RED615 Line differential protection relay

Description

Overview

Essential details：RED615 Line differential protection relay

RED615 is a phase-segregated, two-end, line differential protection and control relay for protection, control, measurement and supervision of overhead line and cable feeders in utility and industrial power distribution networks, including radial, looped and meshed distribution networks, with or without distributed generation. RED615 is also ideal for line differential applications with an in-zone transformer. RED615 relays communicate between substations either over a fiber-optic link or a galvanic pilot wire connection.

Compact and versatile solution for utility and industrial power distribution systems with integration of protection, control, monitoring and supervision in one relay.

RED615 is a member of ABB’s Relion^® product family and part of its 615 protection and control series of relays.
Scope

• Feeder protection including communicating two-end line differential

Product benefits

• Selective unit protection as phase-segregated two-end line differential protection, either with sensors or conventional instrument transformers
• Ready-made standard configurations, including line differential communication, for fast and easy setup with tailoring capabilities
• Withdrawable plug-in unit design for swift installation and testing
• Large graphical display for showing customizable SLDs, accessible either locally or through an easy-to-use web-browser-based HMI
• Extensive life-cycle services

Product features

• Line differential protection with directional or non-directional overcurrent and earth-fault protection, voltage- and frequency-based protection and measurement functionality
• Line differential communication between substations either over a fiber-optic link or a galvanic pilot wire connection; ideal for line differential applications with an in-zone transformer
• Optional advanced and fast fault location of short circuits and earth faults
• Supports IEC 61850 Editions 1 and 2, including HSR and PRP, GOOSE messaging and IEC 61850-9-2 LE for less wiring and supervised communication
• IEEE 1588 V2 for high-accuracy time synchronization and maximum benefit of substation-level Ethernet communication
• Supports Modbus, DNP3 and IEC 60870-5-103 communication protocols

RED615

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RED615 Line differential protection relay

RED615 line differential protection and measurement and control device is a split-phase, double-ended line differential protection and measurement and control device designed for public and industrial distribution systems. It perfectly coordinates overhead lines and cable feeders for public and industrial distribution networks, including systems with distributed generators.

RED615 features support for the substation IEC61850 communication standard, covering vertical and horizontal communication, GOOSE messages with switching signals and analog signals, and fixed setting based on IEC 61850-8-1. In addition, RED615 supports Modbus®, DNP3, and IEC 60870-5-103 protocols.

The RED615 line differential Protection and measurement and control unit provides two-phase line differential protection, overcurrent protection, negative sequence overcurrent protection and circuit breaker failure protection. According to different standard configurations, the RED615 can also expand the thermal load protection, directional or non-directional grounding protection, sensitive grounding protection, phase break protection, intermittent grounding protection, negative sequence overvoltage protection and multiple automatic reclosing functions in addition to the basic functions for the protection of overhead feeders.

In addition, the admittance ground protection can effectively reduce the influence of fault transition resistance, improve sensitivity and ensure the correctness of direction judgment. The differential protection function of the line includes ratio brake section and quick acting section. For example, when the current transformer is saturated, the ratio brake section provides sensitive differential protection and maintains stability during operation. In the power transformer outside the region, the second harmonic suppression ratio can be used for the brake section action, and the quick acting section provides fast action in the case of serious regional faults.

Overall, the RED615 line differential protection and measurement and control device is a protection, control, monitoring and management solution integrated in a single relay protection device, providing a compact and universal solution for public and industrial distribution systems. For more information, it is recommended to visit the manufacturer’s official website or consult a professional technical engineer.