CN201181835Y - Multifunctional earth-leakage protective equipment - Google Patents
Multifunctional earth-leakage protective equipment Download PDFInfo
- Publication number
- CN201181835Y CN201181835Y CNU2008200381520U CN200820038152U CN201181835Y CN 201181835 Y CN201181835 Y CN 201181835Y CN U2008200381520 U CNU2008200381520 U CN U2008200381520U CN 200820038152 U CN200820038152 U CN 200820038152U CN 201181835 Y CN201181835 Y CN 201181835Y
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- Prior art keywords
- circuit
- testing circuit
- release
- electric capacity
- mutual inductor
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- 230000001681 protective effect Effects 0.000 title claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 239000010703 silicon Substances 0.000 claims abstract description 15
- 229910052754 neon Inorganic materials 0.000 claims description 11
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 11
- 230000002159 abnormal effect Effects 0.000 abstract 2
- 206010014357 Electric shock Diseases 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 16
- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to an multi-function leakage protection device, and belongs to the technical filed of the low-voltage power-distribution protection device, which comprises a zero-sequence current mutual inductor CT1, a zero-sequence current mutual inductor CT2, an IC detection circuit, a controllable silicon SCR, a power-supply circuit, a test circuit, a temperature protection circuit, a grounding abnormal indication circuit and a release. The device has the advantages that the device can prevent the electric-shock accident, and can have the indication function when the grounding is abnormal.
Description
Technical field
The utility model relates to a kind of earth leakage protective device, and particularly a kind of multifunctional electric leakage protective device with the unusual indication of ground connection belongs to low-voltage distribution protective device technical field.
Background technology
At present, the electrical equipment that China family uses is because electrical network situation complexity, the potential safety hazard that exists is more,, imperfect earth incorrect as the appliance socket wiring, disorderly drag disorderly draw, the low of inferior quality power failure of line quality and cause electric appliance casing charged, or ground wire is unusual when charged, and the user does not cause electric shock accidents because of there being tangible prompting.And because minority socket with low quality, and then cause and burn out leakage protecting plug, cause losing due protective effect.
Summary of the invention
The purpose of this utility model provides a kind of multifunctional electric leakage protective device that prevents electric shock accidents and indication can be arranged when ground connection is unusual.
The purpose of this utility model reaches like this, a kind of multifunctional electric leakage protective device, it comprises zero sequence current mutual inductor CT1, CT2, the IC testing circuit, controllable silicon SCR, power circuit, hookup, temperature protection circuit, unusual indicating circuit of ground connection and release, K switch connects the phase line 2 in the power supply in the release, zero line 3 passes zero sequence current mutual inductor CT1, the ground wire 1 that K switch connects in the power line in the release passes zero sequence current mutual inductor CT2, is connected to the input A of IC testing circuit after the secondary coil same-phase series connection of the secondary coil of zero sequence current mutual inductor CT1 and zero sequence current mutual inductor CT2, B; One of the electromagnet coil L1 of release is connected to phase line 2, and the other end is connected with controllable silicon SCR; Power circuit is connected with the power end D of controllable silicon SCR, release, temperature protection circuit and IC testing circuit; Hookup is connected between phase line 2 of not passing zero sequence current mutual inductor CT1 and the zero line 3 that passes zero sequence current mutual inductor CT1; The output E of IC testing circuit is connected with controllable silicon SCR; Temperature protection circuit is connected with the input C of IC testing circuit; The unusual indicating circuit of ground connection is connected that K switch connects between the inlet wire side and outlet side of the ground wire 1 in the power supply in the release.
