ABB ACS580-07 - Replacing AC Fuses

1.
Stop the drive and do the steps in section Electrical safety precautions (page 20) before
you start the work.
2. Open the cabinet door.
3. Remove the shrouding from in front of the switch fuse.
4. Replace the fuses with the fuse handle which is in the cabinet.
5. Reinstall the shrouding removed earlier and close the cabinet door.
￭ Replacing AC fuses
WARNING!
Obey the instructions in chapter Safety instructions. If you ignore them, injury or
death, or damage to the equipment can occur.
1.
Stop the drive and do the steps in section Electrical safety precautions (page 20) before
you start the work.
2. Open the cabinet door.
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 a 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.
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6. Insert the new fuses into their slots in the cabinet.
7. Tighten the screws to torque 5 N·m (3 lbf·ft) maximum.
8. Tighten the nuts to torque as follows:
• Cooper-Bussmann fuses: 50 N·m (37 lbf·ft) if size 3; 40 N·m (30 lbf·ft) if size 2
• Mersen (Ferraz-Shawmut): 46 N·m (34 lbf·ft) if size 33; 26 N·m (19 lbf·ft) if size 32
• Other fuses: Refer to the fuse manufacturer's instructions.
9. Reinstall the shrouding removed earlier and close the cabinet door.
Maintenance 167