Long-term Stability Research of Vacuum Pressure Switch

The long-term stability research of vacuum pressure switches mainly focuses on aspects such as the vacuum degree of vacuum interrupters, mechanical structure, sealing performance and operating environment. The following is a specific analysis of these aspects:

Vacuum degree of vacuum interrupter

The vacuum interrupter is the core component of the vacuum pressure switch, and its vacuum degree directly affects the breaking performance and insulation level of the switch. When leaving the factory, the vacuum degree of the vacuum interrupter is usually required to be no less than a certain standard, such as 1.3×10-5Pa. However, with the increase of usage time and the number of breaks, as well as the influence of external factors, the vacuum degree of the vacuum interrupter will gradually decrease. When the vacuum degree is lower than a certain threshold, such as 1.3×10-2Pa, it will lead to the instability of the breaking and closing capabilities. Therefore, long-term stability studies need to pay attention to the changes in the vacuum degree of the vacuum interrupter and take measures to maintain its vacuum degree within a reasonable range.

Mechanical structure stability

The mechanical structure of a vacuum pressure switch, including components such as contacts, springs, and bellows, may be affected by factors like vibration and shock during long-term operation, leading to loosening, deformation, or breakage of the components. This will affect the electrical performance and mechanical life of the switch. Therefore, long-term stability studies require evaluating the anti-vibration and anti-shock capabilities of mechanical structures and optimizing the structural design to enhance their stability.

Sealing performance

The sealing performance of vacuum pressure switches is crucial for maintaining the internal vacuum degree. If the seal is poor, outside air will seep into the interior of the switch, causing the vacuum degree to decrease and thereby affecting the performance of the switch. Long-term stability research needs to focus on aspects such as the aging resistance of sealing materials, the rationality of sealing structures, and the reliability of sealing processes, to ensure that the switch maintains good sealing performance during long-term operation.

Operating environment adaptability

The operating environment of vacuum pressure switches, such as temperature, humidity and medium, will also have an impact on their long-term stability. For instance, high-temperature environments may accelerate the aging and deformation of components, excessive humidity may lead to a decline in electrical performance, and certain media may cause corrosion to the components of the switch. Therefore, long-term stability studies require the assessment of the adaptability of switches in different operating environments and the adoption of corresponding protective measures to enhance their stability.