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Typical connections across shipping splits for a Frame C drive
are as described below (see Appendix C for section details):
Ground bus from Inverter section to transformer section
●
and from incoming section to transformer section
(Section 3 to 2 and 1 to 2)
Power cables from load side of main contactor to isolation
●
transformer and precharge contactor (Section 1 to 2)
Power cables from DC bus to line side of Inverter
●
(Section 2 to 3)
Power cables from load side of inverter to the drive
●
output terminals; Both ends of cables must be connected
(Sections 3 to 2 and 2 to 1)
Fiber optic cables from inverter to control card rack
●
(Section 3 to 2)
Control wiring from Inverter to control compartment
●
(Section 3 to 2)
Control wiring from main contactor to control
●
compartment (Section 1 to 2)
Typical connections across shipping splits for a Frame D
and E drive are as described below (see Appendix B for
section details):
Ground bus from inverter section to transformer section
●
and from incoming section to transformer section
(Section 3 to 2 and 1 to 2)
Power cables from load side of main contactor to isolation
●
transformer and precharge contactor (Section 1 to 2)
Power cables from DC bus to line side of inverter
●
(Section 2 to 3)
Fiber optic cables from inverter to control card rack
●
(Section 3 to 2)
Control wiring from inverter to control compartment
●
(Section 3 to 2)
Control wiring from main contactor to control
●
compartment (Section 1 to 2)
Refer to the order specific drawings for any additional wiring
that must be connected across shipping splits.
Incoming connections
De-energize
connections at their source before servicing any part of
the equipment directly connected to the incoming
power, including main horizontal bus, vertical bus, bus
potential transformers, or control power transformers.
Incoming power connects to the drive/lineup in a variety of
ways. For A, B, and C frames, the use of a pullbox option
(Figure 18) is very common due to its reduced footprint. A
pullbox is an adapter that allows a cable to bus connection
from the top. Mounting holes on the busbar are staggered to
allow more room between connections. If a large phase to
phase separation is desired, or more than two cables per
phase are required, an incoming line section would be the
better option. Cables, bus from other close-coupled
equipment, and bus duct are also common methods.
These connections should be made using 3/8-16 HHCS, flat
washers, lock washers, and nut. Apply 18–25 ft-lb torque.
Note that these connections may be energized even when
the drive isolation switch or other switching devices are in
the open position.
SC9000 EP medium voltage drives IB020001EN—February 2016 www.eaton.com
Chapter 4: Handling, storage, and installation
WARNING
and
lock
out
all
incoming
power
21
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