Siemens SIPROTEC 7RW80 Manual page 135

Blocking by Protection
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.
Device Status Check (set = actual)
For switching commands, a check takes place whether the selected switching device is already in the set/de-
sired 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 Interlockings
Bypassing configured interlockings 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 user can switch between the modes „interlocked" (latched) or„ non-interlocked" (unlatched) in the op-
erator panel after entering the password or using CFC 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
request must be sent for the unlocking. The unlocking applies only for one switching operation and for
commands caused by the same source.
– Job order: command to object "Switching mode REMOTE", ON
– Job order: switching command to "switching device"
• Command via CFC (automatic command, SC=Auto SICAM):
– Behavior configured in the CFC block ("BOOL to command").
SIPROTEC, 7RW80, Manual
C53000-G1140-C233-1, Release date 10.2010
Functions
2.13 Breaker Control
135