General Safety - ABB ACS355 series User Manual

Permanent magnet synchronous motor drives
These are additional warnings concerning permanent magnet synchronous motor
drives. Ignoring the instructions can cause physical injury or death, or damage to the
equipment.
WARNING! Do not work on the drive when the permanent magnet
synchronous motor is rotating. Also, when the supply power is switched off and
the inverter is stopped, a rotating permanent magnet synchronous motor feeds power
to the intermediate circuit of the drive and the supply connections become live.
Before installation and maintenance work on the drive:
• Stop the motor.
• Ensure that there is no voltage on the drive power terminals according to step 1 or
2, or if possible, according to the both steps.
1. Disconnect the motor from the drive with a safety switch or by other means.
Measure that there is no voltage present on the drive input or output terminals
(U1, V1, W1, U2, V2, W2, BRK+, BRK-).
2. Ensure that the motor cannot rotate during work. Make sure that no other
system, like hydraulic crawling drives, is able to rotate the motor directly or
through any mechanical connection like felt, nip, rope, etc. Measure that there
is no voltage present on the drive input or output terminals (U1, V1, W1, U2,
V2, W2, BRK+, BRK-). Ground the drive output terminals temporarily by
connecting them together as well as to the PE.


General safety

WARNING! Ignoring the following instructions can cause physical injury or
death, or damage to the equipment.
• The drive is not field repairable. Never attempt to repair a malfunctioning drive;
contact your local ABB representative or Authorized Service Center for
replacement.
• Make sure that dust from drilling does not enter the drive during the installation.
Electrically conductive dust inside the drive may cause damage or lead to
malfunction.
• Ensure sufficient cooling.
Safety 19