The invention discloses an intelligent operation device for detecting front
voltage and closing and separating a
brake automatically according to the front
voltage, as well as an automatic-reset abnormal
voltage protection intelligent miniature
circuit breaker comprising the intelligent operation device. The intelligent operation device comprises an automatic closing power device, an automatic closing power track switch
assembly, an automatic closing shield
toggle switch assembly, a multifunctional
logic control circuit board, an abnormal voltage
tripping device (shunt
tripping device), a power spring, a power needle and auxiliary contacts. After the intelligent operation device is combined with N pole and L pole of a standard MCB (
memory control block), the formed automatic-reset abnormal voltage protection intelligent miniature
circuit breaker has
overvoltage protection and low-voltage protection functions expect the functions like manual
brake closing or separating of a common MCB, overload protection,
overcurrent protection and so on; after the abnormal voltage protection is automatically separated, the breaker has automatic-reset and automatic closing functions when the voltage of the
system recovers normally; and the automatic closing action meets with that of the safety logic stipulations. With the advantages of simple and compact structure, economical lost, reliable function and wide suitable
current range, the intelligent operation device can solve the
bottleneck problem that the current abnormal voltage protection products cannot realize closing brakes automatically, or a various production combination scheme for realizing
brake closing automatically has high cost, complex structure and large volume.