Application - ABB RELION RED670 Series Product Manual

Line differential protection RED670 2.2
Product version: 2.2

1. Application

The Intelligent Electronic Device (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.
ABB
Out of Step function is available to separate power system
M13635-3 v7
sections close to electrical centre at occurring out of step.
The IED can be used in applications with IEC/UCA
61850-9-2LE process bus with up to eight merging units (MU)
depending on the other functionality included in the IED. Each
MU has eight analog channels, four currents and four
voltages. Conventional and Merging Unit channels can be
mixed freely in the application.
Forcing of binary inputs and outputs is a convenient way to
test wiring in substations as well as testing configuration logic
in the IEDs. Basically it means that all binary inputs and
outputs on the IED I/O modules (BOM, BIM, IOM & SOM) can
be forced to arbitrary values.
Central Account Management is an authentication
infrastructure that offers a secure solution for enforcing
access control to IEDs and other systems within a substation.
This incorporates management of user accounts, roles and
certificates and the distribution of such, a procedure
completely transparent to the user.
Flexible Product Naming allows the customer to use an IED-
vendor independent IEC 61850 model of the IED. This
customer model will be used as the IEC 61850 data model,
but all other aspects of the IED will remain unchanged (e.g.,
names on the local HMI and names in the tools). This offers
significant flexibility to adapt the IED to the customers'
system and standard solution.
The logic is prepared with a graphical tool. The advanced
logic capability allows special applications such as automatic
opening of disconnectors in multi-breaker arrangements,
closing of breaker rings, load transfer logics etc. The
graphical configuration tool ensures simple and fast testing
and commissioning.
A loop testing function allows complete testing including
remote end IED when local IED is set in test mode.
Communication via optical connections ensures immunity
against disturbances.
Four packages have been defined for the following
applications:
• Single breaker, 1/3 phase tripping, 2-3 line ends (A42)
• Multi breaker, 1/3 phase tripping, 2-5 line ends (B33)
• Multi breaker, 1/3 phase tripping, 2-3 line ends (B42)
• Single breaker, 1/3 phase tripping, with distance
protection (C42)
Optional functions are not configured but a maximum
configuration with all optional functions are available as
template in the application configuration tool. Analog inputs
and binary input/output signals are pre-defined for basic use.
Other signals may be required by each particular application.
1MRK 505 379-BEN C
Issued: March 2018
Revision: C
M11788-3 v10
SEMOD51220-5 v14
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