ABB ACS800-67LC, Hardware Manual

Page: 102 / 154

102 Maintenance
Replacing DC fuses
There are two types of DC fuses that can be used with the converter, Bussmann and
Mersen fuses. If the replacement fuses are of the other type than the fuses previously
used in the converter, you have to adjust assembly parts as instructed in
Bussmann fuses
and Mersen fuses .
1. Ensure that the converter is disconnected from the power supply network and all other
precautions described in section Safety in installation and maintenance , page 12 have
been taken into consideration.
2. Remove the shrouds in front of the fuses.
3. Open the M12 nuts and remove the fuses.
4. If necessary, adjust the assembly parts. See sections
Bussmann fuses and Mersen
fuses .
5. Insert new fuses.
6. Re-assemble the parts in reverse order.
•
The tightening torque for the M12 set screws is 5 N·m (3.7 lbf·ft).
•
The tightening torque for the M12 nuts is 50 N·m (37 lbf·ft).
2