# NR Electric PCS-931 Line Differential Protection IED

> feeder-protection - Ultra-high voltage and high-voltage transmission line current differential, distance protection, synchrocheck and auto-reclosing

**Voltformer canonical:** https://voltformer.com/product/nr-electric-pcs-931-line-differential-protection-ied - markdown version: https://voltformer.com/product/nr-electric-pcs-931-line-differential-protection-ied.md

## Overview

- **Brand:** NR Electric
- **Product family:** PCS-9000 Series
- **Application:** Ultra-high voltage and high-voltage transmission line current differential, distance protection, synchrocheck and auto-reclosing
- **Product type:** feeder-protection

## Protection & Control Functions

- **ANSI Functions:** 87L, 21/21N, 50/51, 50N/51N, 67/67N, 50BF, 25, 79
- **Transformer Windings:** N/A (Feeder / Bay)
- **Supports Transformer:** No
- **Supports Feeder:** Yes
- **Supports Breaker Control:** Yes
- **Arc Flash Protection:** No

## Digital Integration & Protocols

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

## Electrical Interface

- **Frequency:** 50/60 Hz
- **Nominal Current:** 1 A / 5 A
- **Auxiliary Supply:** 110-250 Vdc
- **Operating Temperature:** -25 to +55 °C

## Standards

- IEC 60255
- IEC 61850
- IEEE C37.90

## Sources

- https://www.nrec.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.