Breaker Control; Types Of Commands - Siemens SIPROTEC 7SJ62 Instruction Manual

6.20

Breaker Control

General
Operation Using
the keypad on the
local user interface
Operation using
®
DIGSI 4
Operation using the
SCADA Interface

6.20.1 Types of Commands

Control Commands
7SJ62 Manual
C53000-G1140-C121-1
In addition to the protective functions described thus far, a Control command process
is integrated in the SIPROTEC
and other equipment in the power system. Control commands can originate from four
command sources:
− Local operation using the keypad on the local user interface of the device
− Local or remote operation using DIGSI
− Remote operation using the SCADA Interface (via IEC, Profibus)
− Automatic functions (e.g., using a binary input)
The device supports the operation of circuit breakers/switchgear. The number of
switchgear devices to be controlled is, basically, limited by the number of binary inputs
and outputs present. High security against inadvertent device operations can be en-
sured if interlocking checks are enabled. A standard set of optional interlocking checks
is provided for each command issued to circuit breakers/switchgear.
Control ommands can be initiated using the keypad on the local user interface of the
relay (see also Section 7.3 - System Control). Using the navigation keys
, the &21752/ menu can be accessed and the circuit breaker/switchgear to be op-
erated can be selected. After entering a password, a new window is displayed in which
multiple control actions (close, open, cancel) are available and can be selected using
the and keys. Next a security check takes place. After the security check is
completed, the key must be pressed again to carry out the command. If the
ENTER
key is not pressed within one minute, the selection is cancelled. Cancellation via the
key is possible at any time before the control command is issued.
ESC
If the attempted command fails, because an interlocking condition is not met, then an
error message appears in the display. The message indicates why the control com-
mand was not accepted (see also Subsection 7.3.7). This message must be acknowl-
edged with before any further control commands can be issued.
ENTER
The procedure for issuing control commands using the DIGSI
in Section 7.3 (Control of Switchgear).
Commands can be issued remotely via the SCADA interface as well. Please check
MLFB order number to ensure that your individual relay has a SCADA interface mod-
ule that supports this. Please refer to specific protocol documents for a complete list
of supported commands (see Section 5.6).
Two (2) types of commands can be processed within the device:
− Control commands
− Internal / pseudo commands
Control commands operate (OPEN/CLOSE) binary outputs. Examples are:
®
7SJ62 to coordinate the operation of circuit breakers
®
4
Functions
, , ,
ENTER
®
4 program is described
6-175