GE Multilin 745-W3-P5-G5-HI-E Transformer Management Relay

Product Brief Description

GE Multilin 745-W3-P5-G5-HI-E is a high-speed draw-out transformer protection and management relay for 2-winding or 3-winding power transformers. It provides differential main protection plus a full suite of backup protection, metering, fault recording and automation logic. This model is equipped with Ethernet communication, 5A CT input, standard HMI and conformal coating option. The 745 series is discontinued by GE Vernova, the recommended replacement is the 845 relay series.

Features

• Core protection: 87T percentage differential with adaptive harmonic restraint to avoid false trip during transformer inrush, restricted earth fault 64REF, overfluxing V/Hz, phase/ground instantaneous & time overcurrent 50/51, thermal overload 49 protection
• Built-in power metering: 3-phase voltage, current, power, power factor, harmonics and THD measurement
• FlexLogic programmable logic, up to 4 groups of setting groups for different operation modes
• Event records, oscillography waveform capture, through-fault current tracking for transformer asset management
• Communication: Ethernet, RS232, RS485, support Modbus, DNP3.0 Level 2; IRIG-B time synchronization
• 16 digital logic inputs, multiple relay trip/output contacts, draw-out pluggable design for quick replacement
• Configuration software: EnerVista 745 Setup software for parameter setting and commissioning

Application Scenarios

• Power substation main transformer, distribution transformer primary protection
• Oil & gas, mining, steel, chemical plant internal power grid transformers
• Marine power station and large industrial self-use power system transformers
• Substation automation system integration, SCADA remote monitoring
• Legacy GE Multilin 745 system retrofit, spare replacement project

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