CN203800564U - Multi-stage leakage protector - Google Patents
Multi-stage leakage protector Download PDFInfo
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- CN203800564U CN203800564U CN201420219716.6U CN201420219716U CN203800564U CN 203800564 U CN203800564 U CN 203800564U CN 201420219716 U CN201420219716 U CN 201420219716U CN 203800564 U CN203800564 U CN 203800564U
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- 230000001012 protector Effects 0.000 title abstract 5
- 230000001681 protective effect Effects 0.000 claims description 30
- 238000007599 discharging Methods 0.000 claims description 26
- 238000001514 detection method Methods 0.000 abstract description 15
- 238000000034 method Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a multistage leakage protector. A mutual inductor is a zero sequence mutual inductor, and two coils are wound on an internal magnet ring of the mutual inductor, correspondingly lead a heavy current electric leakage signal output terminal and a low current electric leakage signal output terminal out. An electric leakage signal detection circuit comprises a heavy current electric leakage signal detection circuit electrically connected with the heavy current electric leakage signal output terminal and a low current electric leakage signal detection circuit electrically connected with the low current electric leakage signal output terminal. The heavy current electric leakage signal detection circuit and the low current electric leakage signal detection circuit are both electrically connected with a main control chip. According to the multi-stage leakage protector provided by the utility model, through the two coils wound on the zero sequence mutual inductor, the heavy current electric leakage signal detection circuit and the low current electric leakage signal detection circuit, heavy current electric leakage signals and low current electric leakage signals can be detected, a detection current range of the leakage protector is effectively enlarged, and usage scope of the leakage protector is broadened.
Description
Technical field
The utility model relates to a kind of earth leakage protective device, relates in particular a kind of multistage earth leakage protective device.
Background technology
In family's electric terminal, all can be provided with at present an earth leakage protective device, if there is the situation of electric leakage in the process of household electricity, earth leakage protective device will move disconnection home circuit, to prevent electric shock accidents.
At present now earth leakage protective device roughly all comprises instrument transformer, release, main control chip and leakaging signal detecting circuit, leakaging signal detecting circuit, release and instrument transformer are all electrically connected to main control chip, leakaging signal detecting circuit is electrically connected to instrument transformer, instrument transformer is set on test line, for responding to two lines of start to exchange fire line and zero line, whether there is electric leakage situation, when there is electric leakage, instrument transformer will induce electric current and flow to leakaging signal detecting circuit, leakaging signal detecting circuit will flow to main control chip, main control chip just threads off release by controlling drive circuit, existing earth leakage protective device in the market, because its leakaging signal detecting circuit inside is only provided with a road leakaging signal detecting circuit, so the current range that its leakage current protection can be protected is little, detect electric current span little, so just reduced the scope of application of earth leakage protective device.
Utility model content
The deficiency existing for prior art, the purpose of this utility model is to provide the multistage earth leakage protective device that a kind of current range that can protect is large, detection electric current span is large, the scope of application is wide.
For achieving the above object, the utility model provides following technical scheme: a kind of multistage earth leakage protective device, comprise instrument transformer, release, main control chip, drive circuit and leakaging signal detecting circuit, described leakaging signal detecting circuit and drive circuit are all electrically connected to main control chip, described leakaging signal detecting circuit is electrically connected to instrument transformer, described drive circuit is electrically connected to release, described instrument transformer is zero-sequence transformer, and be wound with two-way coil on its inner magnet ring, and corresponding large electric current electric leakage signal output and the little electric current electric leakage signal output of drawing, described leakaging signal detecting circuit comprises large electric current leakaging signal detecting circuit and the little electric current leakaging signal detecting circuit for being electrically connected to little electric current electric leakage signal output for being electrically connected to large electric current electric leakage signal output, described large leakaging signal detecting circuit and little leakaging signal detecting circuit are all electrically connected to main control chip.
By adopting technique scheme, because the coil turn of heavy current circuit and instrument transformer that little current circuit is used is different, so in the zero-sequence transformer here around two-way coil, so just can effectively the electric leakage signal of the electric leakage signal of heavy current circuit and little current circuit be separated and give corresponding leakaging signal detecting circuit, then leakaging signal detecting circuit is delivered to main control chip after electric leakage signal being processed again, reach the object to large electric current electric leakage signal and the detection of little electric current electric leakage signal simultaneously, flow to again afterwards main control chip, main control chip just can be controlled drive circuit, release is threaded off, by above setting, just can effectively reach the object that simultaneously detects large electric current electric leakage signal and little electric current electric leakage signal, increased the electric current span that earth leakage protective can detect, increased the scope of application of earth leakage protective device.
