Leading Indoor Vacuum Circuit Breaker Manufacturer

The Usune Vacuum Circuit Breaker 12kv 24kv is a medium-voltage switching solution engineered for reliable installation, accurate commissioning, and stable long-term operation. With flexible 12kV and 24kV voltage options, dependable vacuum interruption technology, professional installation procedures, and strict international certifications, it delivers a safe and reliable circuit-breaking solution for medium-voltage power systems and electrical engineering projects worldwide.

Usune VS1-12 Indoor Vacuum Circuit Breaker is a 12kV handcart-type medium-voltage switching solution designed for modern indoor switchgear. It combines flexible cabinet compatibility, precise handcart positioning, reliable interlocking protection, and stable vacuum interruption technology to improve power system safety and operational efficiency.

The Usune Vacuum Circuit Breaker 630a is an indoor, 12kV, 50Hz medium-voltage breaker rated at 630A, with selectable short-circuit breaking capacity of 20, 25, 31.5 or 40kA and a 20,000-operation mechanical life. It protects transformers, motors, cable feeders and capacitor banks in 10kV distribution systems, and is manufactured to IEC and GB switchgear standards with CE marking.

The Usune Vacuum Circuit Breaker 1250a carries 1250A continuously at 12kV, which places it on the incomer, the bus-section or the transformer main rather than on an outgoing feeder. Those positions demand more than current capacity: the current path must stay cool at full load, the frame must hold together under a close-in fault, and the panel around it has to be sized to match. Fixed and withdrawable versions, 20–40kA breaking, IEC and GB standards, CE marked.

Engineered as a high-performance medium-voltage switching apparatus, the Usune 15 Kv 1250a Vcb Vacuum Circuit Breaker serves industrial power distribution and energy infrastructure duties. Its 1250 A rating, dependable vacuum-based current interruption, robust tolerance to challenging environments, and conformity with international standards make it a safe, stable, and efficient choice for demanding electrical networks, including plant distribution systems and energy facilities.

The Usune 11kv 630a Vcb Vacuum Circuit Breaker integrates solid insulation, high-performance vacuum interruption, intelligent control, and a flexible installation design, delivering a dependable solution for medium-voltage power distribution systems. Backed by ISO 9001, ISO 14001, and ISO 45001 management systems as well as IEC, GB, and CE certifications, it meets the safety, efficiency, and long-term reliability requirements of industrial power projects worldwide.