Centrifugal ventilator is a mechanical device that uses energy conversion to deliver gas. Its main functions are ventilation, dust extraction and cooling. It is mainly used in mines, tunnels, cooling towers and buildings. It works like a compressor. Centrifugal ventilators are generally not directly usable and must be commissioned to achieve the desired efficiency. Commissioning requirements must be carried out in accordance with the following requirements.
Under normal circumstances, the centrifugal ventilation fan allows full-voltage starting or step-down electric, but the current at full-voltage starting is about 5 to 7 times the rated current. The step-down starting torque is proportional to the square of the voltage. When the grid capacity is insufficient, A step-down start should be used. When testing the car, you should carefully read the product manual and carefully check the equipment.
When the centrifugal ventilation fan reaches the normal speed, the input current of the fan should be measured. The operating current of the centrifugal ventilation fan should not exceed its rated current. The motor power required by the centrifugal ventilation fan refers to the large power required for the centrifugal ventilation fan and the wind chassis when the air inlet is fully opened. When the fan is tested, the valve on the inlet and outlet of the fan can be closed. After the operation, the valve is gradually opened to reach the required working condition, and the operating current of the fan exceeds the rated current.