The IC testing circuit is by integrated circuit (IC), capacitor C 2, C4, C5, C6, resistance R 3 is formed, 1 pin of integrated circuit (IC) is connected with the input A of IC testing circuit with an end of capacitor C 6, one end of the other end of capacitor C 6 and resistance R 3 is connected with the input B of IC testing circuit, one end of the other end of resistance R 3 and capacitor C 5 is connected with 2 pin of integrated circuit (IC), 4 of integrated circuit (IC), 5 pin are connected with an end of capacitor C 4 and the input C of IC testing circuit, 6 pin of integrated circuit (IC) are connected with an end of capacitor C 2,7 pin of integrated circuit (IC) are connected with the output E of IC testing circuit with the other end of capacitor C 2,8 pin of integrated circuit (IC) are connected the other end of capacitor C 4 with the power end D of IC testing circuit, 3 pin of the other end of capacitor C 5 and integrated circuit (IC) are connected with zero line 3.
Temperature protection circuit is made up of temperature detect switch (TDS) TK and resistance R 6; the end of temperature detect switch (TDS) TK is connected with the power end D of power circuit and IC testing circuit; the other end of temperature detect switch (TDS) TK is connected with an end of resistance R 6, and the other end of resistance R 6 is connected with the input C of IC testing circuit.
The unusual indicating circuit of ground connection is made up of capacitor C 8 and neon bulb XD, and an end of capacitor C 8 is connected with the inlet wire side of K switch ground wire 1 in the release, and the other end is connected with the end of neon bulb XD, and the other end of neon bulb XD is connected with the outlet side of K switch ground wire 1 in the release.
Because when having leakage current to produce in the IC testing circuit, can cut off the electricity supply, when temperature anomaly raise, temperature protection circuit also can be cut off the electricity supply; Unusual when charged when ground connection, the unusual indicating circuit indication of ground connection is charged, can pull up appliance plug, in order to avoid cause danger.The utility model can prevent that electric shock accidents from taking place also indicative function to be arranged when ground connection is unusual.
Description of drawings
Fig. 1 is a block diagram of the present utility model.
Fig. 2 is an electrical schematic diagram of the present utility model.
Embodiment
In earth leakage protective device, release is made up of movement devices such as electromagnet and snap close and the K switch with three groups of contacts.Phase in the power line, zero, ground wire power to the load through after the K switch.
In the power circuit, phase line 2, zero line 3 are through diode D1 halfwave rectifier, and resistance R 1 step-down is supplied with DC power supply after capacitor C 3 filtering.
In the release, the end of electromagnet coil L1 is connected with phase line 2, and the other end is connected with the controllable silicon SCR anode; The controllable silicon SCR negative electrode is connected with zero line 3; The controllable silicon SCR grid is connected with the output E of IC testing circuit.Between the grid of controllable silicon SCR and zero line 3, connect capacitor C 1, do filtering and use.
Hookup is made up of button T and resistance R 5, an end of resistance R 5 with do not pass zero sequence current mutual inductor CT1 phase line 2 and be connected, the other end is connected with the end of button T, the other end of button T is connected with the zero line 3 that passes zero sequence current mutual inductor CT1.When pressing the button T, flow through the leakage current of a simulation among the zero sequence current mutual inductor CT1, its current value is by resistance R 5 decisions, and whether the creepage protection function of testing product is effective.
In the IC testing circuit, integrated circuit (IC) is CS54123, and input circuit A, the B end of integrated circuit (IC) is inserted in the secondary coil same-phase series connection back of the secondary coil of zero sequence current mutual inductor CT1 and zero sequence current mutual inductor CT2.C2 is a resonant capacitance, to improve the amplitude of input signal.The two ends of the secondary coil of zero sequence current mutual inductor CT1, CT2 are connecting resistance R2, R7 respectively, and resistance R 2, R7 can adjust residual operating current.C4, C5, C6 are filter capacitor, play anti-interference effect.Power supply phase line 2, zero line 3 pass zero sequence current mutual inductor CT1, and power ground 1 passes zero sequence current mutual inductor CT2.After the signal same-phase that zero sequence current mutual inductor CT1 and CT2 pick up is superimposed to A, B end, handle by the IC testing circuit, when in appointing single line, leakage current generating (except the loop current that phase line 2 and zero line are 3) being arranged and reaching the setting value of circuit setting, integrated circuit (IC) drives the controllable silicon SCR conducting, make the release action, at 0.1 second internal cutting off power supply, can prevent that electric shock accidents from taking place.
