Vacuum circuit breaker
When it comes to medium and high voltage power distribution, vacuum circuit breakers have become the preferred choice for modern electrical systems. These devices deliver superior performance, reliability, and safety compared to traditional circuit breakers. Below you'll find comprehensive information about our vacuum circuit breaker product line, including technical specifications, applications, and frequently asked questions.
Key Features of Our Vacuum Circuit Breakers
- Rated voltage: 12kV to 40.5kV
- Rated current: 630A to 4000A
- Short circuit breaking current: 20kA to 63kA
- Mechanical life: 10,000 to 30,000 operations
- Compact modular design for easy installation
- Low maintenance requirements
- Environmentally friendly (no SF6 gas)
Technical Specifications Table
| Parameter | Unit | Value |
|---|---|---|
| Rated Voltage | kV | 12-40.5 |
| Rated Current | A | 630-4000 |
| Short Circuit Breaking Current | kA | 20-63 |
| Short Time Withstand Current | kA/4s | 20-63 |
| Power Frequency Withstand Voltage | kV | 42-95 |
| Impulse Withstand Voltage | kV | 75-185 |
| Mechanical Life Span | Operations | 10,000-30,000 |
| Operating Mechanism | - | Spring/Electromagnetic |
| Operating Temperature | °C | -25 to +40 |
Applications
Our vacuum circuit breakers are widely used in:
- Power plants and substations
- Industrial power distribution systems
- Commercial buildings and infrastructure
- Renewable energy systems
- Mining and heavy industry applications
FAQ Section
Q: What makes vacuum circuit breakers superior to other types of circuit breakers?
A: Vacuum circuit breakers offer several advantages over other types. They have faster arc extinction due to the vacuum medium, require minimal maintenance, have a longer lifespan, and provide better reliability. The vacuum provides superior dielectric strength compared to air or SF6 at normal operating pressures, allowing for more compact designs.
Q: How often should vacuum circuit breakers be maintained?
A: Our vacuum circuit breakers are designed for minimal maintenance. We recommend visual inspections every 6 months and comprehensive maintenance every 3-5 years, depending on operating conditions. Key maintenance points include checking contact resistance, mechanism lubrication, and insulation resistance. The actual maintenance schedule should follow the manufacturer's recommendations and consider the specific operating environment.
Q: Can vacuum circuit breakers be used in outdoor applications?
A: Yes, our vacuum circuit breakers are available in both indoor and outdoor configurations. The outdoor versions feature weatherproof enclosures with appropriate IP ratings (typically IP54 or higher). They are designed to withstand various environmental conditions including rain, dust, and temperature extremes. However, proper installation following manufacturer guidelines is essential for reliable outdoor operation.
Installation Guidelines
- Ensure proper alignment during installation
- Follow torque specifications for all connections
- Verify insulation resistance before energizing
- Perform mechanical operation tests
- Check contact resistance values
When properly selected and maintained, our vacuum circuit breakers provide decades of reliable service in critical power distribution applications. For specific application requirements or custom solutions, please consult our technical team for professional guidance.
