2 Functions
230
7UM61 Manual
C53000-G1176-C127-3
Interlocking conditions can be programmed separately 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 command".
System Interlock-
ing
Substation Controller (System interlocking) involves switchgear conditions of other
bays evaluated by a central control system.
Double Activation
Blockage
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.
Blocking by Protec-
tion
Protection functions then block switching operations. Protective elements are config-
ured, 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.
Device Status
Check (set = actual)
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.
Bypassing Inter-
locking
Bypassing configured interlocks at the time of the switching action happens device-
internal via interlocking recognition in the command job or globally via so-called
switching modes.
• SC=LOCAL
– The switch modes "interlocked" or "non-interlocked" (de-interlocked) can be
switched over for the 7UM61 in the operator control panel after password entry.
• REMOTE and DIGSI
®
– Commands issued by SICAM
®
or DIGSI
®
are unlocked via a global switching
mode REMOTE. A separate job order must be sent for the unlocking. The unlock-
ing applies only for one
switching operation and for command caused by the
same source.
– Job order: command to object "Switching mode REMOTE", ON
– Job order: switching command to "switching device"
• Derived commands via CFC (automatic command, SC=Auto):
– Behaviour configured in the CFC block ("BOOL to command").
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