... 500 / 1,800rpm4) Noise level: 75dB to 80dB 7 meter awayAlternator: 1) Brand: Stamford or Leroysomer or Our WT series2 ... ) Phase: 3-phase, 4-wire7) Connection: Y or other type connection8) Rated speed: 1,500rpm / 1,800rpm9) Excitation: harmonic ... IP23 Controller system1.Standard control panel, including voltmeter, fequency meter, ampere meter,water temperature gauge, oil temperature gauge, oil pressure ...