Section 2
Application
2.1
General IED application
M13635-3 v6
The IED is used for the protection, control and monitoring of overhead lines and cables in all
types of networks. The IED can be used from distribution up to the highest 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 for
protection of cable feeders to generator block transformers.
The phase segregated current differential protection provides an excellent sensitivity for high
resistive faults and gives a secure phase selection. The availability of six stabilized current
inputs per phase allows use on multi-breaker arrangements in three terminal applications or
up to five terminal applications with single breaker arrangements. The communication
between the IEDs involved in the differential scheme is based on the IEEE C37.94 standard and
can be duplicated for important installations when required for redundancy reasons. Charging
current compensation allows high sensitivity also on long overhead lines and cables.
A full scheme distance protection is included to provide independent protection in parallel
with the differential scheme in case of a communication channel failure for the differential
scheme. The distance protection then provide protection for the entire line including the
remote end back up capability either in case of a communications failure or via use of an
independent communication channel to provide a fully redundant scheme of protection (that
is a second main protection scheme). Eight channels for intertrip and other binary signals are
available in the communication between the IEDs.
A high impedance differential protection can be used to protect T-feeders or line reactors.
The auto-reclose for single-, two- and/or three phase reclosing includes priority circuits for
multi-breaker arrangements. It co-operates with the synchronism check function with high-
speed or delayed reclosing.
High set instantaneous phase and earth overcurrent, four step directional or un-directional
delayed phase and earth overcurrent, thermal overload and two step under- and overvoltage
functions are examples of the available functions allowing the user to fulfill any application
requirement.
The IED can also be provided with a full control and interlocking functionality including co-
operation with the synchronism check function to allow integration of the main or back-up
control.
Disturbance recording and fault locator are available to allow independent post-fault analysis
after primary disturbances. The Disturbance recorder will also show remote station currents,
as received to this IED, time compensated with measure communication time.
Out of Step function is available to separate power system sections close to electrical centre
at occurring out of step.
The IED can be used in applications with IEC 61850-9-2LE process bus with up to six merging
units (MU) depending on other functionality included in the IED.
Each MU has eight analogue channels, normally four currents and four voltages. Conventional
and Merging Unit channels can be mixed freely in the application.
1MRK 505 343-UEN B
Section 2
Application
35
Application manual
Содержание Relion 670 series
Страница 1: ...RELION 670 SERIES Line differential protection RED670 Version 2 1 IEC Application manual...
Страница 2: ......
Страница 40: ...34...
Страница 64: ...58...
Страница 150: ...144...
Страница 406: ...400...
Страница 472: ...466...
Страница 494: ...488...
Страница 512: ...506...
Страница 524: ...518...
Страница 604: ...598...
Страница 686: ...680...
Страница 718: ...712...
Страница 722: ...716...
Страница 758: ...752...
Страница 759: ...753...