• Name: QZ1/2S Series AC crane adjusting speed control device

        The series electronic control device matching with the master controller and resistors, used to control and protect the crane hoisting mechanism of wound-rotor induction motor starting, speed adjusting, reversing and braking. The scheme benefits are: Weight in the fall to get a steady speed, both medium and high speed gear, reliable, energy saving; compared with other speed control options, low cost, simple circuit, easy to maintain. The disadvantage is the stable low-speed can not be achieved in the direction of lifting.