... ,8) 230 / 400V AC, 50Hz / 60Hz, 0.8pF three-phase and four wires alternating current output 9) Frequency: <3% ,10 ... current B) Operation display: I) Unit voltage, tri-phase load current and frequency display Ii) Water temperature, oil pressure ... shuntConnecting type3PH star, 3PH-DELTASteady frequency change0-5%No load voltage≥95%-105Steady voltage≤±1Insulation degreeH degreeExclosure degreeIP23