CN201134662Y - Leakage detecting and protecting device - Google Patents
Leakage detecting and protecting device Download PDFInfo
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- CN201134662Y CN201134662Y CNU2007201789015U CN200720178901U CN201134662Y CN 201134662 Y CN201134662 Y CN 201134662Y CN U2007201789015 U CNU2007201789015 U CN U2007201789015U CN 200720178901 U CN200720178901 U CN 200720178901U CN 201134662 Y CN201134662 Y CN 201134662Y
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Abstract
The utility model relates to an electric leakage detection protector, which comprises a voltage detection unit which is connected between a power supply circuit phase line and a zero curve, a current detection unit which is connected on the input end of the power supply circuit in series, an electric leakage detection unit which is connected between a power supply circuit zero curve and a phase line and a micro control unit whose input end is connected with the output ends of the voltage detection unit, the current detection unit and the electric leakage detection unit, the micro control unit controls the disconnection and connection of a main switch unit or an auxiliary switch unit which are connected with the output end of the micro control unit according to detection signals which are received by the input end, and meanwhile, detection results are displayed through a display unit which is connected with the output end of the micro control unit, the main switch unit controls the make and break of the power supply circuit, and the auxiliary switch unit controls the earth leakage detection unit to open and close. The electric leakage detection protector can detect a circuit to conveniently and timely adopt measures before the circuit is closed and in the process of normal operating, and electric safety is protected.
Description
Technical field
The utility model relates to a kind of mains switch, particularly a kind of current leakage detection protection device with detection of electrical leakage.
Background technology
The current leakage detection protection device is to be connected between supply line and the load circuit; be used to detect load circuit and abnormal conditions such as overload, short circuit or electric leakage whether occur; when abnormal conditions appear in load circuit; the switch of cutting off the electricity supply automatically can break; with protection power consumption equipment, the person and property safety, have supply voltage simultaneously and detect defencive function.As the Chinese utility model patent of the patent No. 00239421.9, a kind of electricity consumption warning protection switch that exceeds the quata with load circuit abnormality detection and defencive function is disclosed.But existing current leakage detection protection device; can only when normally moving, power circuit could whether break down by testing circuit; cut off the electricity supply then; the protection Electrical Safety; whether there is fault and can't before combined floodgate, detect supply line; there is safe blind area, may causes power consumption equipment to damage or other security incidents, can't reach the purpose of safeguard protection.
Summary of the invention
At the deficiencies in the prior art, the utility model provides a kind of current leakage detection protection device that can detect before circuit closes a floodgate and in the running and protect with electric line and device security.
The utility model comprises that one is connected in the voltage detection unit between supply line's phase line and the zero line, and whether be used to monitor supply power voltage unusual and export testing result; And one series connection be connected in the current detecting unit of supply line's input, be used to detect whether load circuit transships, short circuit or overcurrent and export testing result; And a detection of electrical leakage unit that is connected between supply line's zero line and the phase line, be used to detect load circuit and whether leak electricity and export testing result; Reach the micro-control unit that an input is connected with the output of above-mentioned voltage detection unit, current detecting unit and detection of electrical leakage unit, the detection signal that this micro-control unit receives according to input, main switch unit that control is connected with its output or auxiliary switching element disconnect or are closed, show testing result by the display unit that is connected with its output simultaneously, the break-make of main switch unit controls supply line, auxiliary switching element control detection of electrical leakage unit is opened or is closed; And one provide the switching power circuit of power supply for said units.
Described micro-control unit is provided with a clock unit.
Described clock unit mainly is made of the DS1302 clock chip.
Described voltage detection unit comprises resistance R 3, the R4 that is connected in series between supply line's phase line and the ground, and the connection mid point of resistance R 3, R4 connects the input of micro-control unit.
Described current detecting unit comprises the operational amplifier U1B that output is connected with the input of micro-control unit, and the input of this operational amplifier U1B is through the zero line of current transformer CT1 connection supply line, another input end grounding.
Described leakage current detect unit comprises the electricity leakage sensor that is connected with the phase line and the zero line of supply line, the electric current algebraical sum that is used for inductive power supply line phase and zero line, described electricity leakage sensor one output head grounding, another output is connected with the input of micro-control unit through operational amplifier U1C.
