ABB ACS880-207, Hardware Manual

Page: 112 / 148

4. DC fuses (a) are located on top of the IGBT supply module. Check the condition of the
fuses. In case of a blown fuse, replace all fuses with similar fuses: slacken the nuts of
the fuses and pull the fuses out. Do not unscrew the nuts completely, not to drop them
inside the module below. Tighten the nuts by hand or applying maximum 5 N·m force.
Tightening torques for nuts are:
Mersen (Ferraz-Shawmut) fuses Cooper Bussmann fuses Nut
46 N·m 50 N·m M12
5. Attach the shrouds in reverse order and close the door.
￭
Checking and replacing the AC fuses (frame R8i and multiples)
WARNING!
Only qualified electricians are allowed to this work. Read the complete safety
instructions of the drive. Ignoring the instructions can cause physical injury or
death, or damage to the equipment.
1. Disconnect the drive from the AC power line and make sure it is safe to start the work.
See section Electrical safety precautions (page 46) .
2. Open the IGBT supply module cubicle door.
3. Undo the screws of the shroud in the upper part of the cubicle. Lift and remove the
shroud.
4. AC fuses (b) are located on top of the LCL filter module. Check the condition of the
fuses. In case of a blown fuse, replace all fuses with similar fuses: slacken the nuts of
the fuses and pull the fuses out. Do not unscrew the nuts completely, not to drop them
inside the module below. Tighten the nuts first by hand or applying maximum 5 N·m
force. Tightening torques for nuts are:
Mersen (Ferraz-Shawmut) fuses Cooper Bussmann fuses Nut
46 N·m 50 N·m M12
5. Attach the shroud and close the door.
112 Maintenance