CN105576603A - Double-input leakage protector - Google Patents
Double-input leakage protector Download PDFInfo
- Publication number
- CN105576603A CN105576603A CN201610006937.9A CN201610006937A CN105576603A CN 105576603 A CN105576603 A CN 105576603A CN 201610006937 A CN201610006937 A CN 201610006937A CN 105576603 A CN105576603 A CN 105576603A
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- China
- Prior art keywords
- circuit
- amplifying circuit
- output
- integrator
- latch
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/325—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors involving voltage comparison
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a double-input leakage protector, which comprises a power voltage stabilizing circuit, a control output circuit, an amplifying circuit, an integrator I, an integrator II, a latch I, a latch II and a voltage reference circuit, wherein the power voltage stabilizing circuit supplies electricity to the control output circuit, the amplifying circuit and the voltage reference circuit; the amplifying circuit comprises a first amplifying circuit and a second amplifying circuit, which independently work; the first amplifying circuit and the second amplifying circuit are connected to an output end of the voltage reference circuit to obtain a reference comparison voltage; the first amplifying circuit is connected with the integrator I; the second amplifying circuit is connected with the integrator II; the integrator I is connected with the latch I; the integrator II is connected with the latch II; and the output ends of the latch I and the latch II are connected with the control output circuit respectively. The invention provides a circuit structure with two independent amplifying circuit output controls; two paths of output are independently controlled and are not affected with each other; and other control modules can be expanded, so that intelligent detection and control purposes are achieved.
Description
Technical field
The present invention relates to electrical safety field, particularly relate to a kind of dual input earth leakage protective device.
Background technology
Existing earth leakage protective testing circuit has single input to detect and dual input detects two kinds, the two-way output of the amplifying circuit wherein in dual input testing circuit all merges into an output as regulating and controlling, the hidden danger of this control mode is: when an amplifier road is wherein amplified by when causing another road cisco unity malfunction or damage when the output that amplifying circuit merges when output damages, earth leakage protective device will lose efficacy; Because power utilization environment is more and more severe, current ground wire abnormal protection can not meet conventional demand for control, and therefore earth leakage protective device needs intelligent future development, and ground wire abnormal protection needs expansion to detect and Intelligent Recognition can realize omnibearing stereo protection.
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 dual input earth leakage protective device.
(2) technical scheme
For achieving the above object, dual input earth leakage protective device of the present invention, comprise power supply stabilization circuit, control output circuit, amplifying circuit, integrator one, integrator two, latch one, latch two and voltage reference circuit, wherein, power supply stabilization circuit is powered for controlling output circuit, amplifying circuit and voltage reference circuit, amplifying circuit comprises the first amplifying circuit and the second amplifying circuit that work alone, and the first amplifying circuit is connected the output of voltage reference circuit to obtain benchmark comparative voltage with the second amplifying circuit; First amplifying circuit connects integrator one, second amplifying circuit and connects integrator two, and integrator one connects latch one, and integrator two connects latch two, latch one and latch two output connection control output circuit respectively, and controls this control output circuit.
Further, comprise output T1, output T1 connects timing element one.
Further, comprise output T2, output T2 connects timing element two.
Further, also comprise ground wire abnormality detection indicating circuit, ground wire abnormality detection indicating circuit is arranged between zero line side and ground terminal.
Further, also comprise the zero sequence current mutual inductor for detecting zero live wire electric leakage, and for detecting the ground wire instrument transformer of ground wire electric leakage.
(3) beneficial effect
Compared with prior art; technical scheme of the present invention has the following advantages: provide a kind of and have the circuit structure that two independent amplifying circuits export control; achieve intelligent Detection & Controling purposes, solve the defect of line current type earth leakage protective device Frequent trip when socket effective grounding traditionally.
Accompanying drawing explanation
Fig. 1 is the module map of the embodiment one of dual input earth leakage protective device of the present invention;
Fig. 2 is the embodiment one basic circuit schematic diagram of dual input earth leakage protective device of the present invention;
Fig. 3 is the embodiment one concrete structure circuit theory diagrams of dual input earth leakage protective device of the present invention;
Fig. 4 is the module map of the embodiment two of dual input earth leakage protective device of the present invention;
Fig. 5 is the embodiment two basic circuit schematic diagram of dual input earth leakage protective device of the present invention;
Fig. 6 is the embodiment two concrete structure circuit theory diagrams of dual input earth leakage protective device of the present invention.
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
Fig. 1 is the circuit module figure of this protector, dual input earth leakage protective device of the present invention, comprise power supply stabilization circuit, control output circuit, amplifying circuit, integrator one, integrator two, latch one, latch two and voltage reference circuit, wherein, power supply stabilization circuit is powered for controlling output circuit, amplifying circuit and voltage reference circuit, amplifying circuit comprises the first amplifying circuit and the second amplifying circuit that work alone, and the first amplifying circuit is connected the output of voltage reference circuit to obtain benchmark comparative voltage with the second amplifying circuit; First amplifying circuit connects integrator one, second amplifying circuit and connects integrator two, and integrator one connects latch one, and integrator two connects latch two, latch one and latch two output connection control output circuit control this control output circuit respectively.
