Figure 7: OptiSpeed system architecture (Model VSD 503 with harmonic filter shown, similar
to 385, 419, 608 models)
Callout Description
1 Filter pre-charge contactor
2 Filter supply contactor
3 Direct current current transducers (DCCTs)
4 Filter issues
5 50/60 Hz inverter (50 Hz applications only)
6 Filter inductor
7 Filter trap assembly
8 Filter pre-charge resistors
Liquid-Cooled OptiSpeed Compressor Speed Drive26
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