The crane controller QT3A is used for AC 380V (440V), 50HZ (60HZ) secondary control loop, 1-5 steps speedgoverning and braking.

Small size, easy operation,  clear steps, etc., the operating mechanism with spring return and self-locking device in zero position for safety. Each mechanism can be installed with potentiometer. Using universal switch control, for reducing the cost of the product, making it suitable for tower cranes and other small cranes.

 

QT3A series Crane controller