Siemens Sentron 3VA Manual page 224

Accessories
4.4 Plug-in and draw-out technology
Draw-out technology
As with plug-in technology, with draw-out technology, the 3VA UL molded case circuit
breaker is equipped with plug-in contacts for the main circuits. In addition, side walls
including guide and retaining studs are screwed onto the side of the molded case circuit
breakers.
In this case, the mating contacts are in the draw-out socket. This is also equipped with a
guide mechanism via which the molded case circuit breaker is moved into the draw-out
socket by means of a crank handle in order to connect the breaker to the main circuits. The
operator can clearly read from a position indicator whether the breaker is properly connected
to the main circuits or is 100% safely isolated from them (so that it can be withdrawn).
Cable connection
With plug-in and draw-out circuit breakers, the cables or busbars are connected to the plug-
in socket or the draw-out socket. Here, the termination areas are implemented in the same
way as for the molded case circuit breaker. That is, all the connection technology available
for the 3VA UL molded case circuit breaker is also available in a similar way for the plug-in
and draw-out sockets.
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3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01