2024-07-05

The on-off element is the core part of the circuit breaker, and the main circuit is connected and disconnected by it. The on-off of the main circuit, after the operating mechanism receives the operation instruction, is transmitted to the on-off component through the intermediate transmission mechanism, and the on-off component executes the command to make the main circuit connected or disconnected. The on-off element comprises a contact, a conductive part, an arc extinguishing medium and an arc

2024-07-05

In power plants and substations, high-voltage circuit breakers are the main control equipment in circuits above 1000KV. The load current used to turn on or off a circuit during normal operation; When the fault occurs, it is used to quickly disconnect the short circuit current and remove the fault.

2024-07-05

1. SF6 gas leakage causes: (1) The seal is not tight. Studies have shown that the reasons for poor sealing are as follows: ① Sealing surface fastening bolts loose. Due to poor installation quality or vibration and other reasons, the sealing surface fastening bolts may be loosened, resulting in a loose seal and air leakage. ② Sealing ring aging. Field experience shows that the aging speed of the sealing ring is faster, generally in 8-10 years will be hard aging deformation or even decay,

2024-07-05

Sulfur hexafluoride itself is a non-toxic and harmless gas, but under the action of high temperature and high pressure arc, it often decomposes and dissociates a variety of products, some of which are toxic substances that will cause harm to the human body. At the same time, if a large amount of sulfur hexafluoride gas is inhaled, it will also cause adverse reactions such as asphyxia. But high-purity sulfur hexafluoride is the "oxygen" unavailable to the power industry, in case of gas poisoning?

2024-07-05

SF6 gas with excellent arc extinguishing performance and insulation performance is used as the circuit breaker of arc extinguishing medium, called SF6 circuit breaker, which is widely used in power system. Suitable for frequent operation and high-speed breaking occasions, it is recommended to use SF6 circuit breakers in 7.2-40.5 in China, especially almost all SF6 circuit breakers above 126KV. But not at high altitudes.

2024-07-05

In the power industry, high-purity sulfur hexafluoride is an important medium, which is used as a closed, high-voltage switch arc extinguishing and insulating gas. The excellent performance of SF6 gas enables economical and low-maintenance operation of the plant. At present, as an insulating and arc extinguishing medium, no other technology can surpass SF6 gas from a technical, economic and ecological point of view.