| 摘要 |
The present invention discloses a dual-magnetic control type high-sensitive leakage protector, which includes zero-sequence mutual inductor 1, test button 2, control circuit chip IC 4, silicon controlled rectifier 5 and stationary contact 9, reset button assembly, electromagnetic assembly and stationary magnet 14. The said the reset button assembly which is inserted in the slide of circuit board 3 includes the reset button 6, link 8, reset spring 7 and movable magnet 11. The said electromagnetic assembly is combined to form an integral and fixed on a conducting strip 17. The end of the said conducting strip 17 is connected with the control circuit and another end of the said strip is provided with a movable contact matching with the said stationary contact 9. Two ends of said armature 13 are opposite to stationary magnet 14 and movable magnet 11 respectively and the opposite faces of stationary magnet 14 and movable magnet 11 have same polarity. Coil 12 is designed in such a way that when it is energized armature 13 will have polarity opposite to that of the corresponding face of stationary magnet 14. The magnetic intensity of movable magnet 11 is higher than that of stationary magnet 14. The present invention has the advantages of rapid breaking, high breaking capacity, high trip force, reliable working and small size. |
