CN2746621Y - Intelligent earth leakage protective device - Google Patents
Intelligent earth leakage protective device Download PDFInfo
- Publication number
- CN2746621Y CN2746621Y CN 200420089197 CN200420089197U CN2746621Y CN 2746621 Y CN2746621 Y CN 2746621Y CN 200420089197 CN200420089197 CN 200420089197 CN 200420089197 U CN200420089197 U CN 200420089197U CN 2746621 Y CN2746621 Y CN 2746621Y
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- circuit
- resistance
- earth leakage
- chip microcomputer
- control circuit
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Abstract
The utility model relates to an intelligent earth leakage protective device, belonging to the technical field of the circuit emergency protective device. The technical problem needed to be solved is to provide an earth leakage protective device which can indicate the phase and the number value of the earth leakage automatically, the earth leakage protective device has strong interference immunity and reduces false action effectively. The technical solution of the utility model is that the intelligent earth leakage protective device comprises an air breaker, a power controlling switch, and an electronic control circuit; the output signal end of the electronic control circuit is connected with a direct current motor to control the turn of the direct current motor and realize the automatic controlling switch of the breaker. The electronic control circuit comprises a phase discrimination circuit and a control circuit of single chip computer. The phase discrimination circuit comprises an operational amplifier, a bidirectional limiter diode, a resistor, and a capacitance. The control circuit of single chip computer comprises a single chip computer, a crystal resonator, a three-electrode tube, a voltage stabilizing tube, and a capacitance. The intelligent earth leakage protective device can indicate the phase and the number value of the earth leakage automatically, and can distinguish and judge the current of the electric touch and the earth leakage. The interference immunity is strong, the false action can be reduced effectively, and the throw and transport rate and the stability of the protector are improved.
Description
Technical field
The utility model relates to a kind of detection of electrical leakage equipment, belongs to circuit emergency protective device technical field.
Background technology
Earth leakage protective device is an indispensable device in the low-voltage distribution system, and it can play the effect that prevents shock hazard in distribution line, also is to prevent to leak electricity to cause the technical measures of electrical fire and electric equipment damage accident.Both at home and abroad at present the most of earth leakage protective device that adopts all has to finish simultaneously and detects electric current, leakage current is compared, disconnected during above fiducial value when leakage current three functions such as protected circuit with fiducial value.But in use the user finds, these circuit brakes exist some shortcomings to be improved.When detecting leakage current, can not distinguish electric leakage as a lot of circuit brakes and occur in which phase; this has brought difficulty just for failure judgement and maintenance, and Chinese patent ZL95217004.3 disclosed " phase demodulation amplitude discrimination silent running earth leakage protective device " is one of this class protector.Though the circuit brake that also has improves; can indicate the electric leakage phase place; as Chinese patent ZL99215695.5 disclosed " digital phase-detecting amplitude-detecting leak protector " and ZL01236678.1 disclosed " phase-detecting amplitude-detecting leak protector "; but they exist misoperation frequent, to the problem that this technical problem of stability of the fail safe of electricity consumption and power supply solves badly, improved necessity is still arranged.Current market is very big to the requirement of earth leakage protective device, if the technical staff can develop a kind ofly detect accurately, stability is high, simple in structure, the product of reasonable price, is bound to be subjected to users' welcome.
Summary of the invention
Technical problem to be solved in the utility model is the shortcoming that overcomes the said goods, provide a kind of phase place that can indicate electric leakage automatically and numerical value, strong interference immunity, effectively reduce misoperation, improve the operational percentage of protector and the intelligent electricity leakage protector of stability.
