The invention discloses a primary and secondary fusion pole-mounted intelligent
circuit breaker. The primary and secondary fusion pole-mounted intelligent
circuit breaker comprises a fault detection module, a protection action module, a reclosing module and an
information reporting module, the fault detection module collects multi-dimensional electrical quantity through a
current transformer and a
voltage transformer, and judges a fault and identifies the type in combination with a dynamic
normal range and a duration threshold. The protection action module calculates the fault
distance based on the correction impedance, judges whether to act or not by combining the current flow direction and the protection range, and selects a protection level according to the
fault severity; the reclosing module dynamically sets an
observation time window, distinguishes instantaneous or permanent faults through a retest
verification mechanism, and adaptively adjusts a reclosing strategy; and the
information reporting module uploads fault related information. According to the method, the problems of high misjudgment rate, poor protection selectivity, rigid reclosing logic and the like of a traditional
circuit breaker are solved, and the accuracy, quickness and self-healing capability of power distribution network fault
processing are remarkably improved.