Specifications

Maintenance and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
7-46
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For DC0010 through DC0056 drive sizes, all SCR gate and
cathode leads must be connected as shown. For DC0110 and
larger drive sizes, only field SCR gate and cathode leads must be
connected as shown.
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9. Remove the three Phillips head screws on CR1 and CR2 (six total). Note
connection placement.
10. Move the two bus bar links away from the thyristor and diode.
11. Remove the screws on each end of the device (CR1 or CR2) to be replaced.
7.10.2.2 Replacement and Reassembly
1. Apply a thin layer of thermally conductive compound to the bottom of new
thyristor or diode and reinsert in the field supply base.
2. Mount the new thyristor or diode using the screws located on each end. Torque
tighten the mounting screws to 38-50 in-lb. Recheck torque after a minimum of
3 hours.
3. Reinstall the wiring, bus bar connections and mounting hardware. Torque tighten
the screws to 22-30 in-lbs.
4. Plug in gate leads on CR1, observing correct polarity. The yellow leads should
face the “outboard” side of the device; the red leads should face the “inboard”
side.
5. Tighten the two captive screws holding the bridge interface assembly to the base.
6. Plug in connectors J5 and J6 to the bridge interface board (A3).