Additional Components For Residual Current Operated Circuit Breakers; Remote Controlled Operating Mechanism (Rc) - Siemens SENTRON Instructions Manual

Residual current protective devices
4.5

Additional components for residual current operated circuit breakers

4.5.1 Remote-controlled operating mechanism (RC)
Favored locations for remote-controlled operating mechanisms are spacious or not
continually manned work areas, such as watertreatment plants or radio stations as
well as automated plants for energy and operations management.
The use of a remote-controlled operating mechanism allows the user direct and
immediate access to the installation even in remote or hard-to-access locations.
Fast reconnection to the supply following a fault, in particular, saves consider-
able time and costs. The remote-controlled operating mechanism is controlled
by means of a mechanical function selection switch. In the "OFF" position, the
remote-controlled mechanism is disabled and can also be closed.
"RC OFF" prevents remote switching and allows only manual actuation of the
RCCB. This prevents unauthorized remote switching during service assignments,
for instance. In the „RC ON" position, "Remote ON" and "Remote OFF" switching as
well as local operation are possible. If a fault trip occurs, the connected handles
on the RCCB and the remote-controlled operating mechanism are set to the „OFF"
position. The circuit breaker must only be reclosed if the hazardous situation no
longer exists. To reclose the breaker, the operator must also acknowledge dis-
connection of the supply with a RESET (OFF command) for the remote-controlled
operating mechanism.
Figure 14: Remote-controlled operating mechanism with RCCB
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