ZN85-40.5 indoor high-voltage vacuum circuit breaker is a high reliability switchgear designed specifically for 40.5kV indoor distribution systems. It adopts vacuum arc extinguishing technology, with a short-circuit current breaking capacity of up to 40kA and a mechanical life of over 10000 operations. Compliant with GB/T 1984 and IEC 62271-100 standards, the modular handcart design supports quick insertion and maintenance, is compatible with KYN series switchgear, has a protection level of IP4X, and can withstand extreme environments ranging from -25 ° C to+70 ° C. Suitable for substations, industrial and mining power distribution, and data centers, providing a "zero SF6 emission, maintenance free" green power protection solution.