# SEL-487E Transformer Protection Relay

> transformer-protection - Transformer differential protection for multiwinding transformers, autotransformers and shunt reactors with synchrophasors

**Voltformer canonical:** https://voltformer.com/product/sel-487e-transformer-protection-relay - markdown version: https://voltformer.com/product/sel-487e-transformer-protection-relay.md

## Overview

- **Brand:** SEL
- **Product family:** SEL-400 Series
- **Application:** Transformer differential protection for multiwinding transformers, autotransformers and shunt reactors with synchrophasors
- **Product type:** transformer-protection

## Protection & Control Functions

- **ANSI Functions:** 87T, 87N/REF, 49, 50/51, 21, 24, 50BF
- **Transformer Windings:** 2, 3, 4, 5, 6, 7
- **Supports Transformer:** Yes
- **Supports Feeder:** Yes
- **Supports Breaker Control:** Yes
- **Arc Flash Protection:** No

## Digital Integration & Protocols

- **IEC 61850 Edition:** Ed2.1
- **GOOSE:** Yes
- **Sampled Values (SV):** Yes
- **Redundancy (PRP/HSR):** Yes (PRP/HSR)
- **Protocols:** IEC 61850 Ed. 2.1, DNP3, IEEE C37.118, PTPv2
- **Engineering Software:** acSELerator QuickSet

## Electrical Interface

- **Frequency:** 50/60 Hz
- **Nominal Current:** 1 A / 5 A
- **Auxiliary Supply:** 24–48 / 48–125 / 125–250 Vdc options
- **Operating Temperature:** -40 to +85 °C

## Standards

- IEC 60255
- IEC 61850-9-2
- IEC 61869-9
- IEEE C37.118

## Sources

- https://selinc.com/products/487E/
- https://selinc.com/products/487E/specs/

- **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.