Siemens SENTRON 3VA1, Руководство пользователя

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Accessories
4.13 Escutcheon
3VA molded case circuit breakers with IEC certificate
528
Manual, 03/2019, A5E03603177010-03
4.13 Escutcheon
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.
Cover frames are installed in cases where the gap size needs to be minimized and the gaps
covered. The use of cover frames makes for a clean-lined, attractive panel front face and
provides a higher degree of protection (IP30).
4.13.1 Product description
Cover frames are available for the following items of equipment from the 3VA product range:
● 3VA1 / 3VA2 molded case circuit breakers, 3-pole or 4-pole: Handle area only
● 3VA1 / 3VA2 molded case circuit breakers, 3-pole or 4-pole: Area around handle and trip unit
● Front mounted rotary operator
● Motor operators
● Loadside residual current devices, 3-pole or 4-pole
● Door feedthroughs