The technical scheme that solves the problems of the technologies described above is:
Intelligent electricity leakage protector, it is made up of outer cover, air circuit, electronic divide-shut brake, closing by hand, electronic control circuit, electronic divide-shut brake, closing by hand are connected with air circuit, and the output signal end of electronic control circuit is connected with the direct current machine of electronic divide-shut brake by direct current relay; Electronic control circuit comprises power circuit, electromagnetic trip circuit, sampling circuit of electric leakage, circuit for controlling motor, display output circuit, and its improvements are also to comprise phase identification of circuit and single chip machine controlling circuit in the electronic control circuit;
Phase identification of circuit is made up of transport and placing device T21, diode D8, D9, resistance R 5, R31, capacitor C 6, the forward end of transport and placing device T21 is by resistance R 31 ground connection, negative end connects the output of power circuit by resistance R 5, output connects the I/O mouth of single-chip microcomputer T31, diode D8, D9 oppositely are attempted by between the forward end and negative end of transport and placing device T21, be the double limiting diode, capacitor C 6 also is attempted by between the forward end and negative end of transport and placing device T21;
Single chip machine controlling circuit is by single-chip microcomputer T31, crystal oscillator XT1, triode T4, voltage-stabiliser tube T10, resistance R 10, R11, R12, capacitor C 15, C16, C17 forms, the vdd terminal mouth of single-chip microcomputer T31 meets power supply VCC, VSS port ground connection, capacitor C 17 is connected across between VSS port and the vdd terminal mouth, the CIKin port of single-chip microcomputer T31 and CIKout port are connected on the two ends of crystal oscillator XT1 respectively, again by capacitor C 15, C16 ground connection, the base stage of triode T4 and emitter meet power supply VCC, voltage-stabiliser tube T10, resistance R 10, R11 is connected on the base stage of T4, it is the voltage stabilizing divider resistance, the collector electrode of T4 connects the I/O mouth of single-chip microcomputer T31, and other I/O mouth of single-chip microcomputer T31 connects the electromagnetic trip circuit respectively, circuit for controlling motor and display circuit.
Above-mentioned intelligent electricity leakage protector; it also has electric shock, leakage current value combinational circuit; form by four bit combination switch JP1～JP4, resistance R 13～R20; the end ground connection of JP1～JP4; the other end connects the corresponding I/O mouth of single-chip microcomputer T31 respectively by bus; power supply VCC is connected with an end of the connecting bus of JP1～JP4, resistance R 17～R20 and be connected on JP1～JP4 respectively and the I/O mouth of single-chip microcomputer T31 between, resistance R 13～R16 is connected on respectively between JP1～JP4 and the power supply VCC.
Above-mentioned intelligent electricity leakage protector; it also has the leak(age) test circuit; form by button AN1～AN4, resistance R 41～R44; meet the electric leakage sample coil DL1 on the toroidal core after the end parallel connection of button AN1～AN4; the other end meets power inleting terminal A, B, C by resistance R 41～R44 respectively; R41 corresponding A phase, the corresponding B phase of R42, the corresponding C of R43, R44 is connected mutually.
Adopt the intelligent electricity leakage protector of this structure; can indicate the phase place and the numerical value of electric leakage automatically; can also to get an electric shock, leakage current is distinguished and judge; therefore strong interference immunity can effectively reduce misoperation, improves the operational percentage and the stability of protector; the refining of this product structure, compactness; reasonable price is convenient to promote, and is desirable earth leakage protective device.
Description of drawings
Fig. 1 is a block diagram of the present utility model;
Fig. 2 is a structural representation of the present utility model;
Fig. 3 is an electronic control circuit schematic diagram of the present utility model.
Number in the figure thes contents are as follows:
Divide-shut brake handle 11 frame 12 connecting axles 13 pull bars 14 electric machine supports 15 pull rod shaft 16 motors 17 motors wheel 18 pcb board supports 19 pcb boards 20 transformers 21 air circuit loam cakes 22 red sub combined floodgate indicating arms 23 blue manual brake separating bar 24 wire holes 25 of cranking arm that are fixedly clamped
Embodiment
Can see that from Fig. 1,2 the utility model is made up of outer cover, air circuit, electronic divide-shut brake, closing by hand and electronic control circuit.Electronic divide-shut brake, closing by hand are connected with air circuit, and the output signal end of electronic control circuit is connected with the direct current machine of electronic divide-shut brake by direct current relay.
Fig. 2 shows, the direct current machine 17 that is fixed on the air circuit is transformed to rectilinear motion by crank arm wheel 18 and pull bar 14 of motor with the circular motion of motor, the rotation of motor 17 drives pull bar 14, connects the breaking and closing that divide-shut brake handle 11 is realized air circuit.Red sub combined floodgate indicating arm 23 indicates its breaking and closing state, and blue manual brake separating bar 24 can be realized manual brake separating.Transformer 21 also is equipped with in air circuit loam cake 22 fronts, for control circuit provides low-tension supply, and little pcb board 20 has been installed, opened wire hole 25 in the air circuit lower right, A, B, C, N three phase mains and electromagnetic trip circuit 2, divide-shut brake position sensitive switch lead have been drawn from wire hole 25.Be outer cover directly over the air circuit loam cake 22, the wiring board of electronic control circuit is equipped with in the outer cover inboard.
