Siemens SENTRON 3WL10 Manual page 37

Circuit breaker positions in the guide frame
Using the racking handle, the circuit breaker can be put in three different positions in the
guide frame:
● CONNECT:
The circuit breaker is connected to the main circuit. The auxiliary circuits are also closed.
● TEST:
In the TEST position, the main contacts of the circuit breaker are not connected to the
main circuit, only to the auxiliary circuit. This allows the functionality of the auxiliary circuit
and all of its components (auxiliary switches, auxiliary releases, communication, etc.) to
be tested when the main circuit is open.
● DISCON:
The circuit breaker is not connected to the main circuit nor to the auxiliary circuit. In the
DISCON (DISCONNECT) position, it can be removed from the guide frame.
The circuit breaker position is indicated below the hole for inserting the racking handle.
When the circuit breaker arrives at one of the positions during racking, it engages in this
position. Further racking is then only possible once the pushbutton for unlocking racking
(Push before Operating) has been pressed.
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
Description
2.7 Basic unit
35