Fuses - ABB ACS880-17 Hardware Manual

156 Maintenance

Fuses

Replacing fuses (frame R11)

WARNING! Obey the instructions in chapter
ignore them, injury or death, or damage to the equipment can occur.
1. Stop the drive (if running) and do the steps in section
(page 16) before you start the work.
2. Open the cabinet door.
3. Bottom entry of cables: (In marine versions, option +C121, undo the three M6 screws
on the left side of the swing-out frame.) Undo the two M6 screws on the right side of
the swing-out frame and open the swing-out frame, or remove the shroud if there is no
swing-out frame.
Top entry of cables: (In marine versions, option +C121, undo the three M6 screws on
the left side of the swing-out frame.) Undo the two M6 screws on the right side of the
swing-out frame and open the swing-out frame, or remove the shroud if there is no
swing-out frame. Remove the plate under the swing-out frame (if present) or remove
the shroud.
4. Remove the plastic shroud in front of the fuses.
5. 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.
6. 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.
7. Insert the new fuses into their slots in the cubicle.
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/option plate removed earlier/close the swing-out frame and
close the cabinet door.
Note: You can access the screws on the left side
of the fuse shroud easier if you open the swing-
out frame slightly and use the gap between the
swing-out frame and cabinet frame to access the
screws.
Safety instructions. If you
Electrical safety precautions