Fig. 3 shows that electronic control circuit is made up of power circuit 1, electromagnetic trip circuit 2, sampling circuit of electric leakage 3, circuit for controlling motor 4, single chip machine controlling circuit 5, display output circuit 6, electric shock, leakage current value combinational circuit 7, phase identification of circuit 8, leak(age) test circuit 9.
The electric power incoming line of power circuit 1 is taken from A, the N phase of air circuit, transformer B1 transformation behind switch BW, transformer secondary output meets diode D2, D3, D4, D5 form the two-way power supply, one route D2 output is through C2, C3, C4, C5 filtering, three-terminal regulator block T11 voltage stabilizing, output+5V DC power supply, export through C7, C8, R6 filtering output+12V DC power supply through D5 on another road.
Electromagnetic trip circuit 2 is linked by the mechanical chain mechanism and the electromagnetic trip coil DC of air circuit DL break contact, on electromagnetic trip coil DC and the A that connects the introducing of switch BE lower end after bidirectional triode thyristor SCR connects, N two lines, the control utmost point of controllable silicon SCR connects the I/O mouth of single-chip microcomputer T31 by diode D1, send instruction by single-chip microcomputer, control bidirectional triode thyristor SCR conducting or end is connected or disjunction electromagnetic trip coil DC.
On the toroidal core that the electric leakage sample coil DL2 of sampling circuit of electric leakage 3 and leak(age) test coil DL1 make around permalloy respectively, electric leakage sample coil DL2 is connected in the forward and reverse input of receiving transport and placing device T21 behind capacitor C 1, double limiting diode D6, D7, sample resistance R2, current-limiting resistance R3, the R4, signal is amplified, and amplifying signal is delivered to the I/O mouth of single-chip microcomputer T31 by the output of transport and placing device T21.
Circuit for controlling motor 4 sends instruction by two I/O mouths of single-chip microcomputer T31, the amplifying circuit of forming by triode T1, T2, T3 amplifies, flow to direct current relay ZL coil, the normally opened contact of direct current relay ZL is connected in the current supply circuit of direct current machine, the closure of normally opened contact or the rotation of opening the control direct current machine, realize the automatic divide-shut brake and the reclosing of circuit breaker, emitter at triode T2 also is connected to divide-shut brake location status sensitive switch WK1, its moving point connects the emitter of T2, the normal battle meets power supply VCC, normally closed ground connection.
Single chip machine controlling circuit 5 is made up of single-chip microcomputer T31, crystal oscillator XT1, triode T4, voltage-stabiliser tube T10, resistance R 10, R11, R12, capacitor C 15, C16, C17.It is the single-chip microcomputer of DIP28 that present embodiment adopts model.1 pin of single-chip microcomputer T31 connects the power-off reset circuit of being made up of triode T4, voltage-stabiliser tube D10, resistance R 10, R11, R12, and 2 pin connect the output of sampling circuit of electric leakage 3, and 3 pin connect the output of phase identification of circuit 8.5,6 pin output signal to circuit for controlling motor 4,8 pin and are connected with electromagnetic trip circuit 2, and 9,10 pin meet crystal oscillator XT1, four bit combination switches of 11～14 pin contact electricity, leakage current value combinational circuit 7,19 pin ground connection, 20 pin connect power supply, and 21～28 pin connect display output circuit 6.Single-chip microcomputer T31 to the electric leakage signal, phase signal of input in single-chip microcomputer by program compare, computing, and send instruction according to program, disjunction or closed air circuit are delivered to display with resulting signal simultaneously and are shown.
Display output circuit 6 is made up of three figure place sign indicating number displays, resistance R 21～R27, shows state, leakage current amplitude and the phase place of output residual current circuit breaker.
