Rockwell Automation 7000A PowerFlex Medium Voltage Drive (A-Frame) - Classic Control - Manual (Page 341)

Component Definition and Maintenance 6-37
7000 “A” Frame 7000A-UM150F-EN-P –June 2013
Push Nut
Resistor Bank
Retaining Rod
Figure 6.28 – Removing resistor bank from PowerCage
5. Remove the resistor bank from the Power Cage.
6. Place the new resistor bank assembly back into the PowerCage.
7. Slide the retaining rod into place and push the clips back into place.
8. Connect the leads to the resistor bank
9. Install the PowerCage as outlined in “PowerCage Removal”.
Sharing Resistors
Sharing resistors provide equal sharing of the voltage when matched
devices are used in series. SGCT PowerCages for 2400V systems do not
need matched devices and have no sharing resistor.
SCR PowerCages always have sharing resistors even if matched devices
are not required. Sharing resistors in SCR PowerCages provide a
diagnostic function.
Testing Sharing Resistors
It is possible to verify the resistance value of the sharing resistors without
removing the PowerCage from the cabinet. Follow the procedures in
Chapter 4 – Commissioning.