The VB5 circuit breaker is an independently innovated design with international advanced level, high reliability, and high DC component capability. It is widely used in power plants, grids, metallurgy, petrochemicals, and infrastructure projects such as railways, highways, and airports. The VB5 complies with IEC standards and fully meets Chinese national standards, industry standards, and State Grid requirements.

Main Features:

Passes 30,000 mechanical operations without replacing parts or adding lubrication

Rated current up to 4000A

High dielectric strength across open contacts, reaching 49kV

High DC component and closing capability: 75% DC component for rated short-circuit breaking current ≤31.5kA; 60% DC component for 40kA

Passes severe pollution level tests

Widely adopted in major national projects and large enterprises, such as Beijing Olympic venues, Three Gorges Project, Shanghai World Expo, and Qilu Petrochemical