Compact design, ONAN cooling with conservator & breatherHermetically Sealed Construction with corrugated expandable finsEHV grade mineral oil used for ONAN coolingUnique insulation system for silicon oil filled transformersHigh impedance transformer with in-built current limiting chokeElectrostatic Shield between Primary and Secondary windingsProprietary high voltage rectifier stack design consists of module cards with silicon diodes with RC protection across each diode to protect the bridge from the stored charge from the ESPComplete internal assembly is lid mounted for ease of maintenance and repairs