Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 295)

Component Definition and Maintenance 6-5
7000 “B” Frame 7000-UM150I-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 four nuts and washers that secure the assembly to
the studs welded to the frame.
6. Remove the old VSB and replace with 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 Assembly
Replacement