GE

Product Background

The 745 series is GE Multilin’s classic comprehensive transformer protection system, widely adopted in utility and industrial power systemsGE Vernova. This specific model 745‑W2‑P5‑G5‑HI‑E is optimized for two‑winding power transformers. It integrates protection, metering, control, event recording and communication in one single unit, replacing multiple separate legacy relays. It adopts draw‑out plug‑in chassis design for easy maintenance and replacement without rewiring the cabinet wiringGE Vernova. GE has officially marked the 745 series as Discontinued (EOL); only original surplus stock, refurbished or aftermarket replacement units are available in spare‑parts market. The successor product is GE 845 relayGE Vernova. It is a complete standalone protection device, can be mounted on control panel directly.

GE Multilin 745‑W2‑P5‑G5‑HI‑E Transformer Management Relay

Main Functions

1. Comprehensive transformer protection elements
   • Percent differential protection with dual‑slope restraint and adaptive harmonic restraint, prevents false tripping during transformer magnetizing inrushstatic6.ar…
   • Restricted earth‑fault (REF), neutral / ground overcurrent protection
   • Over‑excitation (over‑flux) protection, over‑/under‑frequency protection, time‑delay overcurrent backup protectionMade-in-Ch…
   • On‑load tap‑changer monitoring and protection logicGE Vernova
2. Built‑in precision metering & condition monitoring Measure phase/ground currents, voltages, power, energy, THD total harmonic distortion, transformer loss‑of‑life calculation, temperature monitoring. Data can be trended and logged for asset health assessment.
3. Flexible logic control (FlexLogic™) PLC‑style programmable logic, supports custom interlock logic, control output for circuit breakers and auxiliary devices, with configurable digital inputs and relay outputsManualsLib.More products: www.plcva.com
4. Fault recording & disturbance analysis High‑speed waveform capture, event logger with millisecond time‑stamping, pre‑ and post‑fault data recording for post‑fault diagnosis; IRIG‑B time synchronization supportGE Vernova.
5. Multi‑protocol communication Supports Modbus‑RTU, DNP3.0 Level 2, Ethernet, RS232/485/422 serial ports. Upload protection status, metering data, fault logs to DCS/SCADA system for remote monitoring and parameter configurationGE Vernova.
6. Self‑diagnosis & security audit trail Continuous internal hardware self‑test; security audit log records all setting‑change operations for traceability; draw‑out chassis for fast maintenanceGE Vernova.
7. Wide‑range high‑power control supply (HI version) Accepts wide AC/DC control power input, suitable for diverse power‑system environments.

GE Multilin 745‑W2‑P5‑G5‑HI‑E Transformer Management Relay

Applications & Usage

This relay is used for primary and backup protection, monitoring and management of two‑winding power transformers and autotransformers. Typical application scenarios:

• Power plants, utility substations
• Petrochemical, metallurgy, mining, large‑scale industrial factories
• Water‑treatment plants, data‑centers, large‑scale commercial‑building power distribution systems
• Medium‑to‑large power transformers in industrial and utility power networks

Understand the lowest price, please contact via email: plcvarious@foxmail.com

More products: www.plcva.com

Many products are not yet on the shelves please contact us for more products.