ABB ACS880-37 Hardware Manual page 168

168 Maintenance
Replacing the DC fuses in the inverter module cubicle (frame

2×R8i + 2×R8i and up)
Parallel-connected inverter modules have DC fuses fitted above each module.
WARNING! Obey the instructions in chapter
ignore them, injury or death, or damage to the equipment can occur.
1. Do the steps in section
the work.
2. Open the door of the inverter module cubicle.
3. Remove the shrouding from in front of the fuses.
4. Slacken the nuts of the headless screws of the fuses so that you can slide out the fuse
blocks. Make note of the order of the washers on the screws.
5. Remove the screws, nuts and washers from the old fuses and attach them to the new
fuses. Make sure to keep the washers in the original order.
6. Insert the new fuses into their slots in the cubicle.
7. Tighten the nuts to torque as follows:
•
Cooper-Bussmann fuses: 50 N•m (37 lbf•ft)
•
Mersen (Ferraz-Shawmut): 46 N•m (34 lbf•ft)
•
Other: Refer to the fuse manufacturer's instructions.
8. Reinstall the shrouding removed earlier and close the cubicle door.
Precautions before electrical work
Safety instructions. If you
on page 21 before you start
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