Vacuum Circuit Breaker Working Principles and Advantages
2025-08-15
Introduction to Vacuum Circuit Breakers
Vacuum circuit breakers are critical components in modern electrical distribution systems, offering reliable protection against overloads and short circuits. This guide explores the working principles, technical specifications, and key advantages of SanGao Electric's vacuum circuit breakers. We'll examine product parameters, compare performance features, and provide professional insights for proper selection and application.
Working Principle of Vacuum Circuit Breakers
SanGao Electric's vacuum circuit breakers utilize advanced vacuum interruption technology to extinguish arcs effectively. When contacts separate under fault conditions, the high dielectric strength of vacuum (10^-6 to 10^-5 torr) prevents arc re-ignition. Our breakers feature:
-
Vacuum interrupters with copper-chromium contacts
-
Ultra-fast arc extinction (<10ms)
-
Permanent magnet actuators for reliable operation
-
Condition monitoring sensors
The vacuum environment provides 1000 times greater dielectric strength than air, enabling compact designs without compromising performance.
SanGao Electric Product Specifications
Technical Parameters
| Model | Voltage Rating | Current Rating | Breaking Capacity | Mechanical Life |
|---|---|---|---|---|
| SG-VCB12 | 12kV | 630-3150A | 25-40kA | 30,000 ops |
| SG-VCB24 | 24kV | 1250-4000A | 25-50kA | 20,000 ops |
| SG-VCB36 | 36kV | 1600-5000A | 31.5-63kA | 15,000 ops |
Performance Comparison
| Feature | SanGao Standard | Industry Average |
|---|---|---|
| Contact Erosion | <3mm/10,000 ops | 5-8mm |
| Operating Time | 25-45ms | 50-80ms |
| Maintenance Interval | 10 years | 5-7 years |
| Temperature Range | -30°C to +60°C | -15°C to +40°C |
Key Advantages of Vacuum Technology
SanGao Electric's vacuum circuit breakers provide significant benefits over traditional alternatives:
-
Superior Reliability
-
No gas leakage concerns
-
Sealed-for-life interrupters
-
Minimal contact wear
-
Enhanced Safety
-
No explosive gases
-
No fire risk
-
Reduced maintenance hazards
-
Economic Benefits
-
50% smaller footprint
-
30% lower lifecycle cost
-
Energy-efficient operation
-
Environmental Advantages
-
SF6-free design
-
Fully recyclable materials
-
Zero global warming potential
Applications and Selection Guide
Industry Applications
-
Power Distribution: Substations, switchgear
-
Industrial Plants: Steel mills, refineries
-
Renewable Energy: Solar farms, wind parks
-
Infrastructure: Airports, hospitals
Selection Criteria
-
Voltage Level: Match system voltage +15% margin
-
Current Rating: Consider 125% of max load
-
Breaking Capacity: Exclude prospective short circuit current
-
Environmental Conditions: Temperature, altitude, pollution
For technical specifications or application consulting:
📧 Email: [email protected]
With 25 years in electrical protection systems, I guarantee SanGao Electric vacuum circuit breakers deliver unmatched performance and reliability. Contact our engineering team today for your project requirements.