ZN85-40.5 Indoor High-Voltage Vacuum Circuit Breaker

The ZN85‑40.5 series indoor high‑voltage vacuum circuit breaker (hereinafter referred to as the "circuit breaker") is designed for three‑phase AC power systems with a frequency of 50 Hz and a rated voltage of 40.5 kV. It is suitable for industrial and mining enterprises, power plants, and substations, where it serves to switch load currents, overload currents, and fault currents. The circuit breaker adopts an upper–lower arrangement of the interrupter chamber and operating mechanism, effectively reducing its overall depth. The three‑phase arc‑extinguishing chambers and associated live parts are isolated by three independent epoxy‑resin insulating cylinders, forming a composite insulation structure that meets the required air clearance and creepage distance under normal operating conditions, while also significantly minimizing the device's footprint.

Three-position vacuum circuit breaker

The VSD-12GD series indoor high-voltage three‑position vacuum circuit breaker boasts superior electrical and mechanical performance, with a reliable and stable operating mechanism and an extended service life. Its main circuit employs solid‑encapsulated pole assemblies, enhancing environmental adaptability and insulation reliability. With dependable mechanical and electronic characteristics and prolonged mechanical and electronic lifespans, the circuit breaker achieves maintenance‑free operation. It is suitable for 3.6–12 kV power systems and features comprehensive mechanical and electrical interlocking devices, delivering exceptional operational stability and reliability to ensure the safety of both personnel and equipment, as well as safe electricity usage.

Modular Indoor Vacuum Circuit Breaker

The modular indoor vacuum circuit breaker is an indoor switchgear rated for three-phase AC, 50 Hz, with a rated voltage of 12 kV. It is suitable for the control and protection of industrial and mining enterprises, power plants, substations, and electrical installations, and is particularly well suited for applications involving frequent operations. Featuring an integrated operating mechanism and circuit breaker body, it can be configured either as a fixed installation unit or equipped with a dedicated push‑in mechanism to form a withdrawable‑type unit. The main circuit section may incorporate an integral solid‑encapsulated pole assembly, enabling compact size, high reliability, and maintenance‑free operation; it is compatible with center‑mounted switchgear such as the KYN28A‑12 (GZS1).