The Indoor High Voltage Vacuum Circuit Breaker (VCB) is a reliable medium-voltage switching device designed for three-phase AC power systems with a rated voltage of 24kV and rated currents from 630A to 1250A. Engineered for safe switching, protection, and control of electrical equipment, it is widely used in substations, power plants, industrial facilities, mining operations, and commercial distribution systems.

Featuring a modular design, vacuum interruption technology, and a compact operating mechanism, this circuit breaker delivers excellent electrical performance, long mechanical life, and low maintenance costs. It complies with IEC 62271-100, GB1984-2014, and other international standards, making it an ideal solution for modern medium-voltage power distribution networks.

• Reliable Vacuum Interruption – Provides excellent arc-extinguishing performance with long electrical endurance.
• Compact Modular Design – Simplifies installation, inspection, and maintenance.
• High Operational Safety – Equipped with a reliable mechanical interlocking system for secure operation.
• Maintenance-Friendly Structure – Reduced number of components lowers maintenance costs and improves reliability.
• Flexible Pole Options – Available with insulated cylinders or solid-insulated pole assemblies.
• Long Mechanical Life – Designed for frequent switching operations in demanding industrial environments.
• Standards Compliance – Manufactured according to IEC 62271-100, GB1984-2014, JB3855-1996, and DL403-2000.

The 24kV Indoor Vacuum Circuit Breaker is specifically designed for medium-voltage distribution systems requiring dependable switching and protection. Using advanced vacuum interruption technology, it effectively controls and protects cables, overhead transmission lines, transformers, capacitor banks, motors, and other electrical equipment.

Its modular operating mechanism reduces the number of mechanical components while improving reliability and ease of maintenance. The optimized interlocking system requires no additional adjustment during installation, significantly reducing commissioning time.

The circuit breaker is suitable for a wide range of applications, including utility substations, industrial plants, mining facilities, commercial buildings, renewable energy projects, and power generation systems where operational reliability and equipment safety are critical.

The Indoor Vacuum Circuit Breaker is widely used in:

• Utility substations
• Power generation plants
• Industrial manufacturing facilities
• Mining and mineral processing plants
• Commercial buildings
• Renewable energy projects
• Transformer substations
• Distribution switchgear panels
• Medium-voltage motor control systems
• Capacitor bank protection

This product complies with the following international and industry standards:

• IEC 62271-100 High-Voltage AC Circuit Breakers
• GB1984-2014 AC High-Voltage Circuit Breakers
• JB3855-1996 Indoor AC High-Voltage Vacuum Circuit Breakers (3.6–40.5kV)
• DL403-2000 Technical Conditions for Ordering High-Voltage Vacuum Circuit Breakers

Performance Classification:

• C2
• E2
• M2

The circuit breaker is designed to operate reliably under the following environmental conditions:

Frequently Asked Questions (FAQ)

1. What is a Vacuum Circuit Breaker (VCB)?

A Vacuum Circuit Breaker (VCB) is a medium-voltage switching device that uses a vacuum interrupter to extinguish electrical arcs during switching operations. It provides reliable protection and control for power distribution systems while offering long service life, low maintenance, and excellent interruption performance.

2. What are the advantages of a Vacuum Circuit Breaker?

Compared with conventional circuit breakers, Vacuum Circuit Breakers offer several advantages, including excellent arc interruption, compact design, long mechanical and electrical life, minimal maintenance, high operational reliability, and environmentally friendly operation without the need for insulating gases.

3. What applications is this 24kV Indoor Vacuum Circuit Breaker suitable for?

This circuit breaker is widely used in utility substations, industrial plants, power stations, mining facilities, commercial buildings, renewable energy projects, transformer substations, capacitor banks, motor protection systems, and medium-voltage switchgear panels.

4. What international standards does this product comply with?

Our Indoor High Voltage Vacuum Circuit Breaker complies with IEC 62271-100, GB1984-2014, JB3855-1996, and DL403-2000, ensuring reliable performance and compatibility with international medium-voltage power distribution systems.

5. What voltage and current ratings are available?

This model is designed for 24kV systems with rated currents ranging from 630A to 1250A. Customized configurations may also be available based on project requirements.

6. Can you provide OEM or ODM manufacturing services?

Yes. Changyun Intelligent provides comprehensive OEM and ODM services, including customized branding, electrical configurations, operating mechanisms, accessories, packaging, and technical specifications to meet customer and project requirements.

7. What is the typical service life of a Vacuum Circuit Breaker?

Under normal operating conditions and proper maintenance, a high-quality Vacuum Circuit Breaker can provide a service life of 20–30 years, with excellent mechanical and electrical endurance suitable for long-term operation.

8. Do you provide type test reports and technical documentation?

Yes. We can provide technical datasheets, factory test reports, and available type test documentation upon request to support project evaluation and bidding requirements.

9. What is your production lead time?

Standard production lead time is typically 15–30 days, depending on the order quantity, product configuration, and customization requirements. Please contact our sales team for the latest production schedule.

10. Why choose Changyun Intelligent as your Vacuum Circuit Breaker supplier?

Changyun Intelligent specializes in medium-voltage power distribution equipment, including Vacuum Circuit Breakers, Ring Main Units, SF₆ Load Break Switches, and eco-friendly switchgear. We offer IEC-compliant products, strict quality control, OEM & ODM services, competitive factory pricing, and professional technical support for customers worldwide.