Fig. 2 is the circuit diagram of the basic structure of amplifying circuit of the present invention, power supply stabilization circuit and control output circuit, wherein, control output circuit and comprise release S1-S2, and controllable silicon SCR, controllable silicon SCR trigger electrode is controlled by the first amplifying circuit and the second amplifying circuit, controllable silicon SCR is for controlling release S1-S2, and diode D is as power rectifier circuit element.
Timing element one of the present invention and timing element two are timing capacitor.
Also comprise ground wire abnormality detection indicating circuit, ground wire abnormality detection indicating circuit is arranged between zero line side N and ground terminal E.
Also comprise the zero sequence current mutual inductor ZCT1 for detecting zero live wire electric leakage, and for detecting the ground wire instrument transformer ZCT2 of ground wire electric leakage.
As shown in Figure 3, this circuit is the circuit theory diagrams possessing complete function of the present invention, wherein, voltage reference circuit comprises a reference source U2, thermistor RT as the main components of overtemperature prote, when attaching plug loose contact produce overtemperature situation time, thermistor RT change in resistance, make triode Q1 conducting, thus trigger controllable silicon SCR conducting, finally complete trip action;
Comprise zero sequence creepage protection function in addition, operation principle is as follows:
When ZCT1 mutual inductor has detected leakage current, VF and the CH1 input of induced voltage difference input amplifying circuit, when leakage current intensity reaches preset value, output T1 pin output constant current electric current is to C4 capacitor charging, when capacitance terminal voltage reaches parameter preset, output control circuit upset is latched, and OUT pin exports high level as the output of amplifying circuit one and amplifying circuit two, trigger controllable silicon SCR conducting through D2, tripping coil L adhesive causes the disconnection of S1-S2 contact to realize power-off protection;
Also comprise the electric protection of ground wire abnormal belt, operation principle is as follows
When ZCT2 mutual inductor has detected leakage current; induced voltage is input amplifying circuit VF and CH2 input respectively; when leakage current intensity reaches preset value; timing T2 pin output constant current electric current is to C5 capacitor charging, and when capacitance terminal voltage reaches parameter preset, output control circuit upset is latched; OUT pin exports high level; trigger controllable silicon SCR conducting through D2, tripping coil L adhesive causes S1, and S2 contact disconnects and realizes power-off protection.
Embodiment two
The present embodiment is substantially identical with the structure of embodiment one, difference is, first amplifying circuit and the second amplifying circuit and voltage reference circuit annexation are independently, schematic diagram as shown in Figure 4, correspondingly, the circuit diagram of the basic structure of amplifying circuit, power supply stabilization circuit and control output circuit as shown in Figure 5, possesses the circuit theory diagrams of complete function as shown in Figure 6.The present embodiment course of work is identical with the course of work of embodiment one, and the effect played is also identical.
To sum up, above-mentioned execution mode is not restricted execution mode of the present invention, and the modification that all those skilled in the art carry out on the basis of flesh and blood of the present invention or equivalent deformation, all at technology category of the present invention.
The invention provides a kind of circuit structure that there are two independent amplifying circuits outputs and control; its two-way exports independent control and is independent of each other and other control modules of easily extensible; achieve intelligent Detection & Controling purposes, solve the defect of line current type earth leakage protective device Frequent trip when socket effective grounding traditionally.
Claims (5)
1. a dual input earth leakage protective device, comprise power supply stabilization circuit, control output circuit, amplifying circuit, integrator one, integrator two, latch one, latch two and voltage reference circuit, wherein, power supply stabilization circuit is powered for controlling output circuit, amplifying circuit and voltage reference circuit, it is characterized in that: amplifying circuit comprises the first amplifying circuit and the second amplifying circuit that work alone, the first amplifying circuit is connected the output of voltage reference circuit to obtain benchmark comparative voltage with the second amplifying circuit; First amplifying circuit connects integrator one, second amplifying circuit and connects integrator two, and integrator one connects latch one, and integrator two connects latch two, latch one and latch two output connection control output circuit respectively, and controls this control output circuit.
2. dual input earth leakage protective device as claimed in claim 1, it is characterized in that: the first amplifying circuit comprises output T1, output T1 connects timing element one.
3. dual input earth leakage protective device as claimed in claim 1, it is characterized in that: the second amplifying circuit comprises output T2, output T2 connects timing element two.
4. dual input earth leakage protective device as claimed in claim 1, it is characterized in that: also comprise ground wire abnormality detection indicating circuit, ground wire abnormality detection indicating circuit is arranged between zero line side and ground terminal.
