Siemens SIPROTEC 4, User Manual

Page: 362 / 734

SC = Auto SICAM:
Commands that are initiated internally (command processing in the CFC) are not subject to switching
authority and are therefore always "allowed".
Switching Authority (for devices without operator panel)
The dongle cable sets the switching authority of the device to "REMOTE". The specifications of the previous
section apply.
Switching Mode (for devices with operator panel)
The switching mode determines whether selected interlocking conditions will be activated or deactivated at
the time of the switching operation.
The following switching modes (local) are defined:
•
Local commands (SC = LOCAL)
–
interlocked (normal), or
– non-interlocked switching.
The devices in housing of size 1 /
2
- or 1 /
1
are equipped with key switches on the front panel. The bottom switch
is reserved for switching mode. The "Normal" position allows interlocked switching while the "Interlocking
OFF" position allows non-interlocked switching. For devices in housing of size
1 /
3
the switching mode can be
changed between "interlocked (latched)" and "non-interlocked (unlatched)" in the operator panel after having
entered the password or by means of CFC also via binary input and function key.
The following switching modes (remote) are defined:
•
Remote or DIGSI commands (SC = LOCAL, REMOTE, or DIGSI)
–
interlocked, or
– non-interlocked switching. Here, deactivation of interlocking is accomplished via a separate
command. The position of the key-switch is irrelevant.
– For commands from CFC (SC = AUTO SICAM), please observe the notes in the CFC manual (compo-
nent: BOOL to command).
Switching Mode (for devices without operator panel)
The dongle cable sets the switching mode of the device to "Normal". The specifications of the previous section
apply.
Zone Controlled / Field Interlocking
Zone controlled / field interlocking (e.g. via CFC) includes the verification that predetermined switchgear posi-
tion conditions are satisfied to prevent switching errors (e.g. disconnector vs. ground switch, ground switch
only if no voltage applied) as well as verification of the state of other mechanical interlocking in the switch-
gear bay (e.g. High Voltage compartment doors).
Interlocking conditions can be programmed separately, for each switching device, for device control CLOSE
and/or OPEN.
The enable information with the data "switching device is interlocked (OFF/NV/FLT) or enabled (ON)" can be
set up,
•
directly, using a single point or double point indication, key-switch, or internal indication (marking), or
•
by means of a control logic via CFC.
When a switching command is initiated, the actual status is scanned cyclically. The assignment is done via
"Release object CLOSE/OPEN".
System Interlocking
Substation Controller (System interlocking) involves switchgear conditions of other bays evaluated by a central
control system.
Functions
2.27 Breaker Control
362 SIPROTEC 4, 7SJ62/64, Manual
C53000-G1140-C207-8, Edition 08.2016