Instructions for use and maintenance
Electric motors 50-400 V CA
Page
17
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22
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protection connection made according to the system with neutral conductor connected
to the ground at the origin and used as protection conductor (in this case it is not possible
to use the differential protection and therefore the switches of maximum current must
intervene).
Consult the specific regulations.
The coordination and selectivity of all the protections must be guaranteed, in order to
adequately protect lines and equipment; the automatic restoration of the protections after they
have intervened is always prohibited, in so far as this may result in an unsafe condition; in
addition, the intervention of trained personnel for the manual restoration of the system, of
which the electric motor is a major part or part, is mandatory. When present.
