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Novel leakage protection method and novel leakage protection device with live and neutral wire identification function

A technology of protection device and identification device, applied in the direction of automatic disconnection emergency protection device, circuit device, emergency protection circuit device, etc., can solve the problem of no power supply, fire and neutral connection error prompt or correction, etc., to improve anti-interference ability and reliability, eliminate hidden dangers of accidents, and ensure the effect of normal work

Active Publication Date: 2014-08-27
吴伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing leakage protector does not have the function of prompting or correcting the wrong connection of the power supply and neutral wire

Method used

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  • Novel leakage protection method and novel leakage protection device with live and neutral wire identification function
  • Novel leakage protection method and novel leakage protection device with live and neutral wire identification function
  • Novel leakage protection method and novel leakage protection device with live and neutral wire identification function

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Effect test

Embodiment 1

[0059] image 3 It is embodiment 1 of the method and device of the present invention. image 3 structure and figure 2 Similar to the function and effect of figure 2 The description is the same. The difference is that the output of the live and neutral line identification device 1 includes a switch or contact with one pole and two throws, one pole is connected to the surface leakage signal pickup device 2, and the two throws are respectively connected to the electrical live wire L' and the electrical neutral wire N'. When the input terminal of the fire-neutral line identification device 1 is connected to the neutral wire N' of the electrical appliance and the live wire L' of the electrical appliance is connected to the neutral wire N of the power supply or the neutral wire N' of the electrical appliance is connected to the live wire L of the power supply due to the reverse connection of the live neutral wire of the power supply, the live neutral line When the identificatio...

Embodiment 2

[0061] Figure 4 It is embodiment 2 of the method and device of the present invention. Figure 4 structure and figure 2 Similar to the function and effect of figure 2 The description is the same. The difference is that the input terminal of the fire and neutral wire identification device 1 is connected to the electrical neutral wire N', and the output includes a fire and neutral line changeover switch 4 composed of a two-pole two-throw switch or contacts connected in series in the main circuit. When the live and neutral wires of the power supply are reversed so that the live wire L' of the electrical appliance is connected to the neutral wire N of the power supply or the neutral wire N' of the electrical appliance is connected to the live wire L of the power supply, the fire and neutral wire identification device 1 operates, and the fire and neutral wire conversion composed of two poles and two throw switches The action of the switch 4 makes the live wire L' of the electr...

Embodiment 3

[0064] figure 2 together with Figure 5 and Figure 6 (a) Embodiment 3 constituting the method and apparatus of the present invention. Such as figure 2 The shown leakage protection device of the present invention with fire and zero line identification function, wherein the structure of the fire and zero line identification device 1 is as follows Figure 5 As shown: the current limiting element Z and the light emitting element B1 (neon tube) are connected in series, one end is connected to the electrical live wire L' or the electrical neutral wire N', and the other end is connected to the touch electrode A. The touch electrode A is a conductor embedded in the surface of the toggle handle of the toggle reset switch K, or a waterproof jacket made of conductive rubber that is sleeved on the push button reset switch K button, such as Figure 6 As shown in (a), the user must toggle or press the reset switch K when using the leakage protection device, so as to touch the touch e...

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Abstract

A leakage protection method and device having a live / neutral wire identification function that identify the live wire and neutral wire of an input power source by means of a live / neutral wire identification device 1. If the live / neutral wires are discovered to be erroneously connected, the connections between the live wire L' and the neutral wire N' of an electric device and the live wire L and the neutral wire N of the power source are immediately adjusted directly or indirectly; or, the connection of a surface leakage signal pickup device 2 is adjusted; or, a main circuit switch K is made such that the main circuit switch cannot close the circuit or that the main circuit switch breaks the circuit immediately after closing the circuit, so that a user must correct the connections of the live / neutral wires of the power source; the surface leakage signal pickup device 2 is arranged such that said device is always connected to the neutral wire N of the power source and to the surface F of the electric device, so as to always monitor the electric potential of the surface F of the electric device over the neutral wire N of the power source. When the electric device surface leaks electricity, the leakage signal pickup device 2 immediately drives an electromagnetic tripping device 3 to break the main circuit switch 3, thereby breaking the connection between the electric device and the power source. The method and device of the present invention can remove leakage before a human body experiences an electric shock, thereby eliminating potential accidents; leakage accidents due to connection errors are prevented; electric device surface leakage can be effectively prevented even when the electric device is not connected to ground.

Description

technical field [0001] The invention relates to an electric leakage protection method and device, in particular to an electric leakage protection method and device with the function of identifying fire and neutral wires. Background technique [0002] Compared with the "residual current device" (RCD) based on the monitoring of residual current, the "surface leakage protection device" (FLPD) based on the protection of electrical surface leakage can cut off the connection between the electrical appliance and the power supply before the human body touches the leakage object. Change passive "electric shock protection" to active "leakage protection". Patent document 201120482689.8 "Detection and protection system for electric leakage on the surface of electrical appliances" provides a specific implementation plan for "surface leakage protection device". The surface leakage protection device detects the potential difference between the surface of the electrical appliance and the n...

Claims

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Application Information

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IPC IPC(8): H02H3/32
CPCH02H3/00H05B33/08H02H11/00H02H11/002H02H3/14H02H3/16H02H3/162
Inventor 吴伟
Owner 吴伟
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