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Switching Mode
(for devices without
operator panel)
Zone Controlled /
Field Interlocking
System Interlock-
ing
Double Activation
Blockage
Blocking by Protec-
tion
Device Status
Check (set = actual)
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
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 (component: BOOL to command).
The dongle cable sets the switching mode of the device to "Normal". The specifica-
tions of the previous section apply.
Zone controlled / field interlocking (e.g. via CFC) includes the verification that prede-
termined switchgear position 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 switchgear 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 indi-
cation (marking), or
• by means of a control logic via CFC.
When a switching command is initiated, the actual status is scanned cyclically. The as-
signment is done via "Release object CLOSE/OPEN".
Substation Controller (System interlocking) involves switchgear conditions of other
bays evaluated by a central control system.
Parallel switching operations are interlocked. As soon as the command has arrived all
command objects subject to the interlocking are checked to know whether a command
is being processed. While the command is being executed, interlocking is enabled for
other commands.
The pickup of protective elements blocks switching operations. Protective elements
are configured, separately for each switching component, to block specific switching
commands sent in CLOSE and TRIP direction.
When enabled, "Block CLOSE commands" blocks CLOSE commands, whereas
"Block TRIP commands" blocks TRIP signals. Switching operations in progress will
immediately be aborted by the pickup of a protective element.
For switching commands, a check takes place whether the selected switching device
is already in the set/desired position (set/actual comparison). This means, if a circuit
breaker is already in the CLOSED position and an attempt is made to issue a closing
command, the command will be refused, with the operating message "set condition
equals actual condition". If the circuit breaker/switchgear device is in the intermediate
position, then this check is not performed.
2.25 Breaker Control
360
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