For companies and utilities seeking high performance, low maintenance, and long-term value, vacuum circuit breakers offer unmatched advantages. Leading the charge in this technology is Degatech Electric, a China-based manufacturer producing high-quality, IEC-compliant VCBs for global markets.
In this article, we’ll explore:
What a vacuum circuit breaker is and how it works
The key benefits of using VCBs in MV systems
How they compare to other breaker technologies
Why Degatech Electric is a trusted name in vacuum circuit breaker manufacturing
What Is a Vacuum Circuit Breaker (VCB)?
A vacuum circuit breaker is a type of electrical switching device specifically designed to interrupt fault currents and disconnect loads safely and quickly in medium voltage applications. The “vacuum” part refers to the arc-quenching medium used inside the breaker — a sealed vacuum chamber where the contacts open and close.
How It Works:
When a fault (like a short circuit or overload) is detected, the VCB opens its contacts inside a vacuum-sealed environment. Since a vacuum has an extremely high dielectric strength, the electric arc formed when the contacts separate is extinguished almost instantly. This rapid arc quenching protects the system from damage and ensures a quick return to normal operation.
Key Advantages of Vacuum Circuit Breakers
1. ? Superior Arc Interruption
The vacuum medium allows for fast and efficient arc extinction, minimizing damage to contacts and ensuring reliable performance over thousands of operations.
2. ⚙️ Low Maintenance Requirements
Unlike oil or air circuit breakers, VCBs have no consumable arc quenching media, meaning less wear and tear, fewer inspections, and minimal downtime.
3. ?️ Enhanced Safety
With no flammable oil or explosive gases involved, vacuum breakers are inherently safer, especially in populated or industrial environments.
4. ? Environmentally Friendly
Vacuum circuit breakers do not emit greenhouse gases or hazardous materials, making them a greener alternative to SF₆ or oil-based systems.
5. ? Compact & Space-Saving Design
VCBs are generally more compact than other MV breakers, allowing for easier installation in urban substations, industrial plants, and confined spaces.
6. ? Cost-Effective Over Time
Though the initial investment may be slightly higher, the low maintenance, long lifespan, and reduced operational risks make VCBs highly economical in the long run.
Vacuum Circuit Breaker vs Other Types
Type | Arc Medium | Maintenance Level | Safety | Environmental Impact | Common Use Range |
|---|---|---|---|---|---|
Vacuum (VCB) | Vacuum | Low | High | Minimal | 1–36 kV |
Air (ACB) | Air | Medium | Medium | Moderate | Low & Medium Voltage |
Oil (OCB) | Oil | High | Low | High | Legacy Systems |
SF₆ (Gas) | Sulfur Hexafluoride | Medium | Medium | High (GWP) | Medium & High Voltage |
As shown, vacuum circuit breakers strike the best balance between performance, safety, and sustainability, especially in the medium voltage range.
Applications of Vacuum Circuit Breakers
Vacuum circuit breakers are widely used in:
Industrial plants and factories
Power generation stations (renewable & conventional)
Utility distribution networks
Mining operations
Commercial buildings and infrastructure
Smart grid and automated substations
They are especially favored in settings where space is limited, safety is critical, and long-term reliability is paramount.
Why Choose Degatech Electric for Your VCB Needs?
Degatech Electric is a leading medium voltage switchgear and vacuum circuit breaker manufacturer based in China. With years of experience and a strong global customer base, the company specializes in:
High-performance VCBs (12kV, 24kV, 36kV)
Customized technical solutions
Compliance with international standards (IEC 62271-100, GB 1984, etc.)
Robust export and after-sales support
? Explore Degatech Electric’s full range of vacuum circuit breakers here
Their products are known for:
High breaking capacity
Long electrical life
Modular design for easy integration
Reliable performance in harsh environments
Final Thoughts: A Smart Investment in Power System Reliability
When it comes to protecting your medium voltage electrical infrastructure, vacuum circuit breakers offer the perfect blend of safety, efficiency, and longevity. Their ability to deliver fast fault interruption, minimal maintenance, and environmental responsibility makes them the preferred choice for modern power systems.
For businesses and engineers looking for a trusted, high-quality VCB supplier, Degatech Electric delivers performance you can rely on — backed by global standards and engineering excellence.
? Discover Degatech Electric’s vacuum circuit breaker solutions
? Contact us or request a quote through our official website
