ABB ACS880-307LC, Hardware Manual

Page: 68 / 106

Fuses
￭ Checking and replacing the AC fuses
WARNING!
Obey the safety instructions given in ACS880 liquid-cooled multidrive
cabinets and modules safety instructions (3AXD50000048633 [English]).
If you ignore the safety instructions, injury or death, or damage to the
equipment can occur.
If you are not a qualified electrical professional, do not do installation or
maintenance work.
WARNING!
Use the required personal protective equipment. Wear protective gloves and long
sleeves. Some parts have sharp edges.
1. Stop the motors connected to the drive.
2. Repeat the steps described in section Electrical safety precautions (page 36) .
3. Open the cubicle door.
4. Remove any shrouding in front of the fuses.
5. 2×D8T: For replacing lower module AC fuses, remove the DC fuse assemblies:
• Remove the screws, nuts and washers (8 pcs) from the top and bottom of the DC
fuses. Write down the correct order of the washers.
• Remove the screws and nuts from the L-shaped busbars.
• Remove the DC fuses and the L-shaped busbars.
6. Remove the screw, nut and washer in the middle.
7. Remove the screws (3 pcs, 1 per each phase) from the L-shaped busbars above the
fuses.
8. Remove the screws that attach the L-shape busbars below the fuses to the module AC
busbars. There is one screw and busbar for each AC phase (3 pcs). Pull out the fuse
assemblies with the L-shaped busbars (above and below) attached.
9. Remove the screws, nuts and washers that attach the old fuses to the busbars, remove
the old fuses and attach the new fuses in reverse order. Make sure to keep the washers
in the original order. See section
Tightening torques (page 98) .
10. Install the fuse assemblies and busbars in reverse order. See section Tightening
torques (page 98) .
68 Maintenance