Locking, Blocking And Interlocking - Siemens Sentron 3VA Manual

Accessories
4.5 Manual operators
4.5.4.7

Locking, blocking and interlocking

The following accessories for locking, blocking and interlocking are used:
● Locking at the handle
● Locking at the masking plate of the panel door
● Locking, blocking and interlocking at the rotary operator
Locking at the handle
The rotary operator can be locked at the handle with up to three padlocks with a diameter of
3/16" to 5/16" / 5 mm to 8 mm. Padlocks are not included in the scope of supply.
Lockable positions:
● Position OFF (O)
Locking the door mounted rotary operator in OFF (O) position prevents the molded case
circuit breaker from being switched on and the panel door from being opened. The door
interlock cannot be overridden.
● Position ON (I)
Possible only if the front mounted rotary operator has been modified according to the
operating instructions.
Note
No impairment of protection function
Locking the rotary operators in the ON (I) position does not impair the protection function of
the molded case circuit breakers. In the event of a fault, the molded case circuit breaker trips
in the normal way.
When the rotary operator is unlocked, the position changes to TRIP.
278
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01