... fan design, the standard rotation direction from the drive clockwise rotation depends on other special requirements of customers ... by Faraday companyRemarksVoltage: 230V/400V, 240V/415V, 110V/220V Medium Voltage: 660V/690VThree-phase four-wire: 50HZ 1500r/min, ... , single, double fulcrum optional, brushless excitation, AVR automatic voltage regulator, insulation, such as H-class, steel chassis stable ...