Ground wire live-line detection display circuit and electric device
A technology for ground wire live and electrical equipment, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of inability to ensure the safety of the insulation voltage of the neutral wire and the ground wire, diode breakdown, etc., to achieve long life, avoid The effect of misuse
Inactive Publication Date: 2016-05-11
SUZHOU ELE MFG
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Problems solved by technology
In this circuit, the ground wire charged display circuit is composed of resistor R1, diode D1, and light-emitting diode LED connected in series between the neutral wire and the ground wire. If a power frequency voltage of 1500V is applied, it will cause the diode D1 and / or LED to be broken down
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[0025] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0026] Embodiments of the present invention are described with reference to the drawings.
[0027] image 3 It is a schematic diagram of a circuit module according to an embodiment of the present invention.
[0028] Compared to figure 1 in the circuit, image 3 The detection and display circuit 30 connected between the neutral line and the ground line includes a display unit DS and a voltage limiting unit PV. The display unit DS is used...
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The invention provides a ground wire live-line detection display device comprising a display unit used for transmitting indication signals; and a voltage limiting unit. The voltage limiting unit and the display unit are serially connected between the ground wire and the neutral wire in a coupled manner, when the voltage limiting unit can be connected by adopting the voltage difference between the ground wire and the neutral wire, the predetermined voltage drop can be generated by the voltage limiting unit. The display unit can be used to determine whether the indication signals can be transmitted based on the voltage difference between the ground wire and the neutral wire and the predetermined voltage drop generated by the voltage limiting unit. By adopting the technical scheme, the circuit having advantages of long service lifetime, high reliability, and ability of indicating the ground wire connection error or the live-line ground wire can be provided, and by adopting the circuit, the safe insulation voltage between the neutral wire and the ground wire can be guaranteed.
Description
technical field [0001] The invention belongs to the field of household circuits, in particular to a ground wire electrification detection and display circuit and electrical equipment. Background technique [0002] With the popularization of electricity, more and more attention has been paid to the safety of electricity use, especially when the live wire (L), neutral wire (N), and ground wire (PE) of electrical products are connected incorrectly or the ground wire is charged, it is easy to cause electric shock hazard or property damage. loss. [0003] Existing products also have functions such as preventing wiring errors or displaying live wires, figure 1 It is a schematic diagram of a circuit with a ground charged display function in the prior art. In this circuit, the consumer R L It is connected with the zero line and the fire line through the switch K, and at the same time, the shell G of the electrical appliance is also connected with the ground wire through the switc...
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IPC IPC(8): G01R31/02
Inventor 李成力聂胜云
Owner SUZHOU ELE MFG