VXB-12P series indoor AC high-voltage vacuum circuit breaker

The VXB-12P series indoor AC high-voltage vacuum circuit breakers are suitable for power systems with a rated voltage of 12kV and three-phase AC 50/60Hz. As a new generation of vacuum circuit breakers, it features a modular integrated spring-operated mechanism with superior mechanical performance. It is suitable for applications requiring frequent operation or multiple interruptions of short-circuit currents. Widely applicable in industrial plants, enterprises, power plants, substations, and other power systems, it controls and protects cables, overhead lines, transformers, generators, capacitor banks, motors, and more. The circuit breaker can function as a fixed installation unit or be equipped with a dedicated propulsion mechanism to form a draw-out unit. It is compatible with KYN28A-12(Z) switchgear and can also be installed in fixed switchgear such as XGN2-12 and GG-1A, featuring reliable mechanical interlocks. The mechanical and electrical performance of the VXB-12P series indoor AC high-voltage vacuum circuit breakers meets the M2-E2-C2 level specified in GB/T1984-2014.

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Product Features:

▲ Meets E2-C2-M2 performance requirements. Requires no maintenance during the specified number of short-circuit current interruptions; exhibits extremely low re-breakdown rates in specified capacitive current interruption type tests; boasts a mechanical life of 30,000 operations, with maintenance-free operation for the first 10,000 cycles, making it suitable for frequent operation.

▲ Superior insulation performance. Features an optimized arc-extinguishing chamber design with enhanced electric field optimization for both the arc-extinguishing chamber and primary conductive circuit, significantly elevating overall insulation levels. Suitable for altitudes up to 2000m.

▲ Convenient operation and maintenance. Unitized modular operating mechanism with rational structural layout facilitates maintenance.

▲ Stable performance. Advanced automated assembly and testing lines with specialized tooling ensure consistent product performance and reliability.

▲Excellent Interchangeability High machining precision of circuit breaker components and superior assembly consistency ensure excellent interchangeability between drawers.

Key Technical Specifications

Note: 1. When the rated short-circuit breaking current is 40 kA, the mechanical life is 20,000 operations; when 50 kA, the mechanical life is 10,000 operations. 2. Sequence 11 and 12 are rated parameters provided upon request.