18 ACS550-02/U2 User’s Manual
Planning the electrical installation
Supply connection
Disconnecting device (means)
Install a hand-operated input disconnecting device between the AC power source
(MCC) 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:
• a switch-disconnector of utilization category AC-23B (EN 60947-3)
• a 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)
• a circuit breaker suitable for isolation in accordance with EN 60947-2.
US
The disconnecting means must conform to the applicable safety regulations.
Fuses
See section Fuses and circuit breakers on page 295.
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