| 摘要 |
The present invention discloses a leakage current detecting circuit-breaker with a flexible shield cord, which comprises a detection circuit, a trigger circuit and a tripping mechanism. The detection circuit comprises a flexible shield cord, a zero sequence current transformer and diodes connected in series. The flexible shield cord comprises a foil wrapped around outer insulating layers of a live line and a neutral line and a tinned copper wire between the outer insulating layers and the foil. The flexible shield cord senses an abnormal or fault signal of a power line, and the zero sequence current transformer amplifies the abnormal or fault signal to such an extent as to trigger the trigger circuit. The diodes comprise a fifth diode and a sixth diode; anodes of the fifth diode and the sixth diode are connected to each other, and cathodes of the fifth diode and the sixth diode are respectively connected to the live line and the neutral line. The leakage current detecting circuit-breaker is of low production cost and strong anti-interference capacity. |
| 主权项 |
1. A leakage current detecting circuit-breaker with a flexible shield cord comprising a detection circuit, a trigger circuit and a tripping mechanism, wherein the detection circuit detects and amplifies an abnormal or fault signal of a power line and transmits the amplified signal to the trigger circuit, so that the trigger circuit is turned on, thereby controlling the tripping mechanism to be disengaged and then disconnecting a current connection to a load end,
wherein the detection circuit comprises a flexible shield cord (225), a zero sequence current transformer (213) and diodes connected in series, the flexible shield cord (225) comprises a metal foil (301) wrapped around outer insulating layers of a live line and a neutral line and a tinned copper wire between the outer insulating layers and the foil, the flexible shield cord (225) senses the abnormal or fault signal of the power line, the zero sequence current transformer (213) amplifies the abnormal or fault signal to such an extent as to trigger the trigger circuit, the diodes comprise a fifth diode (107) and a sixth diode (112), anodes of the fifth diode (107) and the sixth diode (112) are connected to each other, and cathodes of the fifth diode and the sixth diode are respectively connected to the live line and the neutral line. |
