Planning the electrical installation 43
Supply connection
Disconnecting device
Install a hand-operated input disconnecting device between the AC power source
and the drive. The disconnecting device must be of a type that can be locked to the
open position for installation and maintenance work.
EU
To meet the European Union Directives, according to standard EN 60204-1, Safety of
Machinery, the disconnecting device must be one of the following types:
• Switch-disconnector of utilization category AC-23B (EN 60947-3)
• Disconnector that has an auxiliary contact that in all cases causes switching
devices to break the load circuit before the opening of the main contacts of the
disconnector (EN 60947-3)
• Circuit breaker suitable for isolation in accordance with EN 60947-2
US
The disconnecting device must conform to the applicable safety regulations.
Fuses
See
Thermal overload and short-circuit protection
(page 44).
Main contactor
If a contactor is used, dimension it according to the nominal voltage and current of
the drive. The utilization category (IEC 947-4) is AC-1.
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