In the temperature protection circuit, the end of temperature switch TK be connected with end resistance R 6, the other end is connected with the power end D of IC testing circuit, and the other end of resistance is connected with the input C of IC testing circuit.When temperature took place by unusual the rising, temperature switch TK conducting made 5 pin voltages of integrated circuit (IC) be uprised by low, and integrated circuit (IC) drives the controllable silicon SCR conducting, makes the release action, thereby cuts off the electricity supply, and plays the effect of temperature protection.
K switch connects between the inlet wire side of the ground wire 1 in the power supply and outlet side and is provided with the unusual indicating circuit of ground connection in release, be composed in series by capacitor C 8 and neon bulb XD, one end of capacitor C 8 is connected with the inlet wire side of ground wire 1 in the K switch, the other end is connected with the end of neon bulb XD, and the outlet side of the ground wire 1 in the other end of neon bulb XD and the K switch is connected.Under normal circumstances, because ground wire 1 is not charged, even the K switch of release disconnects in the earth leakage protective device, neon bulb XD no current and not working.Unusual when charged when ground connection, K switch disconnects, and the unusual indicating circuit of ground connection inserts, K switch ground wire 1 inlet wire side is charged, and ground wire 1 is to be connected on the electric appliance casing, constitutes certain impedance path by electrical equipment and ground, neon bulb XD is lighted, and the prompting user pulls up appliance plug, in order to avoid cause danger.
Claims (4)
1, a kind of multifunctional electric leakage protective device, it is characterized in that it comprises zero sequence current mutual inductor (CT1, CT2), the IC testing circuit, controllable silicon (SCR), power circuit, hookup, temperature protection circuit, unusual indicating circuit of ground connection and release, switch in the release (K) connects the phase line (2) in the power supply, zero line (3) passes zero sequence current mutual inductor (CT1), the ground wire (1) that switch in the release (K) is connect in the power line passes zero sequence current mutual inductor (CT2), is connected to the input A of IC testing circuit after the secondary coil same-phase series connection of the secondary coil of zero sequence current mutual inductor (CT1) and zero sequence current mutual inductor (CT2), B; One of the electromagnet coil of release (L1) is connected to phase line (2), and the other end is connected with controllable silicon (SCR); Power circuit is connected with the power end D of controllable silicon (SCR), release, temperature protection circuit and IC testing circuit; Hookup is connected between phase line (2) of not passing zero sequence current mutual inductor (CT1) and the zero line (3) that passes zero sequence current mutual inductor (CT1); The output E of IC testing circuit is connected with controllable silicon (SCR); Temperature protection circuit is connected with the input C of IC testing circuit; The unusual indicating circuit of ground connection is connected switch in the release (K) and connects between the inlet wire side and outlet side of the ground wire (1) in the power supply.
2; multifunctional electric leakage protective device according to claim 1; it is characterized in that the IC testing circuit is by integrated circuit (IC); electric capacity (C2; C4; C5; C6); resistance (R3) is formed; one end of 1 pin of integrated circuit (IC) and electric capacity (C6) is connected with the input A of IC testing circuit; one end of the other end of electric capacity (C6) and resistance (R3) and the input B of IC testing circuit are connected; one end of the other end of resistance (R3) and electric capacity (C5) is connected with 2 pin of integrated circuit (IC); 4 of integrated circuit (IC); 5 pin are connected with an end of electric capacity (C4) and the input C of IC testing circuit; 6 pin of integrated circuit (IC) are connected with an end of electric capacity (C2); 7 pin of integrated circuit (IC) are connected with the output E of IC testing circuit with the other end of electric capacity (C2); 8 pin of integrated circuit (IC) are connected with the power end D of IC testing circuit, the other end of electric capacity (C4); 3 pin of the other end of electric capacity (C5) and integrated circuit (IC) are connected with zero line (3).
