Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 349)

Component Definition and Maintenance 6-5
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
The number of sensing boards is dependent upon the drive rectifier
configuration.
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 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.
2. Mark the position of the ribbon cables and wires.
3. Remove the screws and lift the ring lugs from the terminals to
remove the wires.
4. 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.
5. Remove the 4 nuts and washers that secure the assembly to the
studs welded to the frame.
6. Remove the old VSB and replace the new VSB on the studs,
using the existing hardware to secure the assembly. Do not
overtorque the connections or you may break the studs.
7. Replace ring lugs on terminals. Plug in ribbon cables making
sure that cables are positioned properly and fitting is secure
(locking mechanism is engaged).
8. For personnel and equipment safety, ensure both grounding
connections are re-connected to the sensing board.
Figure 6.4 – Sensing Board with mounting hardware placement
Voltage-Sensing Circuit
Board Assembly
Replacement