Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive (A Frame) - ForGe Control (PanelView 550) - Manual (Page 148)

4-22
Component Definition and Maintenance
7000A-UM151D-EN-P – March 2013 7000 “A” Frame
Generator Note:
W A R N I N G W A R N I N G Verify that the load is not turning due to the
process. A freewheeling motor can generate
voltage that will be back-fed to the equipment
being worked on.
Filter Capacitor Replacement
1.
Ensure there is no power to the equipment.
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 capacitor. 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.
A T T E N T I O N A T T E N T I O N Verify the load is not turning due to the process.
A freewheeling motor can generate voltage that
will be back-fed to the equipment being worked
on.
2.
Remove medium voltage barrier below the low voltage panel to
access capacitor. (See Figure 4.16).
3. Short all four bushings together and to ground on both capacitors
before handling the connections.
4. Note the location of all the cables and mark them accordingly.
5. Remove the 4 power connections to the terminals, and the single
ground connector from the drive to the capacitor frame.
6. Remove the grounding network and top bracket that holds the
capacitor in place. At the bottom of the capacitor, there is no
hardware securing the capacitor; it fits into a slot in the assembly.
7. Remove the capacitor from the drive. THESE CAPACITORS CAN
WEIGH AS MUCH AS 100 kg (220 lbs), SO YOU WILL REQUIRE
TWO PEOPLE TO REMOVE A CAPACITOR.
I M P O R T A N T I M P O R T A N T Do not lift capacitor by bushings. Doing so
may damage bushings and result in oil leakage.
D.C. Link / Fan / Control
Components (cont.)