Section 2 Application; General Ied Application - ABB REL670 2.2 IEC Applications Manual

1MRK 506 369-UEN B
Section 2
2.1
Line distance protection REL670 2.2 IEC
Application manual
Application

General IED application

The Intelligent Electronic Device (IED) is used for the protection, control and
monitoring of overhead lines and cables in solidly, impedance earthed or isolated
networks. The IED can be used up to the high voltage levels. It is suitable for the
protection of heavily loaded lines and multi-terminal lines where the requirement
for tripping is one-, two- and/or three-phase. The IED is also suitable as back-up
protection of power transformers, reactors and so on.
Distance protection with quadrilateral or mho characteristics is available. The full
scheme distance protection provides protection of power lines with high sensitivity
and low requirement on remote end communication. The six zones have fully
independent measuring and setting which gives high flexibility for all types of
lines. Load encroachment and adaptive reach compensation are included.
The modern technical solution offers fast operating time of typically less than one
cycle.
The IED also includes an alternative for use on impedance earthed or isolated
networks. It includes phase preference logic to select and trip only one line at
cross-country faults.
The autorecloser for single-, two-, and/or three-phase tripping and autoreclosing
includes priority features for multi-breaker arrangements. It co-operates with the
synchrocheck function with high-speed or delayed reclosing.
A high impedance differential protection can be used to protect T-feeders or line
reactors.
High set instantaneous phase and earth overcurrent, four step directional or non-
directional delayed phase and earth overcurrent, sensitive earth fault for not direct
earthed systems, thermal overload and two step under and overvoltage protection
are examples of the available functions allowing the user to fulfill any application
requirement.
The distance phase and earth fault protection, and the directional earth overcurrent
protection can communicate with remote end in any teleprotection communication
scheme. With the included remote communication, following the IEEE C37.94
standard, up to 192 channels for intertrip and binary signals are available per
LDCM communication module in the communication between the IEDs.
Section 2
Application
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