Safety Instructions
iv
ACA 635 IGBT Supply Sections
The control boards of the converter unit may be at the main circuit
potential. Dangerous voltages may be present between the control
boards and the frame of the converter unit, when the main circuit
voltage is on. It is critical that the measuring instruments, such as an
oscilloscope, are used with caution and safety as a high priority. The
fault tracing instructions give special mention of cases in which
measurements may be performed on the control boards, also indicating
the measuring method to be used.
Live parts on the inside of doors are protected against direct contact.
Special safety attention shall be paid when handling shrouds made of
sheet metal.
Do not make any voltage withstand tests on any part of the unit while
the unit is connected. Disconnect motor cables before making any
measurements on motors or motor cables.
WARNING!
Close switch fuses of all parallel connected inverters
before starting the drive.
Do not open the drive section switch fuses when the inverter is
running.
Do not use Prevention of Unexpected Start for stopping the drive
when the inverter is running. Give a Stop command instead.
CAUTION!
Fans may continue to rotate for a while after the
disconnection of the electrical supply.
CAUTION!
Some parts like heatsinks of power semiconductors and
toroidal cores on motor cables inside the cabinet remain hot for a while
after the disconnection of the electrical supply.
Automatic Resets
WARNING!
If an external source for start command is selected and it is
ON, the ACA 635 will start immediately after fault reset.
Summary of Contents for ACS 600 MultiDrive
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Page 8: ...Safety Instructions vi ACA 635 IGBT Supply Sections ...
Page 57: ...Chapter 7 Fault Tracing 7 8 ACA 635 IGBT Supply Sections ...
Page 99: ...Appendix B Circuit Diagrams B 2 ACA 635 IGBT Supply Sections H ...
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