ZN63s5(SD4-2)-12 indoor AChigh voltage vacuum circuit breaker (hereinaftereferred to as circuit breaker) is a three-phase AC 50H, rated voltage of 12kV indoorswitchgear, used for industrial and mining enterprises, powerplants and substationsfor electrical faclities contro It s used for protection and is suitable forplaces with frequent operations.

The circuit breaker meets the standard requirements of GB1984-89 "AC high voltage circuit breaker", JB3855.1996 "3,6-40. k indoor AC high voltage vacum circuitbreaker", DL403-91 "10-35kVindoor AC highvoltage circuitbreakerorderingtechnical requirements , And meetherelevant requirements ofiEC56(87 publication).

The circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker boly, which can be used as a fixed installation unit or a dedicatedpropulsion mechanism to form a handcart unit.