1MRS751802-MUM
REX 521
169
Protection Relay
Technical Reference Manual, Standard Configurations
To make the initiation by the trip signal:
1. Go to the Shot 1 setting, select
Initiation mode
as “Trip”.
2. Select
AR1 oper. mode
as “Init Shot”.
3. Set the first
Dead time
as the requirements.
The Shot 2 and the ongoing shots are made in the same way.
The open signal from the auto-recloser is connected as the trip directly to the HSPO1
and the close signal is connected to the same output signal as the close signal from
the circuit breaker function. The reclose signal is depended on the interlocking
method chosen for closing of the breaker. If the trip is activated during the close-
pulse period, the close signal is deactivated.
Alarms and action signals are available as three different signals from the auto-
recloser. The signals can be found in
Main menu\Configuration\Output
SWGRP\
and are named as O->I ACTIVE, O->I Alarm 1 and O->I Alarm 2.
Refer to the CD-ROM Technical Descriptions of Functions for more information
about the auto-reclosing function.
9.4.4.
Protection signal routing
The settings for the protection signal routing can be implemented as described in the
first application example (see Section 9.1. Outgoing feeder, Basic B01).
9.4.5.
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 to free
the digital inputs for other functionality. Local control can be executed via the HMI
according to the instructions in
REX 521 Operator’s Manual
(see Section 1.5.
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