Planning the electrical installation
47
EEA / Europe
If the drive is used in an application which must meet the European Union Machinery
Directive 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.
Main contactor
If used, dimension the contactor according to the nominal voltage and current of the
drive. The utilization category (IEC 947-4) is AC-1.
Fuses
See section Thermal overload and short-circuit protection.
Thermal overload and short-circuit protection
Thermal overload protection of the drive and the input and motor cables
The drive protects itself and the input and motor cables against thermal overload
when the cables are dimensioned according to the nominal current of the drive. No
additional thermal protection devices are needed.
WARNING! If the drive is connected to multiple motors, a separate thermal overload
switch or a circuit breaker must be used for protecting each cable and motor. These
devices may require a separate fuse to cut off the short-circuit current.
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