Y-H series motor is sealing-in, self-cooling and caged type marine three-phase induction motor. The motors have such characteristics as high efficiency, low noise, slight vibration, high locked-rotor torque and reliable operation. It can be used to drive various machines, including pumps, ventilators, separators, hydraulic machines and other machines. The motor is able to operate on below conditions, such as dewdrops, salt-fog, mould, vibration and shock.