1.With the voltage of 40.5kV is three-phase AC, 50/60 Hz indoor power distribution equipment. 2.It is used for switchgear KYN61-40.5(Z) 3.It is accordance with GB1984 AC HV vacuum circuit breaker standard. 4.It effectively reduces the dimensions of VCB, the overall arrangement is reasonable and simple,with aesthetic appearance. 5.It has high reliable with characteristics of long life and easy maintenance and free-maintenance for operating mechanism. 6.Meet the Five Preventions function.