Siemens SENTRON 3WL10 - Page 117

Protective covers to prevent unintended mechanical operation
With this protective device, the circuit breaker can be protected from unintended operation.
It is mounted on the safety cover of the circuit breaker.
The pushbutton protection device prevents operation of the OFF and ON button unless the
special key is used.
This protective cover cannot be combined with the locking provision for padlocking.
Locking provision, OFF position, Ronis lock
They are locked by a Ronis cylinder lock, which is installed in the operator panel. With
this, the circuit breaker can be locked in the OPEN position. The cover of the accessories
compartment can be removed when locked to enable maintenance work in this area.
The locks have the same lock number irrespective of the number of circuit breakers used.
Each of the keys thus 󹪝ts in each of the lockable circuit breakers. Other locks with the same
lock number can be ordered from Ronis (Ronis pin tumbler lock 1351-10A).
The protective device with a key prevents access to the OFF button and the ON button
simultaneously. It is not possible to push both buttons. Access is only possible with the
relevant key.
This locking provision ful󹪝lls the conditions for a supply disconnecting (isolating) device
according to EN60204‑1.
A Ronis cylinder lock is included in the scope of delivery.
Interlocking set for mechanical ON / OFF
With this version, one or both buttons can optionally be protected from being operated. If
only one button is protected, the other button can be operated.
• Locking provision made of plastic for up to three padlocks with a diameter of 4mm (0.16")
• Locking provision made of metal for one padlock with a diameter of 7mm (0.28") or for a
padlock holder
• Locking provision made of metal for up to 2 padlocks with a diameter of 8mm (0.32")
Locking provision, OFF position, for padlocking
The circuit breaker can be locked in the OPEN position with padlocks. It is therefore safety
locked, for example, for service and inspection work.
The two hinged covers can always be moved independently of each other and thus locked
individually.
Three di󹪜erent locking provisions can be supplied for padlocks:
• Locking provision made of plastic for up to three padlocks with a diameter of 4mm (0.16")
• Locking provision made of metal for one padlock with a diameter of 7mm (0.28") or for a
padlock holder
• Locking provision made of metal for up to 2 padlocks with a diameter of 8mm (0.32")
This locking provision ful󹪝lls the conditions for a supply disconnecting (isolating) device
according to EN60204‑1.
The locking provision for padlocks can be used as an alternative for the protective cover
against unintended mechanical operation or as an alternative to the interlocking set for
Accessories
3.5External accessories
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
116 Equipment Manual, 10/2023, L1V30499596002-03