35KV Mid mounted ZW32 Outdoor Permanent Magnet Vacuum Circuit Breaker in Chengdu

The product is equipped with a current transformer, which can have four windings per phase, with two for measurement and two for protection. According to customer needs, current transformers with a ratio of 100:5200:5400:5800:51000:51600:5 can be installed. The operating mechanism and connecting rod are installed inside the mechanism box, which is waterproof. To prevent the electrical control components inside the box from getting damp, an electric heater is installed inside the mechanism box.

Vacuum arc extinguishing chamber

According to different switch types, there are external shielded ceramic vacuum arc extinguishing chambers, middle sealed cup-shaped longitudinal magnetic field miniaturized vacuum arc extinguishing chambers, and internal sealed glass bubble arc extinguishing chambers. Their basic structures are as follows:

① Airtight insulation system (shell)

The airtight insulation system composed of a ceramic, glass or microcrystalline glass airtight insulation cylinder, a moving end cover plate, a fixed end cover plate, and a stainless steel corrugated tube is a vacuum sealed container. In order to ensure airtightness, in addition to strict operating procedures in sealing, it is also required that the material itself has low breathability and internal air release.

② Conductive system

Composed of a fixed conductive rod, a fixed running arc surface, a fixed contact, a moving contact, a moving running arc surface, and a moving conductive rod. There are roughly three types of contact structures: cylindrical contacts, transverse magnetic field contacts with spiral groove running arc surfaces, and longitudinal magnetic field contacts. At present, longitudinal magnetic field technology is used, and this type of arc extinguishing chamber has strong and stable arc breaking ability.

③ Shielding system

The shielding cover is an indispensable component in the vacuum arc extinguishing chamber, and there are various types of shielding covers such as the main shielding cover around the contact, corrugated tube shielding cover, and pressure equalization shielding cover. The function of the main shielding cover is to:

Prevent arc products from splashing onto the inner wall of the insulation shell during the arc ignition process, thereby reducing the insulation strength of the shell.

Improving the uniformity of electric field distribution inside the arc extinguishing chamber is beneficial for reducing local field strength and promoting the miniaturization of vacuum arc extinguishing chambers.

The condensed arc products absorb a portion of the arc energy, which helps to restore the strength of the gap medium after the arc.

Technical Parameter

Main technical parameters of circuit breaker

35KV Mid mounted ZW32 Outdoor Permanent Magnet Vacuum Circuit Breaker in Chengdu

Main mechanical parameters of circuit breakers

35KV Outdoor High Voltage Vacuum Circuit Breakerzone of application

Zhejiang Province, Jiangsu Province, Anhui Province, Shanghai City, Shandong Province, Hebei Province, Henan Province, Beijing City, Tianjin City, Shandong Province, Liaoning Province, Heilongjiang Province, Jilin Province, Inner Mongolia Autonomous Region, Shanxi Province, Shaanxi Province, Gansu Province, Autonomous Region, Xizang Autonomous Region, Qinghai Province, Yunnan Province, Guangxi Autonomous Region, Sichuan Province, Guizhou Province, Chongqing City, Hubei Province, Hunan Province, Jiangxi Province, Guangdong Province and other regions.