1. Description
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,
Modbus
®
and DNP3. Profibus DPV1 communication protocol is
supported by using the protocol converter SPA-ZC 302.
2. Standard configurations
RED615 is available in five alternative standard configurations.
The standard signal configuration can be altered by means of
the signal matrix or the graphical application functionality of the
Protection and Control IED Manager PCM600. Further, the
application configuration functionality of PCM600 supports the
creation of multi-layer logic functions utilizing various logical
elements including timers and flip-flops. By combining
protection functions with logic function blocks the relay
configuration can be adapted to user specific application
requirements.
The relay is delivered from the factory with default connections
described in the functional diagrams for binary inputs, binary
outputs, function-to-function connections and alarm LEDs.
Some of the supported functions in RED615 must be added
with the Application Configuration tool to be available in the
Signal Matrix tool and in the relay. The positive measuring
direction of directional protection functions is towards the
outgoing feeder.
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