... class Insulation, Self-Exited ,IP23 Protection, AVR regulation, Voltage deviation: ±0.5%, THF<5%,low radio interference.3) Frequency: 50 & 60Hz4 ... % load, 75% load,100% load , 110% load and all protection function (overspeed stop, high water temperature, low oil pressure, battery charging ... inspection Power World CE approved AC three phase VOLVO Diesel Generator Set