Section 2 RED615 overview
2.1 Overview
RED615 is a phase-segregated two-end line differential protection and control relay
designed for utility and industrial power systems, including radial, looped and meshed
distribution networks with or without distributed power generation. RED615 is also
designed for the protection of line differential applications with a transformer within
the protection zone. RED615 relays communicate between substations over a fiber
optic link or a galvanic pilot wire connection. RED615 is a member of ABB’s Relion
®
product family and part of its 615 protection and control product series. The 615 series
relays are characterized by their compactness and withdrawable-unit design. Re-
engineered from the ground up, the 615 series has been guided by the IEC 61850
standard for communication and interoperability of substation automation equipment.
The relay provides unit type main protection for overhead lines and cable feeders in
distribution networks. The relay also features current-based protection functions for
remote back-up for down-stream protection relays and local back-up for the line
differential main protection. Further, standard configurations B and C also include
earth-fault protection. Standard configurations D and E include directional
overcurrent and voltage based protection functions.
The relay is adapted for the protection of overhead line and cable feeders in isolated
neutral, resistance earthed, compensated (impedance earthed) and solidly earthed
networks. Once the relay has been given the application-specific settings, it can
directly be put into service.
The 615 series relays support a range of communication protocols including IEC
61850 with Edition 2 support, process bus according to IEC 61850-9-2 LE, IEC
60870-5-103 and Modbus
®
. Profibus DPV1 communication protocol is supported by
using the protocol converter SPA-ZC 302.
1MRS758127 C Section 2
RED615 overview
RED615 13
Application Manual
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