The utility model is further set to: described large electric current leakaging signal detecting circuit and little electric current leakaging signal detecting circuit include rectification circuit and amplifying circuit, described rectification circuit is electrically connected to corresponding instrument transformer output, described rectification circuit is electrically connected to amplifying circuit, and described amplifying circuit is electrically connected to main control chip.
Amplifying circuit in described little electric current leakaging signal detecting circuit is provided with a plurality of, and between parallel with one another.
Described rectification circuit comprises two diodes, two integrated transporting discharging chips and several resistance, after described two diode series aiding connections, form T-shaped circuit with the output of an integrated transporting discharging chip, and this integrated transporting discharging chip negative pole end is electrically connected to instrument transformer output, after a resistance in parallel, be electrically connected to the negative pole end of another integrated transporting discharging chip afterwards, and the output of this integrated transporting discharging chip is electrically connected to amplifying circuit.
Described amplifying circuit comprises integrated transporting discharging chip, adjustable resistance and several resistance, after a resistance of negative pole end series connection of described integrated transporting discharging chip, be electrically connected to rectification circuit, its positive terminal ground connection, and be connected to output after the adjustable resistance of also connecting, output is electrically connected to main control chip.
Described drive circuit comprises dropout drive circuit, indicating circuit and warning drive circuit, described No. three drive circuits include relay, resistance, diode and triode, the base stage of described triode is electrically connected to amplifying circuit, succeeds electrical equipment, grounded emitter after collector electrode series diode.
By adopting technique scheme, by the setting of rectification circuit, just can carry out a rectified action to being input to the electric leakage signal of testing circuit inside, get rid of the interference signal above it, by amplifying circuit, this electric leakage signal is amplified again afterwards, simultaneously can be according to the difference of multiplication factor, electric current in a plurality of number ranges is detected, thereby reach earth leakage protective object, the amplifying circuit of little electric current electric leakage signal is provided with a plurality of simultaneously, and each amplifying circuit multiplication factor is different, so just can effectively reach the effect that the little electric current in a plurality of number ranges is detected.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the testing circuit of multistage earth leakage protective device of the present utility model;
Fig. 2 is the circuit diagram of the drive circuit of multistage earth leakage protective device of the present utility model;
Fig. 3 is the enlarged drawing of amplifying circuit in Fig. 1;
Fig. 4 is the enlarged drawing of rectification circuit in Fig. 1.
In figure: 1, leakaging signal detecting circuit; 11, rectification circuit; 12, amplifying circuit; 2, drive circuit; 21, dropout drive circuit; 22, indicating circuit; 23, warning drive circuit; 3, zero-sequence transformer; R, resistance; U, integrated transporting discharging chip; D, diode; RV, adjustable resistance; Q, triode.
Embodiment
Shown in Fig. 1, a kind of multistage earth leakage protective device of the present embodiment, comprise instrument transformer, release, main control chip, drive circuit 2 and leakaging signal detecting circuit 1, described leakaging signal detecting circuit 1 and drive circuit 2 are all electrically connected to main control chip, described leakaging signal detecting circuit 1 is electrically connected to instrument transformer, described drive circuit 2 is electrically connected to release, described instrument transformer is zero-sequence transformer 3, and be wound with two-way coil on its inner magnet ring, and corresponding large electric current electric leakage signal output and the little electric current electric leakage signal output of drawing, described leakaging signal detecting circuit 1 comprises large electric current leakaging signal detecting circuit 1 and the little electric current leakaging signal detecting circuit 1 for being electrically connected to little electric current electric leakage signal output for being electrically connected to large electric current electric leakage signal output, described large leakaging signal detecting circuit 1 and little leakaging signal detecting circuit 1 are all electrically connected to main control chip.
By adopting technique scheme, because the coil turn of heavy current circuit and instrument transformer that little current circuit is used is different, so in the zero-sequence transformer 3 here around two-way coil, so just can effectively the electric leakage signal of the electric leakage signal of heavy current circuit and little current circuit be separated and give corresponding leakaging signal detecting circuit 1, then leakaging signal detecting circuit 1 is delivered to main control chip after electric leakage signal being processed again, reach the object to large electric current electric leakage signal and the detection of little electric current electric leakage signal simultaneously, flow to again afterwards main control chip, main control chip just can be controlled drive circuit 2, release is threaded off, by above setting, just can effectively reach the object that simultaneously detects large electric current electric leakage signal and little electric current electric leakage signal, increased the electric current span that earth leakage protective can detect, increased the scope of application of earth leakage protective device.
