CN104917146A - Leakage protection plug with switching circuit indication device - Google Patents
Leakage protection plug with switching circuit indication device Download PDFInfo
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- CN104917146A CN104917146A CN201510242456.3A CN201510242456A CN104917146A CN 104917146 A CN104917146 A CN 104917146A CN 201510242456 A CN201510242456 A CN 201510242456A CN 104917146 A CN104917146 A CN 104917146A
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- ground wire
- circuit
- instrument transformer
- voltage
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
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Abstract
The invention discloses a leakage protection plug with a switching circuit indication device. The leakage protection plug comprises a tripper, a rectifying circuit, a silicon-controlled rectifier, a power supply indication lamp, a power supply step-down circuit, a first amplifying circuit, a second amplifying circuit, a first reverse isolation circuit, a second reverse isolation circuit and an over-temperature detection circuit. The plug is provided with a switching circuit indication lamp module. The second amplifying circuit is connected with a ground wire current transformer and a ground wire voltage transformer. A ground wire passes through the ground wire current transformer. Both ends of a primary winding of the ground wire voltage transformer are respectively connected with the ground wire and a zero wire. The ground wire current transformer and the ground wire voltage transformer are provided with switchers. The switching circuit indication lamp module is provided with an indication lamp switcher. The indication lamp switcher and the switchers are switchers. According to the invention, a currently selected leakage detection mode can be visually displayed; different modes are corresponding to different display modes; and functions of the leakage protection plug are further improved.
Description
Technical field
The present invention relates to electric heater electric security protector device field, particularly a kind of leakage protecting plug detected with ground wire high voltage.
Background technology
The leakage protecting plug of prior art can detect ground strip leakage current; or the situation of ground strip electrical leakage voltage; and leakage protecting plug can be disconnected timely and effectively; its principle utilizes change over switch selectively line current testing circuit or ground wire voltage testing circuit; but this leakage protecting plug can not show intuitively and currently have selected any electric-leakage detection circuit, the detection of electrical leakage pattern of current selection cannot be determined.
Summary of the invention
(1) technical problem that will solve
Object of the present invention will overcome above-mentioned shortcoming exactly, aims to provide a kind of leakage protecting plug detected with ground wire high voltage.
(2) technical scheme
For solving the problem, the present invention proposes a kind of leakage protecting plug detected with ground wire high voltage, comprise release, rectification circuit, controllable silicon, power supply indicator, power voltage step down circuit, first amplifying circuit, second amplifying circuit, first reverse isolation circuit, second reverse isolation circuit and overtemperature testing circuit, wherein, described rectification circuit one end connects release, the other end connects power supply indicator, power voltage step down circuit and controllable silicon, power voltage step down circuit is the first amplifying circuit, second amplifying circuit and overtemperature testing circuit are powered, first reverse isolation circuit is connected between the first amplifying circuit and controllable silicon, second reverse isolation circuit is connected between the second amplifying circuit and controllable silicon, first amplifying circuit is also connected with zero sequence current mutual inductor, this plug is also provided with change-over circuit indicating lamp module, described second amplifying circuit is connected with ground line current instrument transformer and ground wire voltage instrument transformer, described ground line current instrument transformer is passed by ground wire, the two ends of the primary coil of described ground wire voltage instrument transformer connect ground wire and zero line respectively, described ground line current instrument transformer and ground wire voltage instrument transformer are provided with change over switch, described change-over circuit indicating lamp module is provided with indicator light diverter switch, and described indicator light diverter switch and change over switch are change over switch.
Further, described change-over circuit indicating lamp module comprises resistance and the light-emitting diode of series connection, and when change over switch connects ground wire voltage instrument transformer, described change-over circuit indicating lamp module is in running order.
Further, described change-over circuit indicating lamp module comprises resistance and the light-emitting diode of series connection, and when change over switch connects ground line current instrument transformer, described change-over circuit indicating lamp module is in running order.
Further, described change-over circuit indicating lamp module comprises resistance, the first light-emitting diode and the second light-emitting diode, and when change over switch connects ground wire voltage instrument transformer, the first light-emitting diode is in running order; When change over switch connects ground line current instrument transformer, the second light-emitting diode is in running order.
