KYN61 (A) series of metal armoured switchgear and its ZN85 series indoor AC vacuum circuit breaker combined domestic operation specifications and operating environment requirements, set the goal to create international advance , based on years of vacuum circuit breakers and switchgear design experience, we developed a new generation of switchgear and vacuum circuit breakers, KYN61 (A) and ZN85A are small upgrade products of KYN61 and ZN85 , when ensuring phase spacing unchanged,we has conducted comprehensive upgrading and optimization from the size of the container type , structure layout, insulation design, chain design aspects .