Fuses; Checking And Replacing The Dc Fuses (Limited Scope Version) - ABB ACS880-207 Hardware Manual

Fuses

Checking and replacing the DC fuses (limited scope version)

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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
charging circuit [Q3].
2. Open the IGBT supply module cubicle door.
3. Undo the screws of the shroud in the upper part of the cubicle. Remove the shroud.
4. Disconnect all conductors wired to the components which are attached to the assembly
plate in front of the fuses (such as wiring to the charging contactor [Q4]). Write down
the correct connections before disconnecting.
5. Undo the fastening screws of the assembly plate and pull it out.
6. 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:
Nut
M12
7. Install the assembly plate back on place. Connect all conductors wired to the components
which are attached to the assembly plate. Attach the shrouds in reverse order and close
the door.
46). Switch off the disconnector of the
Cooper Bussmann fuses
50 N·m
Maintenance 109
Mersen (Ferraz-Shawmut) fuses
46 N·m