Described large electric current leakaging signal detecting circuit 1 and little electric current leakaging signal detecting circuit 1 include rectification circuit 11 and amplifying circuit 12, described rectification circuit 11 is electrically connected to corresponding instrument transformer output, described rectification circuit 11 is electrically connected to amplifying circuit 12, and described amplifying circuit 12 is electrically connected to main control chip.
By the setting of rectification circuit 11; just can carry out a rectified action to being input to the electric leakage signal of testing circuit inside; get rid of the interference signal above it; by amplifying circuit 12, this electric leakage signal is amplified again afterwards; simultaneously can be according to the difference of multiplication factor; electric current in a plurality of number ranges is detected, thereby reach earth leakage protective object.
Amplifying circuit 12 in described little electric current leakaging signal detecting circuit 1 is provided with a plurality of, and between parallel with one another.
By adopting technique scheme, because the amplifying circuit 12 of little electric current electric leakage signal is provided with a plurality of, and each amplifying circuit 12 multiplication factor is different, so just can effectively reach the effect that the little electric current in a plurality of number ranges is detected, wherein the amplifying circuit 12 of large electric current electric leakage signal is provided with a road, for detection of 10A and 30A current circuit, the amplifying circuit 12 of little electric current electric leakage signal is provided with 7 tunnels, detect respectively 30mA, 50mA, 100mA, 300mA, 500mA, 1A, 3A, the current circuit of 5A, so just can effectively reach the effect that a plurality of current values circuits is detected to protection.
Described rectification circuit 11 comprises two diode D, two integrated transporting discharging chip U and several resistance R, after described two diode D series aiding connections, form T-shaped circuit with the output of an integrated transporting discharging chip U, and this integrated transporting discharging chip U negative pole end is electrically connected to instrument transformer output, after a resistance R in parallel, be electrically connected to the negative pole end of another integrated transporting discharging chip U afterwards, and the output of this integrated transporting discharging chip U is electrically connected to amplifying circuit 12.
By adopting technique scheme, two diode D series aiding connections just can reach a good rectified action, simultaneously because diode D itself has conduction voltage drop, so set up an integrated transporting discharging chip U here, just can effectively to the electric current entering in diode D, carry out a first amplification, avoid occurring that conduction voltage drop that voltage does not reach diode D makes the problem that diode D cannot conducting, after diode D, meet again an integrated transporting discharging chip U, the output signal of rectification circuit 11 is carried out to the effect that a secondary amplifies simultaneously.
Described amplifying circuit 12 comprises integrated transporting discharging chip U, adjustable resistance RVR and several resistance R, after a resistance R of negative pole end series connection of described integrated transporting discharging chip U, be electrically connected to rectification circuit 11, its positive terminal ground connection, and after the adjustable resistance RVR that also connects, be connected to output, output is electrically connected to main control chip.
By adopting technique scheme, integrated transporting discharging chip U, adjustable resistance RVR and resistance R just can form amplifying circuit 12 like this, multiplication factor changes along with the change in resistance of adjustable resistance RVR simultaneously, wherein, one of the inside amplifying circuit 12 of little electric current electric leakage signal adopts secondary to amplify, for detection of current values, it is 30mA circuit, because an integrated transporting discharging chip U can not once carry out larger amplification, so corresponding 30mA circuit amplifying circuit 12 adopts second amplifying circuit 12 here, so that can better amplify electric leakage signal.
Described drive circuit 2 comprises dropout drive circuit 21, indicating circuit 22 and warning drive circuit 23, described No. three drive circuits 2 include relay, resistance R, diode D and triode Q, the base stage of described triode Q is electrically connected to amplifying circuit 12, after collector electrode series diode D, succeed electrical equipment, grounded emitter.
By adopting technique scheme; pin contact pin is all drawn in the output of corresponding relay; so that user selects to adopt which type of type of alarm and dropout mode according to the needs of oneself; further increased the scope of application of earth leakage protective device; by above setting; just triode Q can be formed to switching circuit, and this switching circuit control relay action, so just can effectively reach the object of carrying out control relay by main control chip.
Components and parts model and numerical values recited details thereof that the present embodiment adopts please refer to Figure of description.
