Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive (A Frame) - ForGe Control - Manual (Page 104)

104 Rockwell Automation Publication 7000A-UM200C-EN-P - June 2014
Chapter 3 Component Definition and Maintenance
Installation of the replacement DC link is performed in the reverse order of its
removal.
The installer must ensure that the flexible DC link leads are connected to the
appropriate terminal and routed so that electrical clearances are maintained.
Verify the nameplate ratings are the same or appropriate for the drive system. A
different DC link will require different parameter settings.
Thermal protection of the DC link reactor is provided by two normally closed
contacts wired to the I/O module. These contacts will open at 190 °C and cause a
fault/alarm message to be displayed.
Fan Replacement There are several models of cooling fans used in PowerFlex drives. Differing fan
types may be used in the various locations throughout the drive.
DC Link Section
The fan consists of a motor impeller assembly. To replace the fan, it is necessary to
remove the fan exhaust hood
Figure 86 .
Safety Notes
Fan replacement requires working at a significant height from the floor. Care
should be taken to make a suitable platform from which to work.
The fan motor weighs approximately 45 kg (100 lb) and will require suitable
lifting provision. Ensure that fan power is locked out during fan maintenance.
Remove the eight nuts that secure the motor frame to the side sheets of the
cabinet. Disconnect the power leads to the motor. Note the terminal locations so
that proper fan rotation is maintained.
To extract the fan, lifting hooks are placed in the holes of the motor mounting
brackets and the assembly is withdrawn vertically from the cabinet. Do not
support the assembly on the impeller or damage may result.
ATTENTION: To prevent electrical shock, ensure the main power has been
disconnected before working on the current transformer. Verify that all circuits
are voltage free using a hot stick or appropriate voltage-measuring device.
Failure to do so may result in injury or death.