
4 Operation
4.2 Operational warnings
DB1 variable frequency drive
11/20 MN040031EN
Eaton.com
84
WARNING
Any contactors and switching devices on the line side are not to
be opened during motor operation.
Inching operation using the mains contactor is not permitted.
Contactors and switchgear (repair and maintenance switches)
on the motor side must not be opened while the motor is in
operation.
Inching operation of the motor with contactors and switching
devices in the output of the variable frequency drive is not per-
missible.
WARNING
Make sure that no danger will be caused by starting the motor.
Disconnect the machine being powered if there is a danger of it
operating in an incorrect state.
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If motors are to be operated with frequencies higher than the
standard 50 or 60 Hz, then these operating ranges must be
approved by the motor manufacturer. Otherwise the motors
could be damaged.