VZG-12GD Indoor 12kV Three-Station Vacuum Circuit Breaker

**Product Overview**

The VZG-12GD series indoor high-voltage three-station vacuum circuit breaker  

offers outstanding electrical and mechanical performance, along with a reliable  

and stable mechanism and long service life. The main circuit features fixed sealing  

columns, enhancing the environmental adaptability and insulation reliability of  

the breaker. Its exceptional mechanical and electronic performance extends its  

lifespan, making maintenance-free operation possible.

This circuit breaker is ideal for use in 3.6–12kV power systems, serving as both  

a power grid device and a protection and control unit for power systems in  

industrial and mining enterprises. It is suitable for various load types,  

frequent operations, and environments where short-circuit currents are  

frequently disconnected.

The product includes complete mechanical and electrical interlocking devices,  

ensuring high operational stability and reliability, thereby safeguarding both  

operators and electrical systems.

The breaker adopts fixed sealing technology and a modular frame structure that  

integrates compact high-performance components, such as isolation switches,  

sealed vacuum circuit breakers, grounding switches, sensors, interlocking  

mechanisms, and operating mechanisms. It is compatible with cabinet dimensions  

of 450×1000×1800 mm.

It features a rotary isolation switch with a visible fracture after opening.  

There is a mandatory mechanical interlock between the isolation switch, circuit  

breaker, and grounding switch to prevent misoperation.

Its modular operating mechanism allows for independent replacement or maintenance,  

with strong interchangeability. Operation can be manual or remotely controlled  

via AC or DC energy storage. Additionally, the cabinet door and grounding switch  

include a secure interlocking structure to ensure operator safety.

Technical Parameter

Installation size