Specifications

Maintenance and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
7-37
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C A U T I O N
IT IS NECESSARY TO FOLLOW THE TORQUE
SPECIFICATIONS TO INSURE PROPER OPERATION
AND RELIABILITY OF THE UNIT.
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7.9 THYRISTOR MODULE AND FUSE REPLACEMENT (550 ADC)
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W A R N I N G
HAZARDOUS VOLTAGES WHICH CAN CAUSE SEVERE
INJURY OR DEATH ARE PRESENT DURING THE
OPERATION OF THIS EQUIPMENT. TURN OFF AND
LOCK OUT ALL SOURCES OF POWER BEFORE
MAKING ANY REPAIRS.
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1. Remove all sources of power from the unit.
2. Open the main drive door.
3. Refer to Figures 7-3 and 7-6. Remove the bus bar support brace, which is
just above the bridge interface assembly, by removing the two quarter-turn
fasteners. The three AC fuses (F8-10), the motor armature fuse (F11), and
the AC field fuses (F1 and F2) lie behind this brace.
4. Remove the bridge interface assembly, as instructed in section 7.3.4.
5. To replace F8, 9, 10, or 11 fuses, perform the following steps in order:
a. Remove the appropriate vertical bus bar.
b. Remove the desired fuse with its adjacent bus bars (one at each
end) as an assembly. Do this by removing the two 5/16-18 hex
head screws that hold the inner adjacent bus bar in place. Use a
1/2" hex head socket wrench.
c. Remove the 1/2-13 hex head screws to release the fuse.