5. dual input earth leakage protective device as claimed in claim 1, is characterized in that: also comprise the zero sequence current mutual inductor for detecting zero live wire electric leakage, and for detecting the ground wire instrument transformer of ground wire electric leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006937.9A CN105576603A (en) | 2016-01-05 | 2016-01-05 | Double-input leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006937.9A CN105576603A (en) | 2016-01-05 | 2016-01-05 | Double-input leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105576603A true CN105576603A (en) | 2016-05-11 |
Family
ID=55886444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610006937.9A Pending CN105576603A (en) | 2016-01-05 | 2016-01-05 | Double-input leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105576603A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849005A (en) * | 2017-03-30 | 2017-06-13 | 乐清市诚富电器科技有限公司 | A kind of intelligent leakage protector controls circuit and control method |
| CN107154612A (en) * | 2017-07-18 | 2017-09-12 | 余姚市嘉荣电子电器有限公司 | A kind of dual input circuit for electric leakage protector |
| CN107769158A (en) * | 2017-09-27 | 2018-03-06 | 余姚市嘉荣电子电器有限公司 | A kind of safe leakage protection circuit |
| CN108400571A (en) * | 2018-04-24 | 2018-08-14 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device of leakage-current alarm |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2186966Y (en) * | 1993-11-30 | 1995-01-04 | 李增华 | Digital pulse electric shock and leakage protector |
| CN2847635Y (en) * | 2005-12-03 | 2006-12-13 | 温州正普电器有限公司 | Leakage protector |
| RU2441305C1 (en) * | 2010-08-10 | 2012-01-27 | Владимир Иванович Винокуров | Combined protective cutout device |
| CN102810842A (en) * | 2012-09-04 | 2012-12-05 | 季建丰 | Manufacturing method of electric leakage protection switching circuit |
| CN103346532A (en) * | 2013-07-11 | 2013-10-09 | 余姚市嘉荣电子电器有限公司 | Electric leakage prevention plug circuit |
| CN104538925A (en) * | 2014-12-23 | 2015-04-22 | 余姚市嘉荣电子电器有限公司 | Earth leakage protection plug with earth wire high voltage detection function |
| CN204441634U (en) * | 2015-01-29 | 2015-07-01 | 余姚市嘉荣电子电器有限公司 | There is the leakage protecting plug of the abnormal deixis of current supply circuit |
| CN205565682U (en) * | 2016-01-05 | 2016-09-07 | 余姚市嘉荣电子电器有限公司 | Dual input earth -leakage protector |
-
2016
- 2016-01-05 CN CN201610006937.9A patent/CN105576603A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2186966Y (en) * | 1993-11-30 | 1995-01-04 | 李增华 | Digital pulse electric shock and leakage protector |
| CN2847635Y (en) * | 2005-12-03 | 2006-12-13 | 温州正普电器有限公司 | Leakage protector |
| RU2441305C1 (en) * | 2010-08-10 | 2012-01-27 | Владимир Иванович Винокуров | Combined protective cutout device |
| CN102810842A (en) * | 2012-09-04 | 2012-12-05 | 季建丰 | Manufacturing method of electric leakage protection switching circuit |
| CN103346532A (en) * | 2013-07-11 | 2013-10-09 | 余姚市嘉荣电子电器有限公司 | Electric leakage prevention plug circuit |
| CN104538925A (en) * | 2014-12-23 | 2015-04-22 | 余姚市嘉荣电子电器有限公司 | Earth leakage protection plug with earth wire high voltage detection function |
| CN204441634U (en) * | 2015-01-29 | 2015-07-01 | 余姚市嘉荣电子电器有限公司 | There is the leakage protecting plug of the abnormal deixis of current supply circuit |
| CN205565682U (en) * | 2016-01-05 | 2016-09-07 | 余姚市嘉荣电子电器有限公司 | Dual input earth -leakage protector |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106849005A (en) * | 2017-03-30 | 2017-06-13 | 乐清市诚富电器科技有限公司 | A kind of intelligent leakage protector controls circuit and control method |
| CN106849005B (en) * | 2017-03-30 | 2018-11-06 | 乐清市诚富电器科技有限公司 | A kind of intelligent leakage protector control circuit and control method |
| CN107154612A (en) * | 2017-07-18 | 2017-09-12 | 余姚市嘉荣电子电器有限公司 | A kind of dual input circuit for electric leakage protector |
| WO2019015197A1 (en) * | 2017-07-18 | 2019-01-24 | 余姚市嘉荣电子电器有限公司 | Dual-input leakage protector circuit |
| CN107769158A (en) * | 2017-09-27 | 2018-03-06 | 余姚市嘉荣电子电器有限公司 | A kind of safe leakage protection circuit |
| CN108400571A (en) * | 2018-04-24 | 2018-08-14 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device of leakage-current alarm |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160511 |