... 380VRated frequency:50HzConnection: Y Start-connection for 3kw and belowDelta-connection for 3kw or more Duty:S1Insulation class: ... enclosed, fan cooled ,squirrel cage type and noted for their novel design,excellent appearance,compact structure, low noise ... F class insulation and designed with assessing method for insulation system according to international practice, it enhances greatly mmotor ...