Locking Provision To Prevent Unauthorized Closing Of The Withdrawable Circuit Breaker; Description - Siemens SENTRON 3WA1 Manual

Accessories
4.8 Accessories for protection against unauthorized operation
4.8.6 Locking provision to prevent unauthorized closing of the withdrawable
circuit breaker
4.8.6.1

Description

This locking provision uses a safety lock to securely lock the withdrawable circuit
breaker in the open state (e.g. during service calls and inspections). Closing is not
possible either locally or remotely.
The conditions for switch disconnectors in the OPEN position are fulfilled according to
IEC60947-2.
Note
As the mounting location is in the guide frame, closing is prevented independently of the
breaker in the case of withdrawable circuit breakers. Unauthorized closing remains
impossible even after the circuit breaker has been replaced.
The following locks are available for retrofitting:
• Made by CES
• Made by IKON
• Made by KIRK Key
• Made by Ronis
• Made by Profalux
The locking provision can be retrofit.
You will find more information in the operating instructions available on the internet
(https://support.industry.siemens.com/cs/ww/en/view/109783676).
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3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06