The High Voltage Cabinet and associated sub-panel, shown below, contain all of the motor starters and protectors, main power disconnect, variable frequency drives (VFD's), breakers, relays, and other associated electrical hardware.
The Control Power Transformer transforms a portion of the incoming electrical power to reliable 120V control power, used to supply power to various electrical components.
The Variable Frequency Drive is used to control the speed of the discharge metering/sweep system and is controlled directly by the PLC.