ZW-40.5M Outdoor Sealed Permanent Magnet Circuit Breaker
ZW-40.5M Outdoor Sealed Permanent Magnet Circuit Breaker is a 40.5kV high-voltage vacuum switching device designed for reliable operation in outdoor power distribution systems. Featuring a permanently sealed structure and permanent magnet operating mechanism, it provides fast switching performance, stable control, and maintenance-free operation throughout its service life.
With advanced vacuum interruption technology, excellent environmental resistance, and high mechanical reliability, the ZW-40.5M is suitable for substations, overhead distribution lines, renewable energy collection systems, and industrial power networks requiring dependable protection, intelligent control, and long-term stable operation.
Get a QuoteOverview
The ZW-40.5M Permanently Sealed Vacuum Circuit Breaker is a 40.5kV outdoor switching device designed for reliable operation in high-voltage distribution networks. Equipped with a permanent magnet operating mechanism, it provides fast switching performance, stable control, and long-term maintenance-free operation compared with traditional operating mechanisms.
Featuring a fully sealed structure and advanced vacuum interruption technology, the ZW-40.5M offers excellent environmental adaptability, high mechanical reliability, and extended service life. It is widely used in outdoor overhead lines, substations, and power systems requiring dependable fault protection and low-maintenance operation.
Features
Permanent Magnet Operating Mechanism
The ZW-40.5M adopts an advanced permanent magnet actuator instead of conventional spring mechanisms, providing stable switching performance, high operating accuracy, and maintenance-free operation throughout its service life.
Fully Sealed IP65 Protection Design
The sealed enclosure effectively prevents moisture, dust, and environmental contaminants from entering the equipment. It is suitable for demanding outdoor applications, including coastal areas, high-altitude regions, and desert environments.
Environmentally Friendly SF6-Free Design
Using vacuum interruption technology, the breaker eliminates the need for SF6 gas and provides an eco-friendly solution with reliable insulation performance and reduced environmental impact.
High-Speed Switching Performance
With rapid opening and interruption capability, the ZW-40.5M supports fast protection schemes, automatic reclosing applications, and modern power networks requiring quick fault response.
Technical Data
| Item | Unit | Parameter | |
| Rated Voltage | kV | 40.5 | |
| Rated Current | A | 1250 / 1600 | |
| Rated Short Circuit Breaking Current | kA | 25 / 31.5 | |
| Degree of Protection | / | IP65 | |
| Mechanical life | Times | ≥30000 | |
Application Scenarios
The ZW-40.5M Permanently Sealed Vacuum Circuit Breaker is designed for reliable switching and protection in 40.5kV outdoor power systems. Its maintenance-free permanent magnet mechanism, sealed structure, and fast operating performance make it suitable for demanding applications, including:
- Renewable Energy Collection Systems
Used in wind farms, solar power plants, and renewable energy collector stations to provide reliable switching and fault protection. - Outdoor Substation Feeders
Suitable for substations located in mountainous, cold, or environmentally challenging areas requiring stable long-term operation. - Distribution Automation Networks
Supports remote control and intelligent operation for modern grid automation systems with enhanced reliability and fast fault response. - Industrial Power Protection
Ideal for industrial facilities with frequent switching operations, providing durable performance and reduced maintenance requirements.
Installation Guidelines
- Install the breaker on a suitable steel structure or concrete pole using compatible mounting brackets.
- Connect the incoming and outgoing power cables through the designated bushing terminals.
- Connect the remote control and auxiliary functions through the communication or signal interface according to the control system requirements.
- Check the insulation performance and ensure the electrical parameters meet the specified requirements before operation.
- Configure and test the permanent magnet operating mechanism through the local control unit or SCADA system.
