Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 362)

6-58 Component Definition and Maintenance
7000A-UM150F-EN-P –June 2013 7000 “A” Frame
Fan Replacement
There are several models of cooling fans used in PowerFlex “A”
Frame drives. Differing fan types may be used in the various
locations throughout the drive.
DC Link Section
The fan consists of a motor and impeller assembly. To replace the
fan it is necessary to remove the fan exhaust hood. See Figure
6.47 .
A T T E N T I O N A T T E N T I O N 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.
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 lbs) 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 sidesheets 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mounting brackets and the assembly is withdrawn vertically from the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.
Fan motor
Fan impeller
Mounting holes
Inlet ring
Mounting bracket
Lifting points (4)
Fan motor
Fan impeller
Mounting holes
Inlet ring
Mounting bracket
Fan motor
Fan impeller
Mounting holes
Inlet ring
Mounting bracket
Lifting points (4)
Figure 6.47 – Fan removal