GE 745-W2-P5-G5-HI-A-L-R-E-H Transformer Protection Relay | Multilin

Product Description

The GE 745-W2-P5-G5-HI-A-L-R-E-H is a high-performance transformer protection relay designed for medium and large power transformers. Part of the GE Multilin 745 series, this relay integrates advanced protection, control, metering, and communication in a single, compact device, providing reliable operation in utility substations, power plants, and industrial installations.

Technical Specifications

• Model: 745-W2-P5-G5-HI-A-L-R-E-H

• Manufacturer: General Electric (GE)

• Series: Multilin 745 Transformer Protection System

• Type: Digital Transformer Protection Relay

• Protection Functions: Differential, restricted earth fault (REF), overcurrent, thermal overload, overvoltage, undervoltage, frequency protection

• Current Inputs (CT): Configurable for 1 A or 5 A

• Voltage Inputs (PT): 100–120 V AC

• Auxiliary Power: 88–300 V DC / 85–265 V AC (HI range)

• Control Features: Breaker trip/close, programmable logic functions, remote control

• Metering: Current, voltage, power, frequency, harmonics

• Communication Interfaces: RS-232, RS-485, Ethernet (dependent on configuration)

• Supported Protocols: Modbus RTU/TCP, DNP3, IEC 61850 (configuration-dependent)

• Display: Large LCD with programmable mimic diagrams

• Event Recording: Sequence of Events (SOE) with millisecond resolution

• Oscillography: Fault waveform capture for detailed analysis

• Weight: 10 lbs

• Operating Temperature: -40 °C to +60 °C

Key Features

• Full transformer protection including differential and REF

• Integrated breaker management and bay control

• High-speed event recording with oscillography for fault diagnostics

• Advanced metering with harmonic analysis

• Flexible communication options for SCADA and substation automation

• User-friendly interface with programmable mimic diagrams

Typical Applications

• Utility substations: protection for medium and large transformers

• Power plants: ensuring reliable operation of critical transformers

• Industrial facilities: safeguarding essential transformer equipment

• Smart grids: integration with SCADA and automated control systems

FAQ

Q: What CT and PT ranges are supported?
A: The relay supports 1 A or 5 A CTs and 100–120 V AC PTs.

Q: Can it communicate with IEC 61850 systems?
A: Yes, IEC 61850 support is available depending on the configuration.

Q: What is the auxiliary power requirement?
A: 88–300 V DC or 85–265 V AC (HI range).

Q: Does it support event and fault recording?
A: Yes, it includes SOE with millisecond resolution and fault waveform capture.

Q: How does it differ from other 745 variants?
A: This configuration includes high-range auxiliary power, full differential and REF protection, and advanced communication interfaces.