Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 296)

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Component Definition and Maintenance
7000A-RM001A-EN-P – January 2011 7000 “A” Frame
Impeller Maintenance Isolation Transformer Cooling Fan
The isolation transformer fan motor and impeller is an integral unit and
cannot be serviced separately.
The inlet ring is the large circular part located beneath the fan impeller.
It is positioned such that the impeller sits outside but does not touch the
ring. The ring sits inside the impeller 10 mm (0.40 inches). Refer to the
cutaway view of fan impeller and bushing (Figure 5.40).
Safety Notes
This procedure will require coming in contact with the internal electrical
connectors and devices. It is EXTREMELY important that ALL
POWER BE REMOVED FROM THE DRIVE! Failing to do so may
result in serious injury or death.
Precautions must be taken to prevent the inlet ring from falling after all of
the bolts have been removed.
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
within the DC Link and Fan Area. Verify that all
circuits are voltage free using a hot stick or
appropriate high voltage-measuring device.
Failure to do so may result in injury or death.
Inlet Ring Removal and
Replacement