Siemens 3VA1 100 A Manual page 216

Accessories
4.4 Plug-in and draw-out technology
Defined positions
● CONNECT position: The molded case circuit breaker is connected to the main circuits.
The auxiliary circuits are also electrically connected to the installation via the auxiliary
circuit connectors.
This is the normal operating position of the molded case circuit breaker.
● TEST position: The main circuits are not connected to the installation. The auxiliary
circuits are connected to the installation via auxiliary circuit connectors.
The auxiliary circuits can be function-tested with the breaker in the TEST position even
when the installation itself is not live.
● DISCON position: Neither the main circuits nor the auxiliary circuits are connected to the
installation.
The molded case circuit breaker is electrically isolated.
If the molded case circuit breaker is not in any of these defined positions, the switching
position indicator displays the word UNBLOCK on a white background. When the breaker is
in this position, its main contacts cannot be closed if the autotrip plunger is correctly installed
(see below).
Move the molded case circuit breaker into a defined position
Note
If the switch position indication is CONNECT, TEST or DISCON, the sliding clutch of the
crank gear is engaged and rotation of the crank handle has no effect.
By removing and reinserting the crank handle, it is possible to disengage the gear. The
switching position indicator will then show UNBLOCK. The molded case circuit breaker can
now be moved to a new position.
1. If the crank handle is inserted in the crankcase, pull it out.
2. Insert the crank handle into the crankcase again.
By removing and reinserting the crank handle, it is possible to disengage the gear.
3. Turn the crank handle until the switching position indicator shows the required position.
Remove the molded case circuit breaker
1. Move the molded case circuit breaker into the DISCON position.
The molded case circuit breaker is electrically isolated.
2. To disengage the lock, press the safety lock slide underneath the switching position
indicator downwards as indicated by the arrow.
3. Remove the molded case circuit breaker.
216
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02