Usune 11kv 630a Vcb Vacuum Circuit Breaker is designed for indoor medium-voltage power distribution systems requiring stable protection and frequent switching performance. It combines vacuum interruption technology, solid insulation structure, and intelligent operating mechanisms to provide reliable protection for industrial plants, substations, power stations, and electrical facilities.
The Usune 11kv 630a Vcb Vacuum Circuit Breaker adopts a solid insulation structure that integrates the vacuum interrupter chamber, main conductive circuit, and insulation support into a sealed pole through advanced epoxy casting technology.
This integrated design improves insulation reliability and protects internal components from environmental influences such as dust and humidity. Compared with traditional structures, it reduces insulation failure risks and helps extend equipment service life.
The solid insulation design is combined with self-flowing ventilation technology to improve heat dissipation performance.
This structure effectively manages temperature rise during continuous operation and frequent switching, ensuring stable electrical performance in indoor medium-voltage applications.
The vacuum interrupter is the key component for safe current interruption. Usune 11kv 630a Vcb Vacuum Circuit Breaker uses vacuum arc interruption technology to achieve fast fault breaking, high electrical endurance, and stable operation.
The product is suitable for three-phase AC 50Hz systems with a rated voltage of 12kV and rated current of 630A, meeting the requirements of industrial power distribution and protection systems.
| Feature | Benefit |
| Vacuum interruption technology | Fast and reliable fault current breaking |
| Solid insulation structure | Improved environmental resistance |
| Long-life vacuum interrupter | Reduced maintenance frequency |
| Integrated design | Higher reliability and easier installation |
To reduce maintenance requirements, the circuit breaker can be equipped with a high-reliability permanent magnet operating mechanism.
This mechanism reduces mechanical wear and improves operating stability, making it suitable for applications requiring long service intervals.
The electronic control part adopts photoelectric proximity switches instead of traditional auxiliary switches and uses an intelligent control unit for improved operation accuracy.
This design reduces component aging problems and helps improve the overall reliability of the switching system.
The Usune 11kv 630a Vcb Vacuum Circuit Breaker supports both fixed installation and handcart configurations, providing flexibility for different project requirements.
It can be installed in KYN28A-12 (GZS) handcart switch cabinets and XGN fixed switchgear, making it suitable for various indoor medium-voltage systems.
| Installation Type | Application |
| Fixed installation | Permanent indoor switchgear systems |
| Handcart installation | Removable switchgear applications |
| KYN28A-12 (GZS) cabinet | Medium-voltage distribution systems |
| XGN switchgear | Fixed power distribution equipment |
In medium-voltage power systems, the ability to quickly isolate faults directly affects the safety of electrical equipment and continuous production. Usune 11kv 630a Vcb Vacuum Circuit Breaker is designed with reliable vacuum interruption technology to quickly break abnormal current conditions and protect downstream electrical equipment.
The vacuum interrupter provides excellent arc extinguishing performance, reducing the impact of short-circuit currents on switchgear components. This makes the circuit breaker suitable for industrial environments where power stability and equipment protection are critical.
Frequent switching operations can cause mechanical stress and electrical wear on conventional switching devices. The VS1-12 series vacuum circuit breaker adopts a highly reliable operating mechanism and optimized structural design to maintain stable performance during repeated opening and closing operations.
This feature is especially valuable for manufacturing plants, substations, and power distribution systems that require frequent switching and reliable control.
| Protection Feature | Value for Users |
| Fast vacuum arc extinction | Improves fault clearing speed |
| Reliable breaking capability | Protects electrical equipment from damage |
| Stable switching operation | Suitable for frequent operation conditions |
| High insulation performance | Enhances system safety |
For industrial users, equipment downtime and maintenance expenses directly affect operating costs. The integrated sealed pole design of Usune 11kv 630a Vcb Vacuum Circuit Breaker reduces the exposure of internal components to external environmental factors.
The long-life vacuum interrupter chamber, epoxy sealing structure, and maintenance-friendly operating mechanism help reduce routine inspection frequency and improve equipment availability.
Power distribution projects often require equipment that can be integrated into existing systems without major modifications. The circuit breaker supports flexible installation configurations and can be matched with common indoor switchgear systems.
Its compatibility with KYN28A-12 (GZS) handcart switch cabinets and XGN fixed switchgear allows engineering companies to select suitable configurations according to different project designs.
| Lifecycle Advantage | Project Benefit |
| Long service life components | Reduced replacement frequency |
| Maintenance-friendly structure | Lower operation costs |
| Flexible installation options | Easier system integration |
| Standardized design | Simplified project planning |
The VS1-12 series indoor high-voltage vacuum circuit breaker is widely used in industrial and energy projects where reliable switching and protection are required.
It is suitable for industrial and mining enterprises, power plants, substations, electrical facilities, and other medium-voltage distribution applications.
A domestic industrial power project required a reliable switching solution for a 12kV indoor distribution system. By applying the VS1-12 series vacuum circuit breaker with integrated solid insulation technology, the project achieved improved insulation stability, reduced maintenance requirements, and reliable operation under frequent switching conditions.
Usune follows strict quality management procedures and has obtained ISO 9001, ISO 14001, and ISO 45001 certifications.
The products comply with IEC and GB standards and have CE certification, ensuring reliable quality and international market compatibility.
| Parameter | Specification |
| Product Type | Indoor High Voltage Vacuum Circuit Breaker |
| Rated Voltage | 12kV |
| Rated Current | 630A |
| Frequency | 50Hz |
| Phase | Three-phase AC |
| Installation Type | Fixed / Handcart |
| Insulation Type | Solid Epoxy Sealed Pole |
| Application | Indoor Medium Voltage Switchgear |
A vacuum circuit breaker provides fast arc interruption, high insulation performance, long service life, and lower maintenance requirements.
It is mainly used in industrial plants, power stations, substations, mining enterprises, and indoor medium-voltage distribution systems.
The sealed pole structure, long-life vacuum interrupter, and reliable operating mechanism help reduce maintenance frequency.
Yes. It can be used with KYN28A-12 (GZS) handcart switch cabinets and XGN fixed switchgear.
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No. 298, Wei 17th Road, Yueqing Economic Development Zone, Yueqing, Wenzhou City, Zhejiang Province, China
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