Further, described change-over circuit indicating lamp module input connects rectification circuit.
Further, be provided with induced voltage between described ground wire and zero line and eliminate circuit and ground wire electrification indicating circuit.
Further, large resistance current-limiting circuit is provided with between described ground wire voltage primary winding of mutual inductor and ground wire.
(3) beneficial effect
Compared with prior art, the present invention has the following advantages: add the detection of electrical leakage pattern that can show current selection intuitively, the display mode that different pattern is corresponding different, the perfect further function of leakage protecting plug.
Accompanying drawing explanation
Fig. 1 is the module map of the leakage protecting plug that band ground wire high voltage of the present invention detects;
Fig. 2 is the circuit theory diagrams of the embodiment one of the leakage protecting plug that band ground wire high voltage of the present invention detects;
Fig. 3 is the schematic block circuit diagram of the leakage protecting plug embodiment two that band ground wire high voltage of the present invention detects;
Fig. 4 is the schematic block circuit diagram of the leakage protecting plug embodiment three that band ground wire high voltage of the present invention detects;
Fig. 5 is the leakage protecting plug light-emitting diode installation site schematic diagram that band ground wire high voltage of the present invention detects;
Fig. 6 is embodiment four ground line current instrument transformer indicator light circuit;
Fig. 7 is embodiment four line voltage instrument transformer indicator light circuit;
Fig. 8 is the two indicator light circuit of embodiment four ground line current instrument transformer and ground line current instrument transformer.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
Circuit theory diagrams as depicted in figs. 1 and 2, the leakage protecting plug that band ground wire high voltage of the present invention detects, comprises release L, rectification circuit is made up of diode D1, controllable silicon SCR, power supply indicator is made up of to resistance R6 LED1 and resistance R4, power voltage step down electricity routing resistance R18 to R23 forms, first amplifying circuit U1, second amplifying circuit U2, first reverse isolation circuit diode D3, second reverse isolation circuit diode D2 and overtemperature testing circuit, overtemperature testing circuit comprises voltage-reference U3, triode Q1, thermistor, resistance R14, resistance R15 and resistance R24, specifically see the circuit theory diagrams of Fig. 2, wherein, described rectification circuit one end connects release L, and the other end connects power supply indicator, power voltage step down circuit and controllable silicon SCR, power voltage step down circuit is the first amplifying circuit U1, second amplifying circuit U2 and overtemperature testing circuit are powered, first reverse isolation circuit is connected between the first amplifying circuit and controllable silicon SCR, second reverse isolation circuit is connected between the second amplifying circuit and controllable silicon SCR, first amplifying circuit is also connected with zero sequence current mutual inductor ZCT1, and this plug is also provided with change-over circuit indicating lamp module, described second amplifying circuit is connected with ground line current instrument transformer ZCT3 and ground wire voltage instrument transformer ZCT2, described ground line current instrument transformer ZCT3 is passed by ground wire E, the two ends of the primary coil of described ground wire voltage instrument transformer ZCT2 connect ground wire E and zero line N respectively, described ground line current instrument transformer ZCT3 and ground wire voltage instrument transformer ZCT2 is provided with change over switch K2-1, described change-over circuit indicating lamp module is provided with indicator light diverter switch K2-2, and described indicator light diverter switch K2-2 and change over switch K2-1 is change over switch.In the present embodiment, this plug is also provided with hookup.
Be provided with induced voltage between described ground wire E and zero line N and eliminate circuit and ground wire electrification indicating circuit, it is electric capacity C1 that induced voltage eliminates circuit, and ground wire electrification indicating circuit is neon lamp X1, resistance R25 and the electric capacity C20 of series connection.
Large resistance current-limiting circuit is provided with, i.e. large valued resistor R3 between described ground wire voltage primary winding of mutual inductor and ground wire.
