The VHZ4 series vacuum circuit breaker incorporates a modular operating mechanism seamlessly integrated with the vacuum tube encapsulated pole, securely housed within a compact and robust metal enclosure. Equipped with primary and secondary connection systems, as well as a removable handcart component, this design ensures the overall circuit breaker is sturdy, flexible, and reliable. Renowned for its stability and long service life, the VHZ4 vacuum circuit breaker is compatible with NXSAFE removable cabinet types, NXGEAR fixed cabinet types, and designs from other manufacturers. It is ideally suited for controlling and protecting electrical systems such as transformers, lines, generators, motors, capacitor banks, and more. Widely applied across substations, distribution networks, heavy industries, infrastructure projects, transportation systems, and public buildings, the VHZ4 series showcases the versatility of its classic design, accommodating both front-mounted and removable installation configurations, a testament to the expertise of the Hengsmai vacuum circuit breaker technology.