Described main switch unit comprises triode Q1, relay J 1 and main switch, and relay J 1 is connected with the output of micro-control unit and is subjected to micro-control unit controls and main switch adhesive or disconnection through triode Q1, and relay J 1 is connected with switching power circuit simultaneously.
Described auxiliary switch comprises triode Q2, relay J 2, resistance R 12 and auxiliary switch, after connecting with auxiliary switch, resistance R 12 is connected in parallel with main switch, relay J 2 one ends are connected with the output of micro-control unit and controlled by it through triode Q2, and the other end is connected with switching power circuit.
Described micro-control unit is provided with the communication interface that can be connected with remote display unit.
The utility model by the voltage detection unit sampling, judges through micro-control unit whether voltage occurs unusually before circuit closes a floodgate; Simultaneously; by Q2 control auxiliary switch; give outlet line one safe current; whether leak electricity by detection of electrical leakage unit inductive power supply circuit, if overtension or low excessively, line electrical leakage; the output of micro-control unit is no-output voltage just; the main switch unit is not closed, and supply line's no current passes through, well the equipment and the Electrical Safety of protection.Be in operation, whether the current detecting unit testing circuit short circuit or overload, and when short circuit or overload appearred in circuit, micro-control unit controls main switch unit disconnected, and makes that electricity consumption is safer to examine.The utility model can both detect so that in time take measures circuit before circuit closes a floodgate and in the normal course of operation, guarantees Electrical Safety.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is a circuit diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises that voltage detection unit 1, current detecting unit 2, detection of electrical leakage unit 3, micro-control unit MCU reach the Switching Power Supply 7 that power supply is provided for said units.Whether voltage detection unit 1 is connected in parallel in the load circuit input, be used to monitor supply power voltage and occur unusually; Current detecting unit 2 is connected in series in supply line's input, is used to detect whether load circuit transships, short circuit or overcurrent and testing result passed to micro-control unit MCU; Whether leakage current detect unit 3 is connected in parallel in the power supply circuits input, be used to detect load circuit and leak electricity; The input of micro-control unit MCU is connected with the output of voltage detection unit 1, current detecting unit 2 and detection of electrical leakage unit 3, the detection signal that micro-control unit MCU receives according to input, main switch unit 4 that control is connected with its output or auxiliary switch 5 disconnect or are closed, show testing result by the display unit 6 that is connected with its output simultaneously, display unit 6 is a LCD Panel, fault message can be demonstrated with digital form.
As Fig. 2, voltage detection unit 1 comprises resistance R 3, the R4 that is connected in series between phase line L of supply line and the ground, and the mid point of resistance R 3, R4 meets the input ADC1 of micro-control unit MCU.Current detecting unit 2 comprises the operational amplifier U1B that output is connected with the input ADC2 of micro-control unit MCU, and operational amplifier U1B one input is connected another input end grounding through current transformer CT1 with the zero line N of supply line.Leakage current detect unit 3 comprises the electricity leakage sensor CT2 that is connected in circuit output end, electricity leakage sensor CT2 is used for the electric current algebraical sum of inductive power supply line phase L and zero line N, whether leak electricity to detect load, electricity leakage sensor CT2 one output head grounding, another output meet the input ADC3 of micro-control unit MCU through operational amplifier U1C.
The output PA6 of micro-control unit MCU connects the base stage of triode Q1, and the emitter of triode Q1 is connected with relay J 1, passes through or cut off the power supply to control main switch JD1 disconnection or closed by control relay J1, and relay J 1 other end is connected with Switching Power Supply 7.The output PA7 of micro-control unit MCU is connected with the base stage of triode Q2, the emitter of triode Q2 is connected with relay J 2 and control relay J2 go side electricity disconnects or closure with control auxiliary switch JD2, and relay J 2 and auxiliary switch JD2 constitute auxiliary switching element 5.In parallel with main switch JD1 after resistance R 12 is connected with auxiliary switch JD2, relay J 2 one ends are connected with Switching Power Supply 7.Micro-control unit MCU is provided with the communication interface 8 that can be connected with remote display unit, and remote display unit can will flow to the remote monitoring personnel with the ruuning situation of electric line, to realize remote monitoring, guarantees normally to move with electric line.Micro-control unit also is provided with clock unit 9, clock unit 9 mainly is made of clock chip, for example: and the clock chip of DS1302, can carry out timing to year, month, day, realization has important meaning to the record of fault with the time of breaking down to the cause investigation that breaks down.Function control switch K1, K2, K3 can open or close voltage detection unit, current detecting unit or detection of electrical leakage unit.
