ZW-40.5 Vacuum Circuit Breaker | 40.5kV Compact Outdoor Breaker
ZW-40.5 Vacuum Circuit Breaker | 40.5kV Compact Outdoor Breaker is a high-voltage outdoor switching device designed for 33kV–40.5kV power distribution systems. Featuring advanced vacuum interruption technology and a compact sealed structure, it provides reliable fault protection, efficient switching performance, and stable operation in demanding outdoor environments.
With flexible installation options and excellent environmental adaptability, the ZW-40.5 is suitable for substations, overhead distribution networks, renewable energy projects, and industrial power systems requiring safe operation, low maintenance, and long service life.
Get a QuoteOverview
The ZW-40.5 Outdoor Vacuum Circuit Breaker is a compact and fully sealed switching device designed for 33kV–40.5kV medium-voltage outdoor distribution systems. Utilizing advanced vacuum interruption technology combined with reliable gas insulation, it delivers stable performance, efficient arc extinction, and long-term operation with minimal maintenance.
Designed for pole-mounted and platform-mounted installations, the ZW-40.5 supports intelligent control functions, remote operation, and fault monitoring. It is widely used in substations, overhead distribution networks, and smart grid applications requiring reliable protection and enhanced system automation.
Features
- High Voltage Rating
Rated voltage up to 40.5kV, suitable for 33kV medium-voltage outdoor distribution systems. - High Current Capacity
Available with rated current options of 1250A and 1600A to meet different power distribution requirements. - Advanced Vacuum Interruption Technology
Utilizes vacuum arc-extinguishing technology to achieve fast fault interruption, reliable switching performance, and long electrical service life. - Sealed Insulation Structure
Features a solid-sealed design combined with a sealed gas insulation chamber, providing excellent insulation performance and environmental protection. - Compact Three-Phase Integrated Design
The compact enclosure structure simplifies installation while ensuring reliable mechanical strength and outdoor durability. - Flexible Control Configurations
Supports manual operation, motorized control, and remote operation through FTU systems for smart grid applications. - Versatile Installation Options
Suitable for both pole-mounted installation and box-type platform-mounted configurations, offering flexibility for different project requirements.
Technical Data
| Item | Unit | Parameter | |
| Rated Voltage | kV | 40.5 | |
| Rated Current | A | 1250 / 1600 | |
| Rated Short Circuit Breaking Current | kA | 25 / 31.5 | |
| Rated Peak Withstand Current | 63 / 80 | ||
| Power Frequency Withstand | kV | 95 / 185 | |
| Control Voltage | V | DC 110V / 220V (optional) | |
| Mechanical life | Times | ≥10000 | |
| Electrical Life | / | ≥ 30 operations @ full fault | |
| Closing Time | ms | ≤ 60ms | |
Standards and Certifications
The ZW-40.5 Outdoor Vacuum Circuit Breaker is manufactured in accordance with relevant international and national standards to ensure reliable performance, safety, and quality consistency.
- GB 1984 – AC High-Voltage Circuit Breaker Standard
- IEC 62271-100 – High-Voltage AC Circuit Breaker Standard
- ISO 9001 / ISO 14001 / ISO 45001 – Quality, Environmental, and Occupational Health & Safety Management Systems
- CE Compliance – Supported by complete type test documentation
Application Scenarios
Designed for reliable operation in 33kV–40.5kV outdoor power systems, the ZW-40.5 Outdoor Vacuum Circuit Breaker is suitable for various distribution and automation applications.
- Rural Medium-Voltage Distribution Networks
Provides dependable switching and fault protection for outdoor 33kV/35kV distribution lines in remote areas. - Pole-Mounted Fault Interruption and Isolation
Enables rapid fault clearing and safe line isolation for overhead distribution systems. - Smart Grid Sectionalizing Applications
Supports remote control and automation functions for intelligent distribution networks. - Outdoor Substations and Renewable Energy Systems
Suitable for substations, wind farms, solar power plants, and other renewable energy connection points. - Harsh Environmental Installations
Designed for reliable operation in high-humidity, dusty, coastal, and other challenging outdoor environments.
