Accessories
4.4 Plug-in and draw-out technology
3VA molded case circuit breakers with IEC certificate
278 Manual, 03/2019, A5E03603177010-03
Plug-in technology
4.4.5.1
Product description
Applications
The plug-in versions of 3VA molded case circuit breakers are designed for use in complex
applications for which speedy replacement of molded case circuit breakers is a basic
requirement. Plug-in technology can be used, for example, when clear visual evidence of
safe electrical isolation of circuits is essential, e.g. when overhaul work is in progress.
With a plug-in system, the molded case circuit breaker is moved into and out of the plug-in
socket manually.
Risk of large magnetic forces in the event of short circuits
Accident hazard posed by short circuit events. The molded case circuit breaker can be
ejected from its socket by the resulting magnetic forces.
The 3VA molded case circuit breaker must be bolted securely in position in the socket. The
complete kit for plug-in technology contains assembly bolts for this purpose.
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