What is an Indoor Vacuum Circuit Breaker?
An indoor vacuum circuit breaker is a type of switchgear used to protect medium-voltage electrical systems (typically from 3.3kV to 36kV). Unlike oil or SF₆ circuit breakers, it interrupts the current within a sealed vacuum chamber. When the contacts separate during a fault, the resulting electric arc is quickly extinguished because the vacuum medium has extremely high dielectric strength and minimal gas molecules.
This means indoor VCBs require almost no maintenance, produce no harmful emissions, and provide exceptional switching performance over a long lifespan.
Why Use Indoor VCBs in Power Systems?
Enhanced Safety and Reliability
Indoor vacuum circuit breakers minimize the risk of explosion, fire, or gas leakage. They are ideal for indoor substations, industrial facilities, and buildings where operator safety is a top priority.Eco-Friendly Operation
With growing global awareness of sustainable energy, vacuum interrupter technology offers a clean alternative to SF₆-based systems. It produces zero greenhouse gas emissions and requires no oil for arc extinguishing.Compact and Modular Design
Indoor VCBs can be integrated into compact medium voltage switchgear panels, making them perfect for limited installation spaces like commercial complexes or industrial control rooms.Low Maintenance and Long Life
The vacuum interrupter design ensures minimal contact erosion, so mechanical and electrical endurance remains excellent over thousands of operations.
Applications of Indoor Vacuum Circuit Breakers
Indoor VCBs are used across a wide range of sectors:
Industrial manufacturing plants
Power generation and distribution systems
Commercial buildings and smart campuses
Mining and transportation networks
Renewable energy systems
Why Choose Degatech Electric
At Degatech Electric, we specialize in the design and manufacturing of indoor vacuum circuit breakers and medium-voltage switchgear systems. Our VCBs are engineered with precision to ensure:
Stable performance even under harsh environmental conditions
Compact modular configurations
Compliance with international IEC and GB standards
Each Degatech Electric VCB is tested to deliver reliable service and long-term protection in 12kV–40.5kV networks.
Conclusion
The transition to eco-friendly, low-maintenance, and high-reliability equipment makes indoor vacuum circuit breakers a smart investment for modern power systems. As industries move toward sustainability, Degatech Electric continues to provide solutions that meet the evolving needs of safe and efficient electrical distribution.
? Learn more about our switchgear and vacuum circuit breaker solutions at https://chinadegatech.com/switchgear-products/.