3, multifunctional electric leakage protective device according to claim 1; it is characterized in that temperature protection circuit is made up of temperature detect switch (TDS) (TK) and resistance (R6); one end of temperature detect switch (TDS) (TK) is connected with the power end D of power circuit and IC testing circuit; the other end of temperature detect switch (TDS) (TK) is connected with an end of resistance (R6), and the other end of resistance (R6) is connected with the input C of IC testing circuit.
4, multifunctional electric leakage protective device according to claim 1; it is characterized in that the unusual indicating circuit of ground connection is made up of electric capacity (C8) and neon bulb (XD); one end of electric capacity (C8) is connected with the inlet wire side of switch (K) ground wire (1) in the release; the other end is connected with an end of neon bulb (XD), and the other end of neon bulb (XD) is connected with the outlet side of switch (K) ground wire (1) in the release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200381520U CN201181835Y (en) | 2008-06-13 | 2008-06-13 | Multifunctional earth-leakage protective equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200381520U CN201181835Y (en) | 2008-06-13 | 2008-06-13 | Multifunctional earth-leakage protective equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181835Y true CN201181835Y (en) | 2009-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200381520U Expired - Fee Related CN201181835Y (en) | 2008-06-13 | 2008-06-13 | Multifunctional earth-leakage protective equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201181835Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907672A (en) * | 2010-06-30 | 2010-12-08 | 常熟市立得电器有限公司 | Earth wire electrification detection device for earth leakage protective device of electric water heater |
| CN102130439A (en) * | 2011-03-16 | 2011-07-20 | 天津市鸿远电气设备有限公司 | Leakage protection switch with virtual connection preventing function |
| CN102361317A (en) * | 2011-08-17 | 2012-02-22 | 佛山市中格威电子有限公司 | Leakage protection test circuit |
| CN102684148A (en) * | 2012-05-30 | 2012-09-19 | 常熟市立得电器有限公司 | Leakage protection device with extended function |
| CN103036198A (en) * | 2012-12-03 | 2013-04-10 | 佛山市顺德区澳骏电子科技有限公司 | Multi-functional safe electricity leakage protection device capable of preventing false wiring of power socket |
| CN103178492A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protector with electrified earth line protection function |
-
2008
- 2008-06-13 CN CNU2008200381520U patent/CN201181835Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907672A (en) * | 2010-06-30 | 2010-12-08 | 常熟市立得电器有限公司 | Earth wire electrification detection device for earth leakage protective device of electric water heater |
| CN102130439A (en) * | 2011-03-16 | 2011-07-20 | 天津市鸿远电气设备有限公司 | Leakage protection switch with virtual connection preventing function |
| CN102361317A (en) * | 2011-08-17 | 2012-02-22 | 佛山市中格威电子有限公司 | Leakage protection test circuit |
| CN102684148A (en) * | 2012-05-30 | 2012-09-19 | 常熟市立得电器有限公司 | Leakage protection device with extended function |
| CN102684148B (en) * | 2012-05-30 | 2014-06-04 | 常熟市立得电器有限公司 | Leakage protection device with extended function |
| CN103036198A (en) * | 2012-12-03 | 2013-04-10 | 佛山市顺德区澳骏电子科技有限公司 | Multi-functional safe electricity leakage protection device capable of preventing false wiring of power socket |
| CN103036198B (en) * | 2012-12-03 | 2016-06-22 | 佛山市顺德区澳骏电子科技有限公司 | Multi-functional anti-supply socket false wiring safe electricity leakage protection device |
| CN103178492A (en) * | 2013-03-28 | 2013-06-26 | 余姚市嘉荣电子电器有限公司 | Leakage protector with electrified earth line protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20100613 |