Siemens Sentron 3VA Manual page 250

Accessories
4.4 Plug-in and draw-out technology
Signal "Plug-in unit - MCCB correctly bolted to plug-in socket"
This option is provided for plug-in units only. Depending on the socket size, up to two
position signaling switches can be installed in slot No. 46.
①
②
③
④
With this application, the position signaling switches indicate whether the molded case circuit
breaker is inserted in the plug-in socket and secured by at least one screw. The reason for
this application is that the molded case circuit breaker needs to be secured in position by
mounting screws in the plug-in socket. All four mounting screws of the complete kit for
draw-out technology must be used for this purpose.
248
Slot 46 for position signaling switch of the plug-in socket
Slot 46 for position signaling switch of the plug-in socket
Mechanical system for actuation of position signaling switches when the bolt is tightened
Bolt hole which determines the signal output by the position signaling switches
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01