1MRS751802-MUM
REX 521
141
Protection Relay
Technical Reference Manual, Standard Configurations
The status-indication signals are also routed from the digital inputs to the circuit
breaker function (I<->O CB1) via the input signal selectors. These settings can be
found in:
Main menu\Configuration\Input Signals\
, where the
different input signal names are displayed and the specific inputs selected. The
status-indication signals are named as “CB pos. open” and “CB pos. close”.
Using the HMI:
To change the settings for “CB pos. open” go to the
Configuration\Input
Signals\
and scroll with the [
↑
] or [
↓
] navigation push button to “CB pos. open”
and press the [E]-button. The different digital inputs are displayed one at a time by
selecting with the [
↑
] or [
↓
] navigation push button. Select DI1 and press the [E]-
button to confirm. Scroll to the “CB pos. close” and select the DI2 input.
Using Relay Setting Tool:
To change the settings for the
CB pos. open
go to the
Configuration/
Input Signals
and find
CB pos. open
. Select DI1 in the pull-down menu.
For more information, refer to
Tools for Relays and Terminals, User’s Guide
(see
Section 1.5. Related documents).
Fig. 9.1.4.2.-1 Selecting the digital input for the status indication of the breaker in
the Relay Setting Tool
In this application example the open and close push buttons are connected to the
digital inputs DI7 and DI8. Normally these buttons are connected directly to the
open or close circuits of the breaker. By including these to the relay, it is possible to
monitor the whole opening and closing time of the breaker and it is also possible to
define the pulse width for the open and close pulse. The manual opening and closing
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