ABB ACS880-37 Hardware Manual page 166

166 Maintenance
Replacing the DC fuses in the supply module cubicle (frame

2×R8i + 2×R8i and up)
There are DC fuses at the output of each supply module (labeled 4b in the drawing below).
Note that there are also DC fuses at the input of each inverter module; see page 168.
This procedure can also be used to replace the AC fuses located above the LCL filter
modules (4a).
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 supply 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. Pre-tighten the nuts first by hand or
by applying a torque of no more than 5 N·m (3.7 lbf•ft).
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 shroud and close the door.
Precautions before electrical work
Safety instructions. If you
(page 21) before you start