GE Multilin 745-W2-P5-G5-LO-A-L-R-E Transformer Protection Relay

Overview

The GE Multilin 745-W2-P5-G5-LO-A-L-R-E is a transformer protection relay. It offers advanced protection and monitoring for power transformers of all sizes. You can use it for two-winding and three-winding configurations. With its modular, draw-out design, it simplifies maintenance and reduces downtime. The relay also supports multiple communication protocols for easy integration into SCADA and automation systems.

Technical Specifications

Protection and Control

• Application: Two-winding and three-winding transformer protection

• Protection Modes: Primary and backup protection

• Frequency: 50 Hz / 60 Hz (selectable)

• Nominal Current: 1A or 5A (selectable per CT input)

Power Supply

• LO Option:

• DC: 40–60 VDC

• AC: 20–48 VAC, 48–62 Hz

Communication Interfaces

• Protocols: Modbus, DNP 3.0 Level 2

• Ports:

• Embedded Ethernet

• RS232, RS485, RS422 serial ports

Digital and Analog I/O

• Digital Inputs: Opto-isolated, quantity per G5 option

• Digital Outputs: Relay or solid-state, quantity per G5 option

• Analog Outputs (A option):

• Types: 0–1 mA, 0–5 mA, 0–20 mA, 4–20 mA

• Quantity: Typically 4 or more (user-configurable)

Voltage Inputs

• Nominal Voltage: Up to 120V AC

Environmental Ratings

• Operating Temperature: -40°C to +80°C

• Storage Temperature: -40°C to +85°C

• Humidity: Optional conformal coating for corrosive environments

Mechanical

• Mounting Options: Rack or panel mount

• Construction: Modular, draw-out style