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Chapter 4: Handling, storage, and installation
In drive-to-drive applications, the ground bus connection will
generally be made through the forward most opening in the
side sheet In rear aligned drive to Ampgard applications, the
ground bus connection will be made through the central
opening of the drive, while the forward opening is blanked
by a cover plate (Figure 8).
Figure 8. Ground bus openings
Forward
ground bus
opening
Structure connection
Drive-to-drive and shipping splits within a drive unit are
directly coupled. One coupling method utilizes a side sheet
with weld nut where the mating side sheet has a clearance
hole. Other couplings use clearance holes in both mating
sheets. In either case, 3/8-16 HHCS, flat washer, and lock
washer are to be used and torqued to 18–25 ft-lb torque
(Figure 9).
Figure 9. Structure connection detail
Example of
weld nut in
side sheet
18
SC9000 EP medium voltage drives IB020001EN—February 2016 www.eaton.com
Drive units are secured to Ampgard units through the use of
a transition section.In these applications, Tinnerman nuts are
placed in the side sheet of the drive and the transition
section is bolted to it using 3/8-16 HHCS with flat and lock
washer. Tinnerman nuts (5/16-18) are also placed in the
opposite flange (Ampgard side) of the transition section
(Figure 10).
Figure 10. Transition section
Center
opening—
typical for
connection
to Ampgard
Example of
structure
connection
points
Transition
section
Connection
point for
Ampgard
Connection
point for
drive
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