# GE Multilin 745 Transformer Management Relay

> transformer-protection - Three-winding transformer differential, restricted earth fault (REF), harmonic restraint, overexcitation and loss of life monitoring

**Voltformer canonical:** https://voltformer.com/product/ge-multilin-745-transformer-management-relay - markdown version: https://voltformer.com/product/ge-multilin-745-transformer-management-relay.md

## Overview

- **Brand:** GE Vernova
- **Product family:** Multilin SR Series
- **Application:** Three-winding transformer differential, restricted earth fault (REF), harmonic restraint, overexcitation and loss of life monitoring
- **Product type:** transformer-protection

## Protection & Control Functions

- **ANSI Functions:** 87T, REF/87N, 49, 50/51, 50N/51N, 24, 50BF
- **Transformer Windings:** 2, 3
- **Supports Transformer:** Yes
- **Supports Feeder:** No
- **Supports Breaker Control:** Yes
- **Arc Flash Protection:** No

## Digital Integration & Protocols

- **IEC 61850 Edition:** Ed1
- **GOOSE:** Yes
- **Sampled Values (SV):** No
- **Redundancy (PRP/HSR):** No / Optional
- **Protocols:** Modbus RTU/TCP, DNP3
- **Engineering Software:** EnerVista 745 Setup

## Electrical Interface

- **Frequency:** 50/60 Hz
- **Nominal Current:** 1 A / 5 A
- **Auxiliary Supply:** 90-300 Vdc / 70-265 Vac
- **Operating Temperature:** -40 to +60 °C

## Standards

- IEC 60255
- IEEE C37.90

## Sources

- https://www.gevernova.com

- **Source scope:** manufacturer-family
- **Last reviewed:** 2026-09-13

Manufacturer portfolio/family source. Confirm the exact order code, guaranteed ratings and project-specific options against the current OEM datasheet before procurement or an SLD study.

Technical ratings are configuration-dependent where stated by the manufacturer. Request project-specific verification before procurement.