... optional ,8) 230 / 400V AC, 50Hz / 60Hz, 0.8pF three-phase and four wires alternating current output 9) Frequency: <3% ,10 ... load and over current B) Operation display: I) Unit voltage, tri-phase load current and frequency display Ii) Water temperature, oil pressure ... tank cooling system E) Flange connector F) 12 / 24V starting motor and charge engine G) Air cleaner, fuel cleaner, oil cleaner ...