It is suitable in AC up to 380V (440V), 50HZ (60HZ) secondary control loop, For 1-5 steps speedgoverning and braking.

 Structural features

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.

 Working condition

 Permissible ambient temperature between -5°C to +55°C 2 Height no more than 2,000 meters3 The relative humidity does not exceed 85%4 Class of pollution: 3.

QT3A Series Controller