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Figure 4: OptiSpeed system architecture (Model VSD 351 without harmonic filter shown,
similar to 270, 292, 424 models)
Callout
Description
1
Cooling fans
2
Cooling coil
3
Gate driver board
4
IGBT
5
DC bus isolator board
6
SCR trigger board
7
SCR/Diode module
23
Liquid-Cooled OptiSpeed Compressor Speed Drive