Protection Signal Routing; Indication And Control Connections; Implementations; Blocking Signal From The Mv Relay On The Secondary Side Of The Transformer - ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS 751802-MUM
9.3.3.3.
9.3.3.4.
9.3.4.
9.3.4.1.
Protection Relay
Technical Reference Manual, Standard Configurations
The signal from the inrush function is configured as an input signal to the standard
configuration and has to be routed to the overcurrent functions when taken into use.
The settings, for which overcurrent stage to double, are made in
Main menu\Input SWGRP\Double\.

Protection signal routing

The trip signal of the protection, Trip 1, is routed to the high speed power output
HSP01 (x4.2.1/2/3/4) as well as the control-open signal for the circuit breaker. The
trip signals from the protection functions are to be 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).
8VLQJ WKH +0,
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 [
protection function trip signal can be connected or disconnected. When the three-
stage overcurrent (3I> 3I>> and 3I>>>) is selected the checksum for Trip 1 is 7.

Indication and control connections

All the necessary settings for the indication and the control signals of the circuit
breaker and the disconnector for the incoming feeder can be set as described above
in the first application example page 104 onwards. 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\
Main menu\Configuration\Input SWGRP\
Main menu\Configuration\Output Signals\
Main menu\Configuration\Output SWGRP\.

Implementations

In the section below a few implementation examples for the standard configuration
B01 are presented.
Blocking signal from the MV relay on the secondary side of the
transformer
The start signal from the high-set overcurrent stage 3I>> of the MV relay (incoming
feeder) can be routed to the high-set stage 3I>> of the HV relay to block the
overcurrent protection stage. There are two input blocking signals, Blocking 1 and
Blocking 2, which can have different functions depending on the different
protections.
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. The BS1 in this application example will stop the DT or IDTM
↑ ↓
] or [ ] navigation push button, the specific
REX 521
131