Digitax HD M75X Series Installation and Technical Guide
89
Issue Number: 5
Figure 5-5 External DC bus cable connection kit - Installation step 2
•
Connect the DC cables to the terminal studs of the External DC bus cable connection kit (
1
) and secure using the M5 nuts provided. Tools
required - M8 socket and torque wrench, torque 4 N m (35.4 lb in).
Figure 5-6 External DC bus cable connection kit - Installation step 3
•
Slide the DC bus cable connection cover into position (
1
) and secure the DC terminal cover.
Where a single AC feed is used to supply multiple drives DC paralleled via cables, the AC supply fuses will also protect the DC supply cables if the
DC cables are rated for the AC fuse current rating multiplied by a factor to account for the difference between AC and DC supply current.
The DC cables should be rated for the AC fuse rating x 1.25.
Where this is not possible, additional protection for the DC cables should be considered.
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1
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