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Leakage protection plug with switching circuit indication device

A leakage protection plug and circuit technology, which is applied in the direction of circuit devices, emergency protection circuit devices, parts of connection devices, etc., can solve the problems that the leakage detection circuit cannot be displayed intuitively, and the leakage detection mode cannot be determined, so as to achieve perfect functions. Effect

Inactive Publication Date: 2015-09-16
YUYAO JIARONG ELECTRONICS & ELECTRIC APPLIANCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The leakage protection plug in the prior art can detect the leakage current of the ground wire or the leakage voltage of the ground wire, and can disconnect the leakage protection plug in time and effectively. The principle is to use the switch to select the ground wire current detection circuit or the ground wire Voltage detection circuit, but this kind of leakage protection plug cannot visually display which leakage detection circuit is currently selected, and cannot determine the current leakage detection mode selected

Method used

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  • Leakage protection plug with switching circuit indication device
  • Leakage protection plug with switching circuit indication device
  • Leakage protection plug with switching circuit indication device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 and figure 2 As shown in the schematic diagram of the circuit, the leakage protection plug with ground wire high voltage detection of the present invention includes a release L, a rectifier circuit consisting of a diode D1, a thyristor SCR, a power indicator light consisting of LED1 and resistors R4 to R6 Composition, the power step-down circuit is composed of resistors R18 to R23, the first amplifying circuit U1, the second amplifying circuit U2, the first reverse isolation circuit diode D3, the second reverse isolation circuit diode D2 and the over-temperature detection circuit, the over-temperature The detection circuit includes voltage reference source U3, transistor Q1, thermistor, resistor R14, resistor R15 and resistor R24, see figure 2 The schematic diagram of the circuit, wherein one end of the rectification circuit is connected to the release L, and the other end is connected to the power indicator light, the power step-down circuit and the...

Embodiment 2

[0030] The basic structure and principle of this embodiment and Embodiment 1 are the same, and the differences are as image 3 As shown in the dotted line box, the conversion circuit indicator light module includes a resistor R26 connected in series and a light-emitting diode LED2. figure 2 In the position shown, the conversion circuit indicator module is in the working state, and the light-emitting diode LED2 is on, prompting the user to connect to the ground leakage current detection state.

Embodiment 3

[0032] The basic structure and principle of this embodiment and Embodiments 1 to 2 are the same, the difference is that Figure 4 As shown, the conversion circuit indicator module includes a resistor R26, a first light-emitting diode LED2 and a second light-emitting diode LED3. These two kinds of diodes emit light in different colors. In the working state; when the transfer switch is connected to the ground wire current transformer, the second light emitting diode is in the working state. The mutual conversion between the detection state display of the ground wire leakage current and the detection state of the ground wire leakage voltage is realized.

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Abstract

The invention discloses an earth leakage protection plug with an earth wire high voltage detection function. The earth leakage protection plug comprises a release, a rectifying circuit, a thyristor, a power indicator light, a power step-down circuit, a first amplifying circuit, a second amplifying circuit, a first reverse isolation circuit, a second reverse isolation circuit and an excess temperature detection circuit. The earth leakage protection plug is further provided with a switching circuit indicator light module. The second amplifying circuit is connected with an earth wire current transformer and an earth wire voltage transformer, wherein an earth wire penetrates through the earth wire current transformer, the two ends of a primary coil of the earth wire voltage transformer are connected with the earth wire and a null line respectively, and the earth wire current transformer and the earth wire voltage transformer are provided with a change-over switch; the switching circuit indicator light module is provided with an indicator light switchover switch, wherein the indicator light switchover switch and the change-over switch are linked switches. The earth leakage protection plug additionally achieves the function that the leakage detection mode which is currently selected can be displayed visually, different modes correspond to different display modes, and the function of the earth leakage protection plug is further improved.

Description

technical field [0001] The invention relates to the field of electric safety protection devices for electric water heaters, in particular to an electric leakage protection plug with high voltage detection for ground wires. Background technique [0002] The leakage protection plug in the prior art can detect the leakage current of the ground wire or the leakage voltage of the ground wire, and can disconnect the leakage protection plug in time and effectively. The principle is to use the switch to select the ground wire current detection circuit or the ground wire Voltage detection circuit, but this kind of leakage protection plug cannot visually display which leakage detection circuit is currently selected, and cannot determine the current leakage detection mode selected. Contents of the invention [0003] (1) Technical problems to be solved [0004] The purpose of the present invention is to overcome the above disadvantages, aiming to provide a leakage protection plug wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/32H01R13/66H01R13/717
Inventor 钱加灿
Owner YUYAO JIARONG ELECTRONICS & ELECTRIC APPLIANCE CO LTD