Siemens SENTRON 3VA1, Руководство пользователя

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Accessories
4.4 Plug-in and draw-out technology
3VA molded case circuit breakers with IEC certificate
282
Manual, 03/2019, A5E03603177010-03
Auxiliary circuit connectors
Molded case circuit breakers or switch disconnectors in molded case circuit breaker design
are frequently equipped with internal accessories, e.g. with an auxiliary switch and auxiliary
release. A broad range of internal accessory components is also available for the 3VA
molded case circuit breaker. For further information, please refer to chapter Internal
accessories (Page 191).
To ensure that the electrical connections required by plug-in units can be quickly and safely
disconnected, auxiliary circuit connectors can be installed.
The part of the auxiliary circuit connectors on the circuit breaker side is mounted on the
underside of the molded case circuit breaker using the cable cages and is electrically
connected to the internal accessories. Appropriate openings and cable ducts are provided in
the molded case circuit breaker for routing stranded wires. The plug-in socket half of the
auxiliary circuit connector is inserted in the socket and electrically connected to the
customer's installation.
When the molded case circuit breaker is inserted into the plug-in socket, the internal
accessories in the breaker are quickly connected to the customer's installation without the
use of tools.
Note
Plug-in and draw-out units use different versions of the auxiliary circuit connector. The draw-
out version has a longer, movable telescopic rail because the distance to be bridged in the
draw-out socket is longer.
Further details about auxiliary circuit connectors can be found in chapter Auxiliary circuit
connector (Page 301).