Liyond Vacuum Circuit Breaker Series: Advanced Protection and Control

Liyond Electric's Vacuum Circuit Breaker (VCB) series represents the core of modern medium and high-voltage power distribution. As a leading vacuum circuit breaker manufacturer, we provide robust solutions designed to protect electrical networks by rapidly interrupting fault currents. By utilizing high-vacuum environments to quench electrical arcs, our VCBs offer superior insulation recovery and significantly higher reliability than traditional oil or air-based breakers.

Engineered for systems ranging from 12kV to 40.5kV, Liyond VCBs are essential for power plants, substations, and industrial distribution systems where safety, durability, and minimal maintenance are paramount.

Core Design and Safety Features

Liyond VCBs combine precision-engineered vacuum interrupters with high-performance operating mechanisms to ensure rapid arc extinction and superior dielectric recovery. Understanding the VCB breaker working principle is key to appreciating how this maintenance-free design prevents contact oxidation and allows for high switching frequencies and an extended operational life.

Available in both Indoor and Outdoor configurations, our VCBs are built to withstand diverse environmental conditions—from metal clad medium voltage switchgear to harsh outdoor pole-mounted installations—while offering flexible fixed or withdrawable mounting options to suit any system architecture.

Ordering Information

To ensure the accurate selection and configuration of your Liyond Vacuum Circuit Breaker, please provide the following technical specifications:

1. Basic Ratings: Specify the rated voltage (kV), rated current (A), and rated short-circuit breaking current (kA).

2. Installation Type: Indicate whether you require a fixed type or a withdrawable type (handcart version).

3. Operating Mechanism: Specify the control voltage for the charging motor and opening/closing coils (e.g., AC/DC 110V, 220V).

4. Phase Distance: Confirm the center-to-center distance between phases (e.g., 150mm, 210mm, 275mm) to ensure compatibility with your switchgear.

5. Secondary Interface: State the required number of auxiliary contacts (e.g., 58-pin or 64-pin secondary plugs).

Choosing the Liyond Vacuum Circuit Breaker Series ensures your grid is protected by industry-leading interruption technology and proven mechanical reliability.