Accessories
4.4 Plug-in and draw-out technology
3VA molded case circuit breakers with IEC certificate
294 Manual, 03/2019, A5E03603177010-03
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. A cover frame can be fitted as well in order to obtain an optimum finish.
An opening in the panel 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 panel.
Markings are visible on the door feedthrough to help the user identify the current position of
the molded case circuit breaker as it is moved into or out of the panel. Since mounting
dimensions may vary slightly, however, these markings should be regarded as a rough guide
only. The crank handle mechanism provides the user with feedback information about the
molded case circuit breaker position, e.g. whether it has been correctly inserted.
Benefits of draw-out technology
● Defective molded case circuit breakers can be replaced quickly and easily
● Clear visual evidence of safe electrical isolation of main circuits
● Molded case circuit breaker and accessories can be function-tested in the TEST position
● Remote signaling of molded case circuit breaker positions CONNECT, TEST and
DISCON
● Padlocks and / or cylinder locks can be used to lock draw-out unit so that the molded
case circuit breaker cannot be inserted or removed by unauthorized persons
● Molded case circuit breaker can be operated through the panel door
● Degree of protection IP20 at all termination points
● No grounding required
Locking and interlocking (Page 360)
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