OEM Signal Generator Change over Switch 1,stamford type of AC generator 2,advanced ... AVR 3,good after-sale service,safe OEM Signal Generator Change over Switch1,stamford type of AC generator2,advanced AVR3,good ... frequency: 50 / 60Hz4) Rated speed: 1,500 / 1,800rpm5) Three-phase four-wire6) Protection: I5P21- IP237) Insulation: Class H8) Standard: International ...