Leakage protection plug
A leakage protection plug and pin technology, which is applied to emergency protection circuit devices, automatic disconnection emergency protection devices, circuits, etc., can solve problems such as dangerous accidents and failure of leakage protection plugs, and achieve the effect of improving reliability
Inactive Publication Date: 2015-11-04
SHENZHEN LONGWAY TECH
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- Description
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- Application Information
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Problems solved by technology
However, since the leakage protection plug shares an amplifying circuit and a silicon controlled rectifier, once these shared parts break down, the leakage protection plug will fail completely, which may cause dangerous accidents.
Method used
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Embodiment Construction
[0010] The present invention is described in further detail by the following examples.
[0011] see figure 1 As shown, a leakage protection plug includes a shell, a plug, a first phase wire 1 and a second phase wire 4, a first neutral wire 2 and a second neutral wire 5, a first ground wire 3 and a second ground wire 6 , the zero-sequence current transformer 17 through which the second phase line 4 and the second zero line 5 pass, a test circuit 12, an electromagnetic tripping and locking device, the electromagnetic tripping and locking device consists of an electromagnetic coil 14 and Its drive circuit, phase line contact switch 7, zero line contact switch 8, and ground line contact switch 9 are composed. The drive circuit of the electromagnetic coil 13 is mainly composed of the first thyristor 15, the first resistor 10, the first Amplifying circuit 16 is formed, is also provided with rectifying bridge 14, ground wire electrified detection inductor 18, the 2nd amplifying circ...
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A leakage protection plug comprises a shell, a plug pin, phase lines, zero lines, ground lines, a zero sequence current transformer, a test loop, an electromagnetic trip and lock device, a first amplification circuit, a second amplification circuit, a first silicon controlled rectifier, a second silicon controlled rectifier, a rectification bridge and a ground line live detection sensor, wherein a secondary winding output end of the zero sequence current transformer is connected with an input end of the first amplification circuit, a secondary winding output end of the ground line live detection sensor is connected with an input end of the second amplification circuit, and trigger output ends of the first amplification circuit and the second amplification circuit are respectively connected with controlled ends of the first silicon controlled rectifier and the second silicon controlled rectifier. The leakage protection plug is high in electrical control reliability, and people are ensured to use power more safely.
Description
technical field [0001] The invention relates to the technical field of electricity safety protection, in particular to an electric leakage protection plug. Background technique [0002] Chinese patent document CN1142618C discloses a leakage protection plug capable of detecting ground wire fault current. The leakage protection plug can detect whether there is a fault current in the ground wire when the ground wire is accidentally electrified due to an abnormal ground protection system, and the ground wire fault current reaches When the preset threshold value is reached, it will immediately cut off the phase wire, neutral wire and ground wire. However, since the leakage protection plug shares an amplifying circuit and a thyristor, once these common parts break down, the leakage protection plug will fail completely, thereby possibly causing dangerous accidents. Contents of the invention [0003] The purpose of the present invention is to provide a leakage protection plug wit...
Claims
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Login to View More IPC IPC(8): H01R13/713H01R13/70H01R13/66H02H3/32
Inventor 谭文兴史泽华
Owner SHENZHEN LONGWAY TECH