When circuit brings into operation, main switch JD1, auxiliary switch JD2 disconnect, if supply power voltage is higher or lower than the specified safety value that micro-control unit MCU sets, then the output PA6 of micro-control unit MCU does not have output voltage, triode Q1 is in cut-off state, and relay J 1 does not have electric current to pass through, main switch JD1, auxiliary switch JD2 still is in off-state, not to electric.If supply power voltage is just often, the output PA7 of micro-control unit MCU has voltage output, triode Q2 conducting, and relay J 2 adhesive auxiliary switch JD2, power supply is communicated with load circuit by resistance R 12, auxiliary switch.If this moment load circuit overload, short circuit or overcurrent, the input current of current detecting unit 2 much larger than or be lower than specified safety value, the loss of voltage of the output PA7 of micro-control unit MCU then, auxiliary switch JD2 replys off-state; Normal as load circuit, then the output PA6 of micro-control unit MCU has voltage output, triode Q1 conducting, and relay J 1 adhesive main switch JD1, circuit enters normal operating condition.During normal operation circuit, voltage detection unit, current detecting unit, detection of electrical leakage unit are in the tracking detected state, in case overload, short circuit, overcurrent or electric leakage situation appear in circuit, the voltage of micro-control unit MCU output PA6 just disappears, triode Q1 ends, main switch JD1 disconnects, and stops electric; The simultaneously time and the fault type of clock unit records abnormal situation, and demonstrate by display unit 6, as required, also can connect remote display, long-range conveying and supervisory circuit faults by communication interface 8.
Claims (9)
1, a kind of current leakage detection protection device is characterized in that: comprise
One is connected in the voltage detection unit between supply line's phase line and the zero line, and whether be used to monitor supply power voltage unusual and export testing result; And
One series connection is connected in the current detecting unit of supply line's input, is used to detect whether load circuit transships, short circuit or overcurrent and export testing result; And
Whether one is connected in the detection of electrical leakage unit between supply line's zero line and the phase line, be used to detect load circuit and leak electricity and export testing result; And
The micro-control unit that one input is connected with the output of above-mentioned voltage detection unit, current detecting unit and detection of electrical leakage unit, the detection signal that this micro-control unit receives according to input, main switch unit that control is connected with its output or auxiliary switching element disconnect or are closed, show testing result by the display unit that is connected with its output simultaneously, the break-make of main switch unit controls supply line, auxiliary switching element control detection of electrical leakage unit is opened or is closed; And
One provides the switching power circuit of power supply for said units.
2, a kind of current leakage detection protection device according to claim 1, it is characterized in that: described micro-control unit is provided with a clock unit.
3, a kind of current leakage detection protection device according to claim 2, it is characterized in that: described clock unit mainly is made of the DS1302 clock chip.
4, a kind of current leakage detection protection device according to claim 1, it is characterized in that: described voltage detection unit comprises resistance R 3, the R4 that is connected in series between supply line's phase line and the ground, and the connection mid point of resistance R 3, R4 connects the input of micro-control unit.
5, a kind of current leakage detection protection device according to claim 1; it is characterized in that: described current detecting unit comprises the operational amplifier U1B that output is connected with the input of micro-control unit; the input of this operational amplifier U1B is through the zero line of current transformer CT1 connection supply line, another input end grounding.
6, a kind of current leakage detection protection device according to claim 1; it is characterized in that: described leakage current detect unit comprises the electricity leakage sensor that is connected with the phase line and the zero line of supply line; the electric current algebraical sum that is used for inductive power supply line phase and zero line; described electricity leakage sensor one output head grounding, another output is connected with the input of micro-control unit through operational amplifier U1C.
