Protection Signal Routing; Indication And Control Connections - ABB REX 521 Technical Reference Manual, Standard Configurations

REX 521
9.4.4.
9.4.5.
140
Protection Relay
Technical Reference Manual, Standard Configurations
• go to the Shot 1 setting, select "Initiation mode" as "Trip",
• select "AR1 oper. mode" as "Init Shot" and
• 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 0->1 ACTIVE, 0->1 Alarm 1 and 0->1 Alarm 2.
Please refer to the CD-ROM Technical Descriptions of Functions for more
information about the auto-reclosing function.

Protection signal routing

The settings for the protection signal routing can be implemented as described in the
first application example (chapter 9.1.).

Indication and control connections

The connections for indication and control can be implemented as described in the
first application example (chapter 9.1.), 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 Operator's Manual (1MRS 751107-MUM).
1MRS 751802-MUM