Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - ForGe Control (PanelView 550) User Manual
Page 61
Rockwell Automation Publication 7000-UM151E-EN-P - January 2013
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Component Definition and Maintenance Chapter 3
3. To remove the SCR and SCR SPGDB, first remove the Gate Driver Power
Supply connector (from snubber circuit), the fiber optic cable, and the
SCR gate-cathode connection. Exceeding the minimum bend radius (50
mm/2 in.) of the fiber optic cables may result in damage.
4. Remove the load on the clamp head assembly as described under
5. Loosen the 2 captive screws with a long Phillips screwdriver until the
circuit board is free. If necessary, adjust the position of the heatsinks to
allow free movement of the SCR.
6. Slide the SCR and SCR SPGDB straight out.
7. While grounded, unplug the Gate-Cathode connector from the SCR
SPGD board.
To replace the SCR, follow steps 8-11 and 15-18.
To replace the SCR SPGDB, follow steps 12-18.
8. Loosen the tie wrap holding the G-C wire in place, and remove the device
from the assembly.
9. Install the new device in the same position and using the same orientation
as the original SCR, and firmly secure the G-C wires with the same tie
wrap.
10. Connect the Gate-Cathode connector to the Gate Driver board.
ATTENTION: You may damage the fiber optic cables if you strike or bend
them sharply. The minimum bend radius is 50 mm (2 inches). The
connector has a locking feature that requires pinching the tab and gently
pulling straight out. Hold the component on the printed circuit board to
prevent damage.
ATTENTION: Static charges can destroy or damage the SCR and SCR
SPGD board. Properly ground yourself before removing the replacement
SCR and SCR SPGD board from the protective anti-static bag. Using
damaged circuit boards may also damage related components. Use a
grounding wrist strap for handling sensitive circuit boards.
IMPORTANT Never adjust the orientation of the SCR using the Gate and Cathode
Leads. These connections are sensitive; adjust the device orientation by
turning the device itself.