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Ge 745-W2-P5-G5-HI-A
The GE SR745-W2-P5-G5-HI-A is a high-performance integrated relay protection device belonging to General Electric’s (GE) Multilin series. It is specially designed for the protection and monitoring of transformers and large-scale motors. Integrated with cutting-edge digital signal processing technology and flexible communication interfaces, this device delivers a reliable, accurate and easy-to-manage power system protection solution.
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1. Technical Specifications
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Parameter
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Specification
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Notes
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|---|---|---|
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Rated Voltage
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380V ±10% (Three-phase Four-wire)
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Applicable to medium and high-voltage distribution networks
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Current Measurement Range
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0 to 1000A
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Input via rated current transformers (CT)
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Operating Temperature
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-40°C to +60°C
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Adaptable to harsh industrial environments
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Storage Temperature
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-40°C to +80°C
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Suitable for long-term storage
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Ambient Humidity
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< 95% (Non-condensing)
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Applicable to high-humidity environments
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Protection Grade
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IP40 (Front Panel) / IP20 (Rear Panel)
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Dustproof and waterproof design
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Communication Interfaces
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Modbus, IEC 61850, RS-485, RS-232
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Compatible with various upper computers and SCADA systems
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Display Screen
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40-character LCD Screen
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Intuitively displays parameters and fault information
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Dimensions
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230mm x 160mm x 50mm (Approx. 9.06 x 6.30 x 1.97 inches)
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Compact structure
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Weight
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Approx. 1.8kg (Approx. 4.0 lbs)
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Lightweight and easy to install
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2. Product Features
- High Precision and Reliability: Adopting advanced digital signal processing technology and microprocessors, it realizes high-precision measurement and ultra-fast response, capable of detecting and cutting off fault currents within 1 millisecond to ensure stable operation of power equipment.
- Multi-Functional Protection: Built-in comprehensive protection functions including differential protection, overload protection, overheating protection, ground fault protection and harmonic overvoltage protection, fully meeting the safety requirements of transformers under diverse operating conditions.
- Flexible Communication Compatibility: Supports multiple mainstream communication protocols such as Modbus, IEC 61850, RS-485 and RS-232, enabling seamless integration with upper-level monitoring systems and multi-relay networks for efficient data transmission.
- Easy Installation and Maintenance: Designed for DIN rail mounting or panel mounting with standardized wiring terminals, reducing the demand for auxiliary components. The waterproof design of optical components also lowers the frequency of routine maintenance.
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3. Structure and Composition
- Input/Output Module: Covers current transformer (CT) inputs, analog outputs (4-20mA), Form A relay outputs and digital communication ports, realizing stable signal transmission and control output.
- Control Unit: Equipped with a built-in microprocessor and supporting software (such as EnerVista 745), responsible for core logical calculation, fault judgment and instruction execution.
- Display and Operation Panel: Configured with an LCD screen and dedicated keypad, allowing operators to directly view operating parameters and conduct on-site parameter adjustment and setting.
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4. Application Fields
- Power System: Applied to the protection and real-time monitoring of large generators, transformers and power grid nodes, safeguarding the stable operation of the power grid.
- Industrial Automation: Protects industrial motors and critical electrical equipment, effectively preventing unplanned downtime caused by electrical faults and reducing production losses.
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5. Installation and Maintenance Recommendations
- Installation Method: DIN rail mounting is recommended to ensure sufficient ventilation space; avoid excessive stacking of equipment around to prevent heat accumulation.
- Environmental Requirements: Do not install the device in environments with high-concentration corrosive gases; keep ventilation ports unobstructed to maintain a suitable operating temperature.
- Communication Configuration: Configure IP addresses and relevant communication parameters rationally according to the on-site communication network (Modbus/TCP or IEC 61850), so as to ensure accurate and stable data transmission.
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