Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive (A Frame) - ForGe Control - Manual (Page 61)

Rockwell Automation Publication 7000A-UM200C-EN-P - June 2014 61
Component Definition and Maintenance Chapter 3
Voltage-Sensing Circuit
Board Assembly
Replacement 1. Ensure there is no power to the equipment.
2. Remove clear plastic cover.
3. Mark the position of the ribbon cables and wires.
4. Remove the screws and lift the ring lugs from the terminals to remove the
wires.
5. Release the locking mechanism located on each side of the ribbon cable
connector and pull the ribbon cable straight out to prevent bending the
pins.
6. Remove the four nuts and washers that secure the assembly to the studs
welded to the frame.
7. Remove the old VSB and replace the new VSB on the studs, using the
existing hardware to secure the assembly.
8. Replace all ring lugs on terminals. Plug in ribbon cables making sure that
cables are positioned properly and fitting is secure (locking mechanism is
engaged).
9. For personnel and equipment safety, ensure both grounding connections
are re-connected to the sensing board.
10. Replace clear plastic cover and re-fasten in place.
Figure 45 - Sensing Board with mounting hardware placement
ATTENTION: To prevent electrical shock, ensure the main power has been
disconnected before working on the sensing board. 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.
IMPORTANT Do not overtorque the connections or you may break the studs.