GTV1G-12 series indoor vacuum circuit breaker is rated voltage 12KV medium voltage vacuum circuit breaker , it is used as protection and control , unit of power network , device and power device of industrial and mining enterprise . The setting mainly used for power house , power grids , oil and chemical industry , metallurgy , city establishment , such as underground , airport , building , it is suits for indoor air insulation , switchboard KYN96-12. This product complies with standards of GB/T1984 , JB3855 , DI403, IEC6271-100&60694 .