GE Multilin SR745-W2-P1-G1-HI-E-H Transformer Management Relay

All products on this website are discounted products, and market prices have been fluctuating. Please refer to customer service quotes for details. Pictures are not actual photos. Before placing an order, please confirm the model, product, price, and other detailed information with customer service. Both second‑hand and brand new products are available for sale on this website. Please contact customer service for further communication.

Product Overview

GE Multilin SR745-W2-P1-G1-HI-E-H is a high-performance numerical transformer management relay within the SR745 series, built for full protection, metering, monitoring and control of two-winding power transformers in utility substations, power plants and heavy industrial power distribution systems.

Model suffix breakdown:

• SR745: Transformer management relay series
• W2: 2-winding transformer protection configuration
• P1: 1 Amp CT secondary current input
• G1: Integrated ground fault protection function
• HI: High wide-range auxiliary control power supply
• E: Enhanced large LCD front panel with upgraded keypad
• H: Harsh environment conformal coating for humidity, dust and chemical resistance

This relay adopts percentage differential protection with harmonic restraint to prevent false tripping caused by transformer magnetizing inrush current. It integrates overcurrent, overvoltage, undervoltage, overfrequency, underfrequency, thermal overload and restricted ground fault protection. It supports FlexLogic™ programmable logic, fault waveform capture, sequence of event recording and multi-protocol serial communication for SCADA and DCS integration. GE has discontinued the SR745 series. We supply surplus and fully refurbished SR745-W2-P1-G1-HI-E-H spare parts for legacy substation transformer cabinet maintenance, avoiding costly full system retrofit.

Key Features

✅ Percentage differential protection with adaptive harmonic restraint for two-winding power transformers ✅ P1 1A CT secondary input, compatible with 1A class current transformers widely used in power substations ✅ G1 integrated sensitive ground fault and restricted earth fault protection ✅ HI universal high-range control power supply: 70–265V AC / 90–300V DC ✅ E enhanced large LCD & keypad for improved local parameter setup and fault waveform review ✅ H conformal coating: specially coated PCB to withstand high humidity, dust, corrosive industrial atmospheres ✅ FlexLogic™ customizable programmable logic for site-specific transformer protection schemes ✅ Event recorder & oscillographic fault waveform capture for post-fault diagnostics ✅ Multi-port communication: RS232, RS485, Modbus RTU, DNP3.0, IRIG-B time synchronization ✅ CT ratio mismatch correction and transformer thermal overload monitoring

Technical Specifications

• Model: SR745-W2-P1-G1-HI-E-H
• Brand: GE Multilin / GE Vernova / GE Grid Solutions
• Product Family: SR745 Transformer Management Relay
• Transformer Winding: W2 (2-winding)
• CT Secondary Input: 1A (P1)
• Control Power (HI): 70–265V AC / 90–300V DC
• Display: E = Enhanced large LCD display
• Coating: H = Harsh environment conformal coating
• Protection: Percentage differential, restricted ground fault, overcurrent, over/under voltage, over/under frequency, thermal overload
• Communication: RS232, RS485, Modbus RTU, DNP3.0, IRIG-B time sync
• Mounting: Panel mount
• Operating Temperature: -40℃ ~ +70℃
• Humidity: 5% ~95% RH, non-condensing
• Protection Rating: Front IP54, rear IP30
• Certifications: CE, UL, IEC 60255

Applications

GE Multilin SR745-W2-P1-G1-HI-E-H relays are used for two-winding power transformer protection in harsh environments:

• Utility outdoor substations with high humidity and dust
• Power plant auxiliary step-down transformers
• Industrial large power distribution transformers
• Oil & gas plant main transformers with corrosive atmosphere
• Mining heavy industry power transformers
• Replacement spare parts for legacy GE SR745 transformer protection panels

Product Supply Information

We provide fully tested GE Multilin SR745-W2-P1-G1-HI-E-H transformer management relays for global power and automation buyers. The SR745 series is discontinued by GE. Available stock includes surplus and refurbished units.

• Complete functional, differential protection and communication testing before shipment
• 12-month warranty
• Anti-static packaging, secure export carton
• Shipping options: DHL, FedEx, UPS, sea freight
• Trade terms: EXW, FOB, CIF, DDP

FAQ

Q1: What does -W2-P1-G1-HI-E-H suffix mean?

A: W2=2-winding transformer; P1=1A CT secondary input; G1=ground fault protection; HI=high range control power; E=enhanced large LCD; H=harsh environment conformal coating.

Q2: Is discontinued?

A: Yes, GE Multilin has phased out the SR745 transformer relay series. We supply surplus and fully tested replacement units for legacy transformer protection systems maintenance.

Q3: What is the H option for SR745 relay?

A: H means conformal coating on PCB boards, designed for harsh environments with high humidity, dust, salt mist or light chemical vapor.

Q4: What is the core protection function of SR745 relay?

A: The core function is percentage differential protection with harmonic restraint, which identifies transformer internal faults and prevents misoperation during magnetizing inrush.

Q5: What is thference between and -W2-P1-G1-HI-A-L-R?

A: SR745-W2-P1-G1-HI-E-H has enhanced LCD and harsh environment coating, fixed panel mount; SR745-W2-P1-G1-HI-A-L-R comes with analog I/O, local display and drawout removable chassis.

GE BRAND

Recommended other models

GE Multilin SR489-P5-LO-A1 Generator Management Relay
GE Multilin SR489-P5-LO-A20 Generator Management Relay

Supplies industrial spare parts covering well‑known international brands: ABB, GE, Bently Nevada, Emerson, Honeywell, Schneider, EPRO, Yokogawa, Woodward, Foxboro and Invensys TRICONEX.

We maintain ample stock, offer fast lead times and deliver products with stable, reliable quality.

• ✅ ABB: PP846 HMI Touch Screen, 5SHY Series IGCT, PM Series Controllers, AI/DO I/O Modules, SP Series Bailey Modules
• ✅ GE: VMIC, IS200 & IS215 Series CPU and Modules
• ✅ Emerson: Control Modules, EPRO Probes
• ✅ Westinghouse: 1C Series Modules
• ✅ Honeywell: CC Series Modules
• ✅ Schneider: 140 Series Modules
• ✅ Triconex: Full Series Safety Instrumented System Modules
• ✅ Bently: 3500 Series Vibration Monitoring System
• ✅ Rexroth: Industrial Motors & Drives
• ✅ Foxboro: Compact Control Modules