Siemens SENTRON 3WA1 Manual page 32

Description
2.2 Circuit breakers and non-automatic circuit breakers
Rated-current coding
Guide frames and withdrawable circuit breakers are equipped with a rated-current
coding as standard.
Rated-current coding ensures that only those circuit breakers whose guide frames are
designed for the circuit breakers can be inserted into the guide frame.
(1)
(2)
(3)
(4)
(5)
Shutter
(1)
(2)
(3)
(4)
The shutter is used for touch protection. It consists of molded-plastic plates and covers
the live main circuit in the guide frame.
The sliding covers of the shutter close over the contacts of the guide frame in the
movement positions "TEST" and "DISCONNECT". Thus the isolation condition is already
fulfilled in the movement position "TEST".
30
Guide frame, left inner side (right inner side accordingly)
Coding pin on the racking rail in the guide frame
Racking rail
Withdrawable circuit breaker, right side (left side correspondingly)
Coding pin on withdrawable circuit breaker
Top sliding cover
Shutter lever (in center position)
Bottom sliding cover
Shutter actuator
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06