Chapter 6: GP
SC9000 EP medium voltage drives IB020001EN—February 2016 www.eaton.com 27
GP inverter removal or installation
WARNING
All incoming power must be disconnected and locked
out before performing maintenance on the SC9000 EP.
The DC bus voltage must be fully discharged. Failure to
disconnect incoming power and verify DC bus is
discharged can result in equipment damage, personal
injury, or death.
1. Complete the inverter grounding process and verify the
drive is in a zero energy state.
2. Disconnect the gate card fiber optic cables and URTD
fiber optic cable from the ITG (Figure 19). Coil and
secure fibers so they will not be damaged during inverter
removal. Refer to job-specific diagrams for correct wire
locations.
Figure 19. Fiber optic ITG connections
3. Disconnect the power supply harness from the base of
the inverter carriage (Figure 20).
Figure 20. Power supply harness connection
4. Disconnect inverter DC cables from landings (Figure 21).
(These connections should be made using 3/8-16 HHCS
bolts, flat washers, lock washers, and nuts. They should
be torqued to 18–25 ft-lb).
Figure 21. Inverter DC cable landings
5. Disconnect inverter AC cables from landings
(Figure 22A) or DVDT filter tabs (Figure 22B).
(These connections should be made using 3/8-16 HHCS
bolts, flat washers, lock washers, and nuts. They should
be torqued to 18–25 ft-lb).
6. Remove the support bracket holding the inverter in
place. Perform this step with a coworker spotting you in
case the inverter begins to move.
7. Align inverter wheels with cart or ramp and adjust cart or
ramp to proper height for a smooth transition.
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