Grounding Handcart indoor vacuum circuit breaker is an innovative switchgear designed specifically for safe operation of power systems, integrating grounding function and vacuum arc extinguishing technology. Suitable for indoor distribution systems ranging from 10kV to 40.5kV, the handcart modular design supports fast grounding switching and circuit breaker maintenance, with a short-circuit current breaking capacity of 31.5kA-40kA. Compliant with GB/T 1984 and IEC 62271-100 standards, with a mechanical life of over 10000 cycles and a protection level of IP4X, it is suitable for metal armored cabinets (such as KYN series) and is particularly suitable for power safety protection in industrial and mining enterprises, data centers, and substations, achieving "zero risk maintenance and second level response for operation".