￭ Replacing the DC fuses
WARNING!
Read the safety instructions given in chapter Safety instructions. If you
ignore them, injury or death, or damage to the equipment can occur.
WARNING!
Wear protective gloves and long sleeves. Some parts have sharp edges.
1.
Repeat the steps described in section Electrical safety precautions (page 16) before
you start the work.
2. Open the door of the module cubicle.
3. Remove the shrouding in front of the fuses (if any).
4. 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(s) below. Tighten the nuts first by hand
or applying maximum 5 N·m force. Tightening torques for M12 nuts are 50 N·m (37 lbf·ft)
for Bussmann fuses, and 46 N·m (34 lbf·ft) for Ferraz Shawmut fuses.
5. Attach the shrouding (if any) and close the door.
130 Maintenance
To Next Page
Loading...
