In the great wave of industrial development, the development direction of enterprises has its own emphasis, but the quality of products is the foundation of enterprises, and the essential thing in the production and manufacturing process of products is the need to test the quality of each product.Below, we will explain the protection test of the cooling fan in detail.

    First, the swivel locking protection test

1.Several fan blades are connected together to fixedly restrict the rotation of the fan.If the fan and electronic components are not damaged and the components restricting the rotation are released, the fan can automatically restart the rotation.

2.The fan with small current or auto start function locks the fan blades in the power-on rotating state and releases the locked fan blades after 72 hours, and the fan automatically restarts immediately, proving that there is no abnormality in the fan.

3.For fans with high current or without Auto Start function, do not lock them for a long time, or they will overheat and damage.

    II.Insulation Impedance

Under the condition of 500 v DC, the resistance between the outer frame and the positive electrode of the wire shall not be less than 10m Ω

    III.Insulation Strength

Under the condition of 5mA leakage current and AC 500 V for 60 seconds, there is no abnormality in fan frame and wire, proving good insulation

    Four, free fall

The monomer dropped from 600 mm high to 30 mm thick board, and any side and corner of the 6 surfaces of the fan can withstand drop test and be confirmed to be free from damage.

    V polarity protection

Under normal voltage conditions, all functions will be normal if the fan is powered on for 15 minutes by the reverse power supply and the normal two poles are connected again after the power is cut off.