How do Electrical Contact Points affect electrical performance?

1. Contact resistance
Definition and impact : Contact resistance is the resistance between electrical contacts due to incomplete contact. High contact resistance will increase energy loss and heat generation during current transmission, which will affect the efficiency and life of electrical equipment.
Influencing factors : The size of electrical contact points is affected by many factors such as contact point material, surface condition, contact pressure, temperature, etc. For example, silver-based materials are often used to make electrical contacts with low contact resistance due to their high conductivity.

2. Current transmission efficiency
Influencing mechanism : Good electrical contacts can ensure smooth transmission of current in the electrical system, reducing energy loss and heat generation. Conversely, poor contact electrical contacts will cause current transmission to be blocked and reduce system efficiency.
Practical application : In high-voltage and high-current application scenarios, such as switchgear and transformers in power systems, the performance of electrical contacts is particularly critical. They must be able to withstand the impact of high current without overheating, melting or ablation.

3. System stability and reliability
Stability impact : The stability of electrical contacts directly affects the stability of the electrical system. Electrical contacts with poor contact or frequent jumping can cause system voltage fluctuations, unstable current and other problems, which in turn affect the normal operation of electrical equipment.
Reliability improvement : The reliability of electrical systems can be significantly improved by optimizing the design, material selection and manufacturing process of electrical contacts. For example, the use of wear-resistant and corrosion-resistant materials to make electrical contacts can extend their service life and reduce the failure rate.

4. Safety
Arc generation and protection : In electrical systems, electrical contacts with poor contact are prone to arcing. Arcs not only cause ablation and damage to electrical contacts, but may also cause safety accidents such as fires. Therefore, the design of electrical contacts must consider arc protection issues, such as the use of arc extinguishing devices.
Short circuit and open circuit protection : Poor contact of electrical contacts may also cause faults such as short circuits or open circuits. Short circuits will cause the current to increase sharply and generate a lot of heat and sparks; open circuits will cause electrical equipment to lose power and fail to work properly. Therefore, the design and maintenance of electrical contacts must ensure that they maintain good contact performance under various working conditions.