Permanent Magnet Motor - ABB ACS800 Hardware Manual

10

Permanent Magnet Motor

These are additional warnings concerning permanent magnet motor drives.
WARNING! Do not work on the drive when the permanent magnet motor is rotating.
Also, when the supply power is switched off and the inverter is stopped, a rotating
permanent magnet motor feeds power to the intermediate circuit of the drive and the
supply connections become live.
Installation and Maintenance Work
Before installation and maintenance work on the drive:
• Disconnect the motor from the drive with a safety switch
and additionally if possible (or)
• lock the motor shaft and ground the motor connection terminals temporarily by
connecting them together as well as to the PE. Before grounding, measure that
the motor is de-energized.
Operation
Do not run the motor over the rated speed. Motor overspeed leads to overvoltage
which may explode the capacitors in the intermediate circuit of the drive.
Safety Instructions