Indoor High-Voltage Vacuum Circuit Breakers

For renovation projects with limited lateral space within the cabinet, we offer the VZN63A-12C side-mounted version. The side-mounted structure better adapts to the internal layout of fixed switchgear and also supports truck-mounted unit modifications. After parameter adjustments, it can be stably put into use in indoor sites at altitudes up to 2000 meters. The standard 12kV vacuum circuit breaker adopts an integrated, mature structure. It can be directly fixed for on-site installation or combined with a chassis trolley to form a withdrawable trolley unit. It is compatible with armored withdrawable switchgear. For industrial and mining enterprises and substations that frequently switch rated currents and frequently encounter short-circuit fault interruptions, this product can maintain consistently stable switching performance.

The 35kV vacuum circuit breaker features a specially optimized structure. The layered layout compresses the overall depth of the equipment. Composite insulation combined with independent epoxy insulation covers isolates the three-phase live components, controlling the phase-to-phase distance to 300mm. This helps switchgear manufacturers reduce the overall cabinet size. The arc-extinguishing chamber supports both imported and domestic options. Longitudinal magnetic field arc-extinguishing technology ensures reliable interruption under low current and asymmetrical fault current conditions. The spring operating mechanism achieves 10,000 maintenance-free operations, reducing the workload of substation operation and maintenance.

All our indoor vacuum circuit breakers undergo type testing before leaving the factory, enabling them to operate within a typical indoor temperature range of -15℃ to +40℃. They strictly conform to domestic GB standards and corresponding IEC international specifications. Our production system is ISO9001 quality management system certified. For special projects involving high altitudes and condensation pollution, we can provide customized parameter adjustment services. Whether it's for new power plant substations, power distribution upgrades in industrial and mining enterprises, or the procurement of complete sets of switchgear for new energy projects, we can provide complete parameter data and test reports to support customers in the early stages of project review and in-cabinet simulation selection. We can also provide delivery cycle guarantees and after-sales technical support for bulk orders, helping system integrators reduce equipment compatibility risks during project implementation.