Accessories
4.13 Cover frame
3VA molded case circuit breakers with UL and IEC certification
378 Manual, 01/2019, L1V30435333-01
Molded case circuit breakers or supplementary motor operators or front mounted rotary
operators for molded case circuit breakers are often installed in panels or distribution boards
in such a way that only the operating device is directly accessible. Busbars, cables and the
termination area of the molded case circuit breaker are covered by metal or plastic plates in
order to prevent direct contact with live components. The panel door itself is often designed
as a protective cover.
Cutouts must be made in these covers
● in order to allow access to control elements,
● which are designed to prevent direct contact with cables, and
● which are large enough in size that the cover can be closed easily.
All these requirements necessitate gap dimensions of a few millimeters between the cutout
and the unit.
Door cover frames are used when the gap is to be covered and and as small as possible.
With cover frames you achieve a clean, attractive panel appearance in the front view as well
as a higher degree of protection of IP30 in IEC applications.
Cover frames are generally available for the following devices of the 3VA UL product range:
● 3VA5 / 3VA6 molded case circuit breakers, 3- or 4-pole: Handle area only
● 3VA5 / 3VA6 molded case circuit breakers, 3- or 4-pole: Area around handle and trip unit
● Front mounted rotary operator
● Motor operators
● Door feedthroughs
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