Siemens 3VA1 100 A Manual page 223

In addition to the status information listed above, the position of the molded case circuit
breaker in the draw-out unit can also be transferred. For this purpose, the molded case
circuit breaker and the draw-out socket must be equipped with the communications interface
for the draw-out unit. This kit allows the position of the molded case circuit breaker in the
draw-out unit to be picked up and transferred to the COM060 communication module and
from there to the higher-level communication network. For further information about the
communication kit for draw-out units, please refer to chapter Communications interface for
draw-out unit (Page 230).
Operation through the cubicle door
The molded case circuit breaker can be optionally installed in the cubicle in such a way that
the breaker can be operated even when the cubicle door is closed. Draw-out versions of
molded case circuit breakers can then be switched on or off when the cubicle door is not
open. This is made possible by a cutout in the cubicle door which allows access to the main
control elements, i.e the handle and the <PUSH TO TRIP> button of the molded case circuit
breaker, but prohibits access to other live components inside the cubicle. This solution is
referred to as a "door feedthrough".
Door feedthroughs are mounted on the front of the molded case circuit breaker and securely
attached to the breaker by means of two bolts and a latch.
The door cutout must be positioned such that it is flush with the door feedthrough. It must
also be positioned in such a way as to minimize the size of the gap between the feedthrough
walls and the cutout. An escutcheon can be fitted as well in order to obtain an optimum
finish.
An opening in the cubicle through which the crank handle can be inserted must be provided
in addition to the cutout for the door feedthrough.
With its straight sides, the door feedthrough is designed to allow the molded case circuit
breaker to be moved through positions DISCON, TEST and CONNECT, while at the same
time providing a permanently tight seal around the feedthrough area (degree of protection
IP30) and preventing access to live components inside the cubicle.
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02
4.4 Plug-in and draw-out technology
Accessories
223