Fuses; Replacing The Ac And Dc Fuses In Cabinet - ABB ACS880-37LC Hardware Manual

Fuses

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Replacing the AC and DC fuses in cabinet

This procedure instructs how to replace the drive AC and DC fuses inside the cabinet. The
location of the fuses vary depending on the drive type and options. Locate the fuses to be
replaced using the delivery-specific layout drawings and circuit diagrams.
WARNING!
Obey the instructions in chapter Safety instructions. If you ignore them,
injury or death, or damage to the equipment can occur.
1. Stop the drive and do the steps in section
you start the work.
2. Open the door of the cubicle in which the fuses are.
3. Remove the shrouding from in front of the fuses.
4. Slacken the nuts of the headless screws of the fuses so that you can slide out the fuse
blocks. Make note of the order of the washers on the screws.
5. Remove the screws, nuts and washers from the old fuses and attach them to the new
fuses. Make sure to keep the washers in the original order.
6. Insert the new fuses into their slots in the cubicle. Pre-tighten the nuts first by hand or
by applying a torque of no more than 5 N·m (3.7 lbf·ft).
7. Tighten the nuts to torque as follows:
• Cooper-Bussmann fuses: 50 N·m (37 lbf·ft)
• Mersen (Ferraz-Shawmut): 46 N·m (34 lbf·ft)
• Other: Refer to the fuse manufacturer's instructions.
Electrical safety precautions (page 17)
Maintenance 131
before