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Permanent magnet motor
Only one permanent magnet motor can be connected to the drive output.
It is recommended to install a safety switch between the permanent magnet motor
and the drive output. The switch is needed to isolate the motor during any
maintenance work on the drive.
Supply connection
Disconnecting device (disconnecting means)
Install a hand-operated input disconnecting device (disconnecting means) 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 means must conform to the applicable safety regulations.
Fuses
Thermal overload and short-circuit protection
See
Thermal overload and short-circuit protection
Thermal overload protection
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.
The drive protects the motor cable and motor in a short-circuit situation when the
motor cable is dimensioned according to the nominal current of the drive.
Planning the electrical installation 53
(page 53).
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