7, a kind of current leakage detection protection device according to claim 1; it is characterized in that: described main switch unit comprises triode Q1, relay J 1 and main switch; relay J 1 is connected with the output of micro-control unit and is subjected to micro-control unit controls and main switch adhesive or disconnection through triode Q1, and relay J 1 is connected with switching power circuit simultaneously.
8, a kind of current leakage detection protection device according to claim 7; it is characterized in that: described auxiliary switch comprises triode Q2, relay J 2, resistance R 12 and auxiliary switch; after connecting with auxiliary switch, resistance R 12 is connected in parallel with main switch; relay J 2 one ends are connected with the output of micro-control unit and controlled by it through triode Q2, and the other end is connected with switching power circuit.
9, according to arbitrary described a kind of current leakage detection protection device in the claim 1～8, it is characterized in that: described micro-control unit is provided with the communication interface that can be connected with remote display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201789015U CN201134662Y (en) | 2007-12-27 | 2007-12-27 | Leakage detecting and protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201789015U CN201134662Y (en) | 2007-12-27 | 2007-12-27 | Leakage detecting and protecting device |
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| Publication Number | Publication Date |
|---|---|
| CN201134662Y true CN201134662Y (en) | 2008-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201789015U Expired - Fee Related CN201134662Y (en) | 2007-12-27 | 2007-12-27 | Leakage detecting and protecting device |
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| CN (1) | CN201134662Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950946A (en) * | 2010-09-17 | 2011-01-19 | 徐洪 | Super-prevention intelligent protector |
| CN102104243A (en) * | 2009-12-22 | 2011-06-22 | 松下电工株式会社 | Power feeding control apparatus |
| CN104377640A (en) * | 2014-11-07 | 2015-02-25 | 国网上海市电力公司 | Microcurrent loop inquiry electricity leakage and electric shock preventing system |
| CN104655895A (en) * | 2014-12-01 | 2015-05-27 | 国网上海市电力公司 | Micro-current inquiry power supply energy-saving protection system for watt-hour meter |
| CN107911928A (en) * | 2017-11-14 | 2018-04-13 | 武汉市路灯管理服务中心 | A kind of method of street lamp data acquisition device and breakdown judge |
| WO2019041092A1 (en) * | 2017-08-28 | 2019-03-07 | 深圳市锐明技术股份有限公司 | Automobile power line protection device |
| CN110764018A (en) * | 2019-10-16 | 2020-02-07 | 六安市国能光电照明有限公司 | High-power LED lamp leakage screening instrument |
| CN114421424A (en) * | 2022-01-26 | 2022-04-29 | 石狮一笔成服饰科技有限公司 | Intelligent anti-creeping safety processor |
-
2007
- 2007-12-27 CN CNU2007201789015U patent/CN201134662Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104243A (en) * | 2009-12-22 | 2011-06-22 | 松下电工株式会社 | Power feeding control apparatus |
| CN102104243B (en) * | 2009-12-22 | 2013-12-11 | 松下电器产业株式会社 | Power feeding control apparatus |
| CN101950946A (en) * | 2010-09-17 | 2011-01-19 | 徐洪 | Super-prevention intelligent protector |
| CN104377640A (en) * | 2014-11-07 | 2015-02-25 | 国网上海市电力公司 | Microcurrent loop inquiry electricity leakage and electric shock preventing system |
| CN104655895A (en) * | 2014-12-01 | 2015-05-27 | 国网上海市电力公司 | Micro-current inquiry power supply energy-saving protection system for watt-hour meter |
| WO2019041092A1 (en) * | 2017-08-28 | 2019-03-07 | 深圳市锐明技术股份有限公司 | Automobile power line protection device |
| CN107911928A (en) * | 2017-11-14 | 2018-04-13 | 武汉市路灯管理服务中心 | A kind of method of street lamp data acquisition device and breakdown judge |
| CN110764018A (en) * | 2019-10-16 | 2020-02-07 | 六安市国能光电照明有限公司 | High-power LED lamp leakage screening instrument |
| CN114421424A (en) * | 2022-01-26 | 2022-04-29 | 石狮一笔成服饰科技有限公司 | Intelligent anti-creeping safety processor |
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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: 20081015 Termination date: 20121227 |