ABB ACS480, Руководство по оборудованию, Страница: 18 / 180

• 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 14)
• Measure that the installation is de-energized.
• Use a multimeter with an impedance greater than 1 Mohm.
• Make sure that the voltage between the drive output terminals (T1/U, T2/V, T3/W)
and the grounding (PE) busbar is close to 0 V.
• Make sure that the voltage between the drive input power terminals (L1, L2, L3)
and the grounding (PE) busbar is close to 0 V.
• Make sure that the voltage between the drive DC terminals (R+/UDC+ and UDC-)
and the grounding terminal (PE) is close to 0 V.
• Install temporary grounding to the drive output terminals (U2, V2, W2). Connect the
output terminals together as well as to the PE.
During the start up:
• Make sure that the motor cannot be run into overspeed, eg, 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 be run into overspeed, e.g. driven by the load.
Motor overspeed causes overvoltage that can damage or destroy the capacitors
in the intermediate circuit of the drive.
18 Safety instructions
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