The utlity model has following advantage: by being wound with two-way coil in zero-sequence transformer 3, and large electric current leakaging signal detecting circuit 1 and little electric current leakaging signal detecting circuit 1, just can detect large electric current electric leakage signal and little electric current electric leakage signal, effectively increase the detection current range of earth leakage protective device, increased the scope of application of earth leakage protective device, because the coil turn of heavy current circuit and instrument transformer that little current circuit is used is different, so in the zero-sequence transformer 3 here around two-way coil, so just can effectively the electric leakage signal of the electric leakage signal of heavy current circuit and little current circuit be separated and give corresponding leakaging signal detecting circuit 1, then leakaging signal detecting circuit 1 is delivered to main control chip after electric leakage signal being processed again, reach the object to large electric current electric leakage signal and the detection of little electric current electric leakage signal simultaneously, flow to again afterwards main control chip, main control chip just can be controlled drive circuit 2, release is threaded off, by above setting, just can effectively reach the object that simultaneously detects large electric current electric leakage signal and little electric current electric leakage signal, increased the electric current span that earth leakage protective can detect, increased the scope of application of earth leakage protective device.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (6)
1. a multistage earth leakage protective device, comprise instrument transformer, release, main control chip, drive circuit and leakaging signal detecting circuit, described leakaging signal detecting circuit and drive circuit are all electrically connected to main control chip, described leakaging signal detecting circuit is electrically connected to instrument transformer, described drive circuit is electrically connected to release, it is characterized in that: described instrument transformer is zero-sequence transformer, and be wound with two-way coil on its inner magnet ring, and corresponding large electric current electric leakage signal output and the little electric current electric leakage signal output of drawing, described leakaging signal detecting circuit comprises large electric current leakaging signal detecting circuit and the little electric current leakaging signal detecting circuit for being electrically connected to little electric current electric leakage signal output for being electrically connected to large electric current electric leakage signal output, described large leakaging signal detecting circuit and little leakaging signal detecting circuit are all electrically connected to main control chip.
2. multistage earth leakage protective device according to claim 1; it is characterized in that: described large electric current leakaging signal detecting circuit and little electric current leakaging signal detecting circuit include rectification circuit and amplifying circuit; described rectification circuit is electrically connected to corresponding instrument transformer output; described rectification circuit is electrically connected to amplifying circuit, and described amplifying circuit is electrically connected to main control chip.
3. multistage earth leakage protective device according to claim 2, is characterized in that: the amplifying circuit in described little electric current leakaging signal detecting circuit is provided with a plurality of, and between parallel with one another.
4. according to the multistage earth leakage protective device described in claim 2 or 3; it is characterized in that: described rectification circuit comprises two diodes, two integrated transporting discharging chips and several resistance; after described two diode series aiding connections, form T-shaped circuit with the output of an integrated transporting discharging chip; and this integrated transporting discharging chip negative pole end is electrically connected to instrument transformer output; after a resistance in parallel, be electrically connected to the negative pole end of another integrated transporting discharging chip afterwards, and the output of this integrated transporting discharging chip is electrically connected to amplifying circuit.
5. multistage earth leakage protective device according to claim 4; it is characterized in that: described amplifying circuit comprises integrated transporting discharging chip, adjustable resistance and several resistance; after a resistance of negative pole end series connection of described integrated transporting discharging chip, be electrically connected to rectification circuit; its positive terminal ground connection; and after the adjustable resistance of also connecting, be connected to output, output is electrically connected to main control chip.
6. according to the multistage earth leakage protective device described in claim 1 or 2 or 3; it is characterized in that: described drive circuit comprises dropout drive circuit, indicating circuit and warning drive circuit; described No. three drive circuits include relay, resistance, diode and triode; the base stage of described triode is electrically connected to amplifying circuit; after collector electrode series diode, succeed electrical equipment, grounded emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219716.6U CN203800564U (en) | 2014-04-30 | 2014-04-30 | Multi-stage leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420219716.6U CN203800564U (en) | 2014-04-30 | 2014-04-30 | Multi-stage leakage protector |
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| Publication Number | Publication Date |
|---|---|
| CN203800564U true CN203800564U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420219716.6U Expired - Lifetime CN203800564U (en) | 2014-04-30 | 2014-04-30 | Multi-stage leakage protector |
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| Country | Link |
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| CN (1) | CN203800564U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255780A (en) * | 2017-06-26 | 2017-10-17 | 南京普爱医疗设备股份有限公司 | A kind of detection means for carbon nanometer test ray tube strength of discharge |
-
2014
- 2014-04-30 CN CN201420219716.6U patent/CN203800564U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255780A (en) * | 2017-06-26 | 2017-10-17 | 南京普爱医疗设备股份有限公司 | A kind of detection means for carbon nanometer test ray tube strength of discharge |
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