ABB ACS480-04-09A8-1, Hardware Manual

Page: 21 / 240

• If you cannot disconnect the motor, make sure that the motor cannot rotate during
work. Make sure that no other system, like hydraulic crawling drives, can rotate the
motor directly or through any mechanical connection like felt, nip, rope, etc.
• Do the steps in section Electrical safety precautions (page 18) .
• Install temporary grounding to the drive output terminals (T1/U, T2/V, T3/W). Connect
the output terminals together as well as to the PE.
During the start-up:
• Make sure that the motor cannot run overspeed, for example, driven by the load.
Motor overspeed causes overvoltage that can damage or destroy the capacitors in
the intermediate circuit of the drive.
￭
Safety in operation
WARNING!
Make sure that the motor cannot run overspeed, for example, driven by the load.
Motor overspeed causes overvoltage that can damage or destroy the capacitors
in the intermediate circuit of the drive.
Safety instructions 21