Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 290)

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Component Definition and Maintenance
7000A-RM001A-EN-P – January 2011 7000 “A” Frame
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. See Figure 5.37.
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 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mounting brackets and the assembly is withdrawn vertically from the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.
Fan motor
Fan impeller
Inlet ring
Mounting bracket
Lifting points (4)
Mounting holes
Figure 5.37 – Fan Removal