A wiring protection device
A technology of protection devices and sensing devices, applied in emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve problems such as hidden dangers to users' personal safety, improve safety performance, ensure personal safety, The effect of effective security
Active Publication Date: 2015-09-09
SHANGHAI JIA AO ELECTRIC
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Problems solved by technology
When the ground wire of the power socket 101 is charged due to incorrect wiring of the socket 101, high grounding resistance or other reasons, if the plug connector 121 of the residual current protection device 103 and the jack connector 102 of the socket 101 are engaged, the water heater 102 The shell is also charged accordingly, which brings great hidden dangers to the personal safety of users.
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Embodiment Construction
[0020] In order to better understand the present invention, the following will be further described in conjunction with specific examples of the present invention, but they do not limit the present invention.
[0021] figure 2 Shown is a schematic diagram of the circuit structure of the wiring protection device according to an embodiment of the present invention. Such as figure 2 As shown, an electrical device 202 is connected to a power outlet 201 through a wire protection device 203 . The circuit in the figure includes a phase line 211, a neutral line 212, and a ground line 213, wherein the phase line 211 and the neutral line 212 constitute a power supply path. The power socket 201 includes a socket connector 220 . The wiring protection device 203 includes an error detection circuit 240 , a first blocking component 250 and a second blocking component 270 . When the error detection circuit 240 detects an error in the power supply path, it will generate an error detection ...
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The invention provides a wiring protection device, which comprises a power supply circuit, a ground wire circuit, an error detection circuit, a first interruption component and a second interruption component, wherein the error detection circuit is used for generating error detection signals according to the error of at least the power supply circuit; the first interruption component is connected with the error detection circuit and is used for interrupting the connection of the power supply circuit according to the error detection signals; and the second interruption component is connected with the power supply circuit and is used for closing the ground wire circuit when the power supply circuit is closed and for interrupting the ground wire circuit when the power supply circuit is opened. The invention has the advantages that the wiring protection device not only has residual current protection function but also can protect the ground wire connection.
Description
technical field [0001] The invention relates to a wiring protection device, in particular to a wiring protection device used for power plugs of electrical equipment. Background technique [0002] Leakage faults of household appliances can cause personal injury to users. Usually, a power plug with a residual current protection function is installed at the power input end of the household appliance. Generally, these existing power plugs with residual current protection function can detect the leakage current between the phase line and the ground, and disconnect the power circuit when the leakage current reaches a predetermined value. [0003] Many household appliances used today are connected by three wires, including phase wire, neutral wire and ground wire. The metal casing of the electrical appliance is often connected to the ground wire of the power supply. However, due to reasons such as substandard grounding resistance or incorrect connection of the ground wire, the gr...
Claims
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IPC IPC(8): H02H3/14H02H3/26
Inventor 李成力岳国兰
Owner SHANGHAI JIA AO ELECTRIC