Accessories
4.4 Plug-in and draw-out technology
3VA molded case circuit breakers with UL and IEC certification
242
Manual, 01/2019, L1V30435333-01
Integration of molded case circuit breaker position signal into a communication network
By means of the COM100 and COM800 breaker data servers, various statuses of multiple
molded case circuit breakers can be queried and passed on by bus systems. This includes
messages such as "Breaker tripped", "Breaker on", "Breaker off", reason for tripping, etc.
Depending on the version of the 3VA UL molded case circuit breaker, actual current and
voltage measurements can also be passed on. To provide this communications capability,
the molded case circuit breaker itself is equipped with a COM060 communication module
which functions as the breaker's actual communication link.
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 draw-out frame must be equipped with the "Communication link for
draw-out unit" (3VA9977-0KC00). 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 249).
Operation through the panel door
The molded case circuit breaker can be optionally installed in the panel in such a way that
the breaker can be operated even when the panel door is closed. Draw-out versions of
molded case circuit breakers can then be switched on or off when the panel door is not
open. This is made possible by a cutout in the panel 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 panel. 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
