ABB RED670 1MRK002810-AB Line Differential Protection Relay

Product Description

Overview

The ABB RED670 (1MRK002810-AB) is a high-performance intelligent electronic device (IED) engineered for line differential protection and bay control in transmission and sub-transmission networks. Part of the Relion® 670 series, this relay ensures fast, precise fault detection and reliable system operation under complex network conditions. Its advanced multi-terminal differential logic allows selective fault isolation, maintaining grid stability during disturbances.

Key Features

• Phase-Segregated Differential Protection: Independently monitors each phase, enabling secure single-pole tripping and automatic reclosing for maximum system availability.

• High Sensitivity: Detects high-impedance earth faults that conventional relays might overlook.

• Multi-Terminal Support: Handles up to five line ends with fiber-optic or galvanic communication links.

• Integrated Bay Control: Provides remote control of breakers and disconnectors, synchro-check, and energizing checks.

• Optional Backup Distance Protection: Offers secondary defense in case of communication loss between terminals.

• Fault Location: Precisely calculates fault positions on protected lines to reduce downtime.

• Advanced Communication: Supports IEC 61850 (Edition 1 & 2), DNP3, Modbus, and IEC 60870-5-103 protocols. Echo-timing synchronization ensures accurate time alignment even without GPS.

Technical Specifications

Applications

• Overhead transmission lines

• Underground cables

• Electrical substations

• Complex multi-terminal protection schemes

FAQ

Q: Can the RED670 support five-line terminals?
A: Yes, it can protect up to five line ends simultaneously using either fiber-optic or galvanic links.

Q: Does it provide fault location information?
A: Yes, the relay calculates precise fault positions on protected lines, aiding faster maintenance.

Q: Is it compatible with modern digital substations?
A: Fully. The device supports IEC 61850 Edition 1 & 2 for seamless integration.

Q: Can it detect high-impedance earth faults?
A: Yes, the phase-segregated differential logic is highly sensitive to detect even challenging fault types.