2.Indication And Control Connections - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
11.6.4.2.
198
Protection Relay
Technical Reference Manual, Standard Configurations
The trip signal (Trip 2) of the underfrequency stage f< protection function is routed
to the power output PO2 (x4.2.14/15).
The trip signals (Trip 3) of the residual voltage stages Uo>>> and Uo>>,
undervoltage, overvoltage and underfrequency stage f<< protection function are
routed to the power output PO3 (x4.2.17/18).
The trip signals from the protection functions are routed to the output relay via the
output switchgroups. These settings can be found in
Main menu\Configuration\Output SWGRP\.
As the HSPO1 is always named as the "Trip 1" output signal, the settings are made
directly in Main menu\Configuration\Output SWGRP\Trip 1 where
the checksum of the settings is displayed (255 by default).
The Trip 2 has to be set to PO2 and the Trip 3 to PO3 in
Main menu\Configuration\Output Signals\. The trip signals from the
protection functions can be set to the correct trip group in
Main menu\Configuration\Output SWGRP\Trip 2...3 where the
checksum of the settings is displayed (255 by default).
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To change the settings for Trip 1 go to Output SWGRP\Trip 1 and press the
[E]-button. The different protection functions are displayed one at a time. By
pressing the [→] or [←] navigation push button, it is possible to scroll between the
different protections. By pressing the [↑] or [↓] navigation push button, the specific
protection function trip signal can be connected or disconnected.
To change the settings for PO2 and PO3 go to Output Signals\PO2...PO3 and
press the [E]-button. The different signals (Trip 2, Trip 3, CBFP, etc.) are displayed
one at a time. By pressing the [→] or [←] navigation push button, it is possible to
scroll between the different signals. By pressing the [↑] or [↓] navigation push
button, the specific signal can be selected. Select the Trip 2 for the PO2 and Trip 3
for the PO3.
To define settings for Trip 2 and Trip 3 the same principle as shown above for the
Trip1 can be used.
When the residual voltage stages Uo>>> and Uo>> are selected the checksum for
Trip 1 is 384.
When the underfrequency protection stage f< is selected for the load shedding group
1, the checksum for Trip 2 is 512.
When the residual voltage stages Uo>>> and Uo>>, two-stage overvoltage (U> and
U>>), two-stage undervoltage (U< and U<<) and underfrequency protection stage
f<< are selected the checksum for Trip 3 is 2492.
Indication and control connections
All the necessary settings for the alarm signals and indication signals of the
disconnector for the measurement cubicle can be set as described in the first
application example on page 104 onwards for the outgoing. The settings are made
by means of the Relay Setting Tool or the local HMI. The settings can be found in:
Main menu\Configuration\Input Signals\
1MRS 751802-MUM