As shown in Fig. 2 dotted line frame, described change-over circuit indicating lamp module comprises resistance R26 and the LED 2 of series connection, when change over switch connects ground wire voltage instrument transformer, namely change over switch K2-1 and indicator light diverter switch K2-2 is positioned at the position shown in Fig. 2, change-over circuit indicating lamp module is in running order, LED 2 is bright, and what point out the current connection of user is ground wire electrical leakage voltage detected state.
Embodiment two
The present embodiment is identical with principle with the basic structure of embodiment one, its difference is as shown in Fig. 3 dotted line frame, described change-over circuit indicating lamp module comprises resistance R26 and the LED 2 of series connection, when change over switch connects ground line current instrument transformer, namely change over switch K2-1 and indicator light diverter switch K2-2 is positioned at the position shown in Fig. 2, change-over circuit indicating lamp module is in running order, and LED 2 is bright, and what point out the current connection of user is ground wire leakage current detected state.
Embodiment three
The present embodiment is identical with principle with the basic structure of embodiment one to two, difference is as shown in Figure 4, described change-over circuit indicating lamp module comprises resistance R26, the first LED 2 and the second LED 3, these two kinds of LED lighting colors are different, when change over switch connects ground wire voltage instrument transformer, the first light-emitting diode is in running order; When change over switch connects ground line current instrument transformer, the second light-emitting diode is in running order.Achieve the mutual conversion of the display of ground wire leakage current detected state and the display of ground wire electrical leakage voltage detected state.
Embodiment four
The present embodiment is identical with principle with the basic structure of embodiment one to two, difference is: described change-over circuit indicating lamp module input connects rectification circuit, physical circuit schematic diagram is see Fig. 6, Fig. 7, Fig. 8, when wherein Fig. 6 is the work of ground line current instrument transformer, change-over circuit indicating lamp module lights, and plays suggesting effect; When Fig. 7 is the work of ground wire voltage instrument transformer, change-over circuit indicating lamp module lights, and plays suggesting effect; Fig. 8 is the two indicator light circuit schematic diagram of band, namely when ground line current instrument transformer works, connects the indicator light corresponding with ground line current instrument transformer bright, when ground wire voltage transformer works, connects the indicator light corresponding with ground wire voltage instrument transformer bright.
Integrated embodiment one to three; invention increases the detection of electrical leakage pattern that can show current selection intuitively; the display mode that different patterns is corresponding different; the perfect further function of leakage protecting plug, the LED of change-over circuit indicator light of the present invention is positioned at the position of this plug as Fig. 5 dotted line frame.
Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. the leakage protecting plug detected with ground wire high voltage, comprise release, rectification circuit, controllable silicon, power supply indicator, power voltage step down circuit, at least one amplifying circuit, with overtemperature testing circuit, wherein, described rectification circuit one end connects release, the other end connects power supply indicator, power voltage step down circuit and controllable silicon, power voltage step down circuit is that amplifying circuit and overtemperature testing circuit are powered, amplifying circuit is also connected with zero sequence current mutual inductor, it is characterized in that: described amplifying circuit is connected with ground line current instrument transformer and ground wire voltage instrument transformer, this plug is also provided with the change-over circuit indicating lamp module being used to indicate ground line current instrument transformer and/or ground wire voltage instrument transformer connection status, described ground line current instrument transformer is passed by ground wire, and the two ends of the primary coil of described ground wire voltage instrument transformer connect ground wire and zero line respectively, and described ground line current instrument transformer and ground wire voltage instrument transformer are provided with change over switch, described change over switch is used for switching between ground line current instrument transformer and ground wire voltage instrument transformer, change-over circuit indicating lamp module work simultaneously.
2. the leakage protecting plug of band ground wire high voltage detection according to claim 1, is characterized in that: when described change over switch connects ground wire voltage instrument transformer, described change-over circuit indicating lamp module is in running order.
3. the leakage protecting plug of band ground wire high voltage detection according to claim 1, is characterized in that: when described change over switch connects ground line current instrument transformer, described change-over circuit indicating lamp module is in running order.
