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Fuses
Replacing the supply unit AC fuses (frame R8i)
￭
WARNING!
Use the required personal protective equipment. Wear protective gloves and
long sleeves. Some parts have sharp edges.
1.
Repeat the steps described in section
before you start the work.
2.
Open the door of the LCL filter 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 cubicle. 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 Cooper Bussmann fuses, and 46 N·m (34 lbf·ft) for Mersen
(Ferraz-Shawmut) fuses.
5.
Attach the shrouding (if any) and close the door.
Electrical safety precautions (page 43)
Maintenance 93
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