ABB REX 521, Техническое справочное руководство, стандартные конфигурации

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1MRS751802-MUM Protection Relay
Technical Reference Manual, Standard Configurations
REX 521
11.2.4.2. Indication and control connections
The connections for indication and control can be implemented as described in the
first application example (see Section 9.1. Outgoing feeder, Basic B01), except the
signals for the open and close buttons that in this example are disconnected. Local
control can be executed via HMI according to the instructions in
REX 521
Operator’s Manual (see Section 1.5. Related documents).
11.2.5. Implementations
In the sections below a few implementation examples for the standard configuration
H02 are presented.
11.2.5.1. Blocking signal received from the outgoing feeder and the bus
sectionalizer
The start signals from the overcurrent protection of the outgoing feeder and bus
sectionalizer can be connected in order to block the overcurrent protection stage on
the incoming feeder. There are two input blocking signals, Blocking 1 and Blocking
2, which can have different functions depending on the different protections. See
Fig. 11.2.5.1.-1.
On the overcurrent stages 3I>->, 3I> and 3I>>, the Blocking 1 input signal is
connected to the BS1 input and the Blocking 2 input signal is connected to the BS2
input of the function. In this application example, the BS1 will stop the DT or IDTM
timer and the BS2 will block the trip signal. Refer to the CD-ROM
Technical
Descriptions of Functions
(see Section 1.5. Related documents) for more
information about the different protection function blocks.
In this application example the digital input DI9 is connected to the input signal
Blocking 1 and then routed to the BS1 input of the overcurrent stage 3I>>. The
Blocking 1 signal can be found in
Main menu\Configuration\Input
Signals\Blocking 1\
where DI9 is selected. The checksum for the
switchgroup in
Main menu\Configuration\Input SWGRP\Blocking 1\
should be 8
to the block 3I>>.