Huajidian Indoor Vacuum Circuit Breakers are withdrawable medium-voltage switchgear designed for use with indoor armored switchgear systems operating from 10kV to 24kV. Featuring a fully encapsulated epoxy resin vacuum interrupter and a modular trolley-type structure, these circuit breakers provide reliable protection for incoming feeders, outgoing feeders, transformer circuits, and distribution systems in enclosed substations.
Manufactured through Huajidian's standardized production partners in China, every indoor vacuum circuit breaker undergoes comprehensive quality control, including IQC, IPQC, and Factory Acceptance Testing (FAT). The products comply with IEC 62271-100, CE, and CB certification standards, ensuring dependable performance for industrial, commercial, and utility applications worldwide.
Huajidian also provides switchgear integration support, parameter selection, engineering consultation, certification assistance, and global logistics services. These circuit breakers are widely used in industrial parks, commercial buildings, data centers, manufacturing facilities, and urban substations throughout Southeast Asia, North America, the Middle East, and other international markets.
The breaker incorporates a three-position interlocking mechanism for service, test, and isolation positions. The system prevents switching operations while the breaker is in the isolation position, eliminating the risk of accidental operation during maintenance and ensuring compliance with international electrical safety standards.
A fully sealed epoxy resin vacuum interrupter eliminates internal air leakage while delivering excellent arc-extinguishing performance. The maintenance interval can reach up to eight years under normal operating conditions, significantly reducing lifecycle maintenance costs.
The plug-in secondary wiring connector enables quick installation and replacement without complicated rewiring, reducing switchgear assembly time for EPC contractors and improving maintenance efficiency.
With an operating noise level of no more than 65 dB, the circuit breaker is suitable for hospitals, office buildings, commercial complexes, and other noise-sensitive indoor environments.
Every withdrawable circuit breaker undergoes full-load temperature rise testing, operational performance verification, and factory acceptance testing before shipment to ensure consistent product quality and long-term operational reliability.
Standard products are fully compatible with mainstream KYN28A-12 and XGN15-12 medium-voltage armored switchgear. Huajidian also offers customized trolley dimensions based on customer drawings to accommodate non-standard switchgear cabinets.
Yes. An optional contact temperature monitoring sensor can be integrated into the vacuum interrupter. The system continuously transmits temperature data to the monitoring platform, enabling early detection of overheating and improving predictive maintenance capabilities.
Huajidian maintains inventory of semi-finished components for mainstream 12kV models. Standard production orders of up to 500 units can typically be completed within 20 working days after deposit confirmation. Expedited production is also available for urgent EPC and infrastructure projects.
Power System 12kV, 50Hz Three-Phase AC
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
Power System 33/35kV, 630A–1250A
Certifications IEC 62271-200, IEC 694, GB3906, DIN VDE 0670
