Siemens SENTRON VL Series System Manual page 282

Glossary
Position indicator
This indicates the position of the circuit breaker (disconnected/test/operating position) in the
guide frame.
Position signaling switch
This is used for remotely displaying the circuit breaker position in the guide frame.
Rated current coding
The rated current is coded in the factory, that is, each circuit breaker can only be used in a
guide frame with the same rated current.
Remote resetting
Using the optional remote reset solenoid, the electrical signal of the tripped signaling switch
and the reset button are reset.
Safe OFF
This additional function prevents the circuit breaker from closing and fulfills the isolation
condition in the OFF position to IEC 60947-2:
● "Mechanical OFF" button pressed
● Main contacts open
● Withdrawable circuit breakers: racking handle removed
● The various interlocking conditions are fulfilled
Shunt release (F1, F2)
For remotely opening the circuit breaker and blocking it against closing.
Switching position signaling switch
This auxiliary switch is actuated depending on the switching status of the circuit breaker.
Undervoltage release (delayed)
For remotely opening and interlocking the circuit breaker. Voltage dips must not cause the
circuit breaker to open.
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3WL/3VL circuit breakers with communication capability - PROFIBUS
System Manual, 03/2011, A5E01051353-02