# ABB Relion REU615 Voltage & Frequency Protection IED

> feeder-protection - Dedicated voltage and frequency protection, automatic load shedding, synchrocheck and generator/interconnection decoupling for distribution grids

**Voltformer canonical:** https://voltformer.com/product/abb-relion-reu615-voltage-frequency-protection-ied - markdown version: https://voltformer.com/product/abb-relion-reu615-voltage-frequency-protection-ied.md

## Overview

- **Brand:** ABB
- **Product family:** Relion 615 Series
- **Application:** Dedicated voltage and frequency protection, automatic load shedding, synchrocheck and generator/interconnection decoupling for distribution grids
- **Product type:** feeder-protection

## Protection & Control Functions

- **ANSI Functions:** 50/51, 50N/51N, 27/59, 81, 25, 50BF
- **Transformer Windings:** N/A (Feeder / Bay)
- **Supports Transformer:** No
- **Supports Feeder:** Yes
- **Supports Breaker Control:** Yes
- **Arc Flash Protection:** Yes

## Digital Integration & Protocols

- **IEC 61850 Edition:** Ed2
- **GOOSE:** Yes
- **Sampled Values (SV):** Yes
- **Redundancy (PRP/HSR):** Yes (PRP/HSR)
- **Protocols:** IEC 61850, Modbus TCP, DNP3, IEC 60870-5-103
- **Engineering Software:** PCM600

## Electrical Interface

- **Frequency:** 50/60 Hz
- **Nominal Current:** 1 A / 5 A
- **Auxiliary Supply:** 48-250 Vdc / 100-240 Vac
- **Operating Temperature:** -25 to +55 °C

## Standards

- IEC 60255
- IEC 61850

## Sources

- https://new.abb.com/medium-voltage/digital-substations/protection-relays/voltage-protection-and-control/voltage-protection-and-control-reu615-iec

- **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.