Factors on Tungsten Copper Contacts - Tungsten Powder Particle Size, Applications Occasions, Current Properties, the Breaking Speed of Contact and Early Pressure

There are many factors on tungsten copper contacts, among which the main factors are structure size of the contacts, the manufacturing process, the particle size of tungsten powder, applications occasions, current properties and the breaking speed of contact and early pressure and so on. " Factors on Tungsten Copper Contacts - Structure Size and Manufacturing Process" which focuses on the factors of structure size and manufacturing process, and this article will introduce the factors of tungsten powder particle size, applications occasions, current properties and the breaking speed of contact and early pressure:

3. The tungsten powder particle size. Studies have shown that, whether it is with a thicker tungsten powder or thinner tungsten powder to prepare a contact material, their anti-arc erosion performance is not very good, but if prepare the contact by mixing the coarse powder and fine powder at a certain percentage, then the performance of tungsten copper contacts are relatively better. Note items: if the components of the contact material are different, then their mixing proportions are also different.

4. Applications occasions. The experimental results show that for different applications occasions, different components of the contact have its corresponding optimal application occasions. For example, in air or a vacuum switch, tungsten (90) / copper (10) its performance against arc erosion is the best.
5. Current properties. Studies have shown that if the properties of the current are different, and then its on-off process will produce different transient properties, however, after selecting the contact, its value is constant.

6. The breaking speed of contact and early pressure. Arcing time is determined by breaking speed especially early opening rate; arcing time can be shortened by increasing the early speed to achieve it, so that the possibility of contact ablation reduced. If the early pressure is increased, the mechanical vibration of the contact can be reduced, so that the arc erosion and mechanical wear is reduced.

 

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