Main components of the guide frame
① Mounting location of connection technology
② Racking handle
③ Pushbutton for unlocking racking (Push before Operating, to rack the circuit breaker positions
using the racking handle)
④ Hole for inserting the racking handle
⑤ Circuit breaker position indicator
⑥ Racking rail
⑦ Lower shutter
⑧ Upper shutter
⑨ Locking lever
Circuit breaker positions in the guide frame
Using the racking handle, the circuit breaker can be put in three dierent 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.
Description
2.8Basic unit
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Equipment Manual, 10/2023, L1V30499596002-03 33
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