The invention discloses a primary and secondary fusion column mounted
circuit breaker, relates to the technical field of circuit breakers, and aims to solve the technical problem that the isolation
knife switch of the primary and secondary fusion column mounted
circuit breaker in the northwest region is easy to accumulate dust, and after the dust covers the isolation
knife switch, the device is easy to produce a
short circuit fault and affect the use effect of the isolation
knife switch. The invention comprises an air collection component and a
pollution cleaning component arranged above the
circuit breaker body, the air collection component and the
pollution cleaning component are coordinated, the air collection component comprises a wind receiving component and a
wind direction adjustment component, the wind receiving component comprises a support frame, a fixed plate one, a
bellows and a fixed plate two, the
wind direction adjustment component comprises an air block, a support column and a
weather vane, an air duct is arranged at the bottom of the air block, three ventilation ducts are arranged below the air duct, and the output end of the three ventilation ducts is connected to an air outlet duct. The invention has the advantages of avoiding the accumulation of a large amount of dust on the outer surface of the isolation knife switch, ensuring that the outer surface of the isolation knife switch can always maintain a relatively clean state during long-term use.