4–20mA)
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Communication Interfaces
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Front RS232, rear RS485/RS422; supports Modbus, Profibus, Ethernet/IP, CANopen; optional Ethernet (for models with “T” in model number)
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Processing Performance
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Multi-processor architecture; processing speed up to 1 GHz; response time ≤1ms for fault detection
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Memory
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Up to 1 GB RAM; 4 GB flash storage
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Operating Temperature
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-40°C to +70°C (-40°F to +158°F), adaptable to harsh industrial working environments
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Storage Temperature
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-40°C to +85°C (-40°F to +185°F), ensuring stable storage in extreme temperature conditions
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Relative Humidity
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5% – 90% (non-condensing), preventing moisture damage to internal components
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Protection Rating
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IP40 (front panel), IP20 (rear panel), dustproof and suitable for indoor control panel installation
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Mounting Type
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19-inch standard panel mount, easy to integrate into industrial control systems
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Dimensions (L×W×H)
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Approx. 229mm × 178mm × 181mm (9″ × 7″ × 7⅛”), standard size for easy installation
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Net Weight
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Approx. 4.8kg (10.6lbs), robust design ensuring structural stability
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Certifications
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CE, UL compliant, meeting international industrial safety and protection standards
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Additional Features
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40-character enhanced LCD display; programmable setpoints; built-in metering; overexcitation protection; harmonic monitoring; fault waveform playback; compatible with EnerVista 745 software
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GE SR745-W2-P5-G5-HI
Product Features
The GE SR745-W2-P5-G5-HI integrates comprehensive protection, high reliability and flexible configuration, perfectly meeting the core needs of transformer protection and industrial system integration:
1. Comprehensive Transformer Protection: Equipped with overexcitation, overload, ground fault, over/under frequency and restricted ground fault protection functions, it quickly detects faults and cuts off circuits to avoid transformer damage.
2. High Precision & Responsiveness: Adopts advanced digital signal processing technology and multi-processor architecture, with fast fault response (≤1ms) and precise measurement, ensuring accurate monitoring of transformer operating status.
3. Flexible Configuration & Compatibility: Highly configurable setpoints, support for multiple RTD types and modular I/O configurations, compatible with various transformer sizes and industrial control systems.
4. Reliable & Durable: Adopts industrial-grade components and rugged construction, with strong anti-electromagnetic interference capability, conformal coating option for enhanced protection in harsh environments.
5. User-Friendly & Cost-Effective: 40-character LCD display and intuitive operation interface facilitate parameter setting and troubleshooting; built-in metering reduces the need for additional equipment, lowering system costs.
Other GE Similar Models
In addition to the GE SR745-W2-P5-G5-HI, GE provides a series of high-quality transformer and industrial protection relays to adapt to different application scenarios:
1. GE SR745-W2-P5-G5-HI-A: Enhanced version with conformal coating, extended communication options and enhanced data logging capacity, suitable for harsh industrial environments.
2. GE 745-W2-P5-G5-HI-A-R-E-H: GE Multilin 745 series transformer protection relay with restricted ground fault option and enhanced display, ideal for complex transformer protection systems.
3. GE 489-Generator Protection Relay: Specialized for generator protection, compatible with SR745 series, suitable for power generation system protection.
4. GE 735-Feeder Protection Relay: Feeder protection relay from GE SR family, providing reliable feeder protection for power distribution systems.
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