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 Interlocking
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 switching modes "interlocked (latched)" or "non-interlocked (unlatched)" can be set in housing
sizes
1
/
2
(7VE63) via the key switch. The position "Interlocking OFF" corresponds to non-interlocked
switching and serves the special purpose of unlocking the standard interlocks. For devices in
housing of size
1
/
3
(7VE61) 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.
•
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 unlocking 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 command via CFC (automatic command, SC=Auto SICAM):
–
Behaviour configured in the CFC block ("BOOL to command").
Command Logging
During the processing of the commands, independent of the further message routing and processing,
command and process feedback information are sent to the message processing centre. These messages
contain information on the cause. With the corresponding allocation (configuration) these messages are
entered in the event list, thus serving as a report.
Prerequisites
A listing of possible operating messages and their meaning as well as the command types needed for tripping
and closing of the switchgear or for raising and lowering of transformer taps are described in the SIPROTEC 4
System Description.
Functional Description
Acknowledgement of Commands to the Device Front
All messages with the source of command LOCAL are transformed into a corresponding response and shown
in the display of the device.
Acknowledgement of commands to Local / Remote / Digsi
The acknowledgement of messages with source of command Local/ Remote/DIGSI are sent back to the
initiating point independent of the routing (configuration on the serial digital interface).
2.15.5
2.15.5.1
Functions
2.15 Command Processing
140
SIPROTEC 4, 7VE61 and 7VE63, Manual
C53000-G1176-C163-3, Edition 10.2017
Summary of Contents for SIPROTEC 4 7VE61
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