4. the leakage protecting plug of band ground wire high voltage detection according to claim 1, it is characterized in that: described change-over circuit indicating lamp module comprises the first light-emitting diode and the second light-emitting diode, when change over switch connects ground wire voltage instrument transformer, the first light-emitting diode is in running order; When change over switch connects ground line current instrument transformer, the second light-emitting diode is in running order.
5. the leakage protecting plug that the band ground wire high voltage according to Claims 1-4 detects, is characterized in that: described change-over circuit indicating lamp module input connects rectification circuit.
6. the leakage protecting plug of band ground wire high voltage detection according to claim 5, is characterized in that: be provided with induced voltage between described ground wire and zero line and eliminate circuit and ground wire electrification indicating circuit.
7. the leakage protecting plug of band ground wire high voltage detection according to claim 6, is characterized in that: be provided with large resistance current-limiting circuit between described ground wire voltage primary winding of mutual inductor and ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242456.3A CN104917146A (en) | 2014-12-23 | 2015-05-12 | Leakage protection plug with switching circuit indication device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2014108105707 | 2014-12-23 | ||
| CN201410810570.7A CN104538925A (en) | 2014-12-23 | 2014-12-23 | Earth leakage protection plug with earth wire high voltage detection function |
| CN201510242456.3A CN104917146A (en) | 2014-12-23 | 2015-05-12 | Leakage protection plug with switching circuit indication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104917146A true CN104917146A (en) | 2015-09-16 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410810570.7A Pending CN104538925A (en) | 2014-12-23 | 2014-12-23 | Earth leakage protection plug with earth wire high voltage detection function |
| CN201510242456.3A Pending CN104917146A (en) | 2014-12-23 | 2015-05-12 | Leakage protection plug with switching circuit indication device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410810570.7A Pending CN104538925A (en) | 2014-12-23 | 2014-12-23 | Earth leakage protection plug with earth wire high voltage detection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN104538925A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896465A (en) * | 2015-09-28 | 2016-08-24 | 余姚市嘉荣电子电器有限公司 | Three-pole leakage protector and working method thereof |
| CN106253217A (en) * | 2016-09-07 | 2016-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device and method of work thereof |
| CN106340852A (en) * | 2016-11-09 | 2017-01-18 | 陈相如 | Circuit breaker preventing electric shock during immersion |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576603A (en) * | 2016-01-05 | 2016-05-11 | 余姚市嘉荣电子电器有限公司 | Double-input leakage protector |
| CN108549044B (en) * | 2018-03-27 | 2023-08-25 | 广东电网有限责任公司中山供电局 | Insulation line selection tester for direct current system of transformer substation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336471Y (en) * | 1998-01-10 | 1999-09-01 | 王心钤 | Leakage current breaker with open-phase power-on indication |
| US20070177325A1 (en) * | 2004-04-19 | 2007-08-02 | Sandro Zandonella Balco | Method and safety device for ground fault circuit |
| CN103825246A (en) * | 2014-02-20 | 2014-05-28 | 余姚市嘉荣电子电器有限公司 | Electricity leakage protecting plug |
-
2014
- 2014-12-23 CN CN201410810570.7A patent/CN104538925A/en active Pending
-
2015
- 2015-05-12 CN CN201510242456.3A patent/CN104917146A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2336471Y (en) * | 1998-01-10 | 1999-09-01 | 王心钤 | Leakage current breaker with open-phase power-on indication |
| US20070177325A1 (en) * | 2004-04-19 | 2007-08-02 | Sandro Zandonella Balco | Method and safety device for ground fault circuit |
| CN103825246A (en) * | 2014-02-20 | 2014-05-28 | 余姚市嘉荣电子电器有限公司 | Electricity leakage protecting plug |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896465A (en) * | 2015-09-28 | 2016-08-24 | 余姚市嘉荣电子电器有限公司 | Three-pole leakage protector and working method thereof |
| CN106253217A (en) * | 2016-09-07 | 2016-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device and method of work thereof |
| CN106340852A (en) * | 2016-11-09 | 2017-01-18 | 陈相如 | Circuit breaker preventing electric shock during immersion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104538925A (en) | 2015-04-22 |
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Application publication date: 20150916 |