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Reading Topic #4213
Why do the inverter cabinets on newer AC4400s have different external styling than older ones? The shape and size of the inverter bank is the same, but the metal skin definitely has a different look. Could this have something to do with the fact that since 1998 GE has used IGBTs (Integrated Gate Bipolar Transistors) in its inverters in place of the older GTOs (Gated Turn On devices)?
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