3AV3 type mechanism can be used for ZN85-40.5 series indoor HV vacuum circuit breaker, its characteristic and proptery comform to standard GB1984 AC HV VACUUM CIRCUIT BREAKER and product requirements TECHNOLOGG CONDITION, each specification can meet or exceed relative IEC standard.

This mechanism has charging function and opening & closing operation by manual or motor; It is characterized by compact design, flexible and reliable operation with long life and less maintenance, it is suitable for many occasion especially for application under rigorous and frequently operation condition.