Electric shock, leakage current value combinational circuit 7 are made up of four bit combination switch JP1～JP4, resistance R 13～R20, four bit combination switches from the logical combination from 0000,0001 ... to 1110,1111, can form 16 kinds of states altogether, these different combinations of states are delivered to single-chip microcomputer T31, form the different shock current values and the combination of leakage current value, be used in different seasons, during different surrounding environment, set the response lag of shock current and leakage current.
Phase identification of circuit 8 receives the single phase half wave rectification signal of being fetched by B1 level of transformer, sending into transport and placing device T21 after capacitor C 6 filtering, diode D8, D9 double limiting current limliting amplifies, signal after the amplification is sent into single-chip microcomputer T31, electric leakage signal is carried out phase place judge.
Leak(age) test circuit 9 is made up of button AN1～AN4, resistance R 41～R44, meet the electric leakage sample coil DL1 on the toroidal core after the end parallel connection of button AN1～AN4, the other end connects on power line A, B, the C three-phase by current-limiting resistance R41～R44 respectively, R41 corresponding A phase, the corresponding B phase of R42, the corresponding C of R43, R44 is connected.In order to test electric leakage phase place with surpass the amplitude of electric leakage or shock current.
It is the sudden change electric leakage that the person gets an electric shock that the utility model can be distinguished by single-chip microcomputer automatically to detected leakage current, the still gradual electric leakage of leakage, and judge which phase electric leakage occurs in, amplitude is much, can show on display.Under three-phase leaked electricity unbalanced situation, each personal relatively electric shock abrupt change high conformity had been eliminated the sudden change electric leakage dead band of getting an electric shock.The user can also get an electric shock by regulating, the leakage current combined value is set the response lag of getting an electric shock and leaking electricity; promptly can start the protector action for very little person electric shock mutation current; and can set rational current response value for gradual leakage current; so both can guarantee the reliability of powering; can guarantee the fail safe of electricity consumption again; reduce the disconnected tripping operation of erroneous judgement number of times effectively, improved protector operational percentage and stability.
For fear of because the mistrip that the false electric shock that causes of a variety of causes, electric leakage cause, the utility model one more reclosing function, after air circuit is received the instruction tripping operation, single-chip microcomputer can order circuit breaker to carry out single shot reclosing in the time of appointment, to get rid of the mistrip that various accidentalia cause,, make and trip again if still have electric shock, electric leakage signal to occur behind the reclosing, just judge it is correct tripping operation, no longer reclosing.This function is sent instruction by single-chip microcomputer, and circuit for controlling motor is carried out.
Claims (3)
1, intelligent electricity leakage protector, it is made up of outer cover, air circuit, electronic divide-shut brake, closing by hand, electronic control circuit, electronic divide-shut brake, closing by hand are connected with air circuit, and the output signal end of electronic control circuit is connected with the direct current machine of electronic divide-shut brake by direct current relay; Electronic control circuit comprises power circuit
The electromagnetic trip circuit
Sampling circuit of electric leakage
Circuit for controlling motor
Display output circuit
It is characterized in that: also have phase identification of circuit in the electronic control circuit
And single chip machine controlling circuit
Phase identification of circuit
Form by transport and placing device T21, diode D8, D9, resistance R 5, R31, capacitor C 6, the forward end of transport and placing device T21 is by resistance R 31 ground connection, negative end connects the output of power circuit by resistance R 5, output connects the I/O mouth of single-chip microcomputer T31, diode D8, D9 oppositely are attempted by between the forward end and negative end of transport and placing device T21, be the double limiting diode, capacitor C 6 also is attempted by between the forward end and negative end of transport and placing device T21;
Single chip machine controlling circuit
By single-chip microcomputer T31, crystal oscillator XT1, triode T4, voltage-stabiliser tube T10, resistance R 10, R11, R12, capacitor C 15, C16, C17 forms, the vdd terminal mouth of single-chip microcomputer T31 meets power supply VCC, VSS port ground connection, capacitor C 17 is connected across between VSS port and the vdd terminal mouth, the CIKin port of single-chip microcomputer T31 and CIKout port are connected on the two ends of crystal oscillator XT1 respectively, again by capacitor C 15, C16 ground connection, the base stage of triode T4 and emitter meet power supply VCC, voltage-stabiliser tube T10, resistance R 10, R11 is connected on the base stage of T4, it is the voltage stabilizing divider resistance, the collector electrode of T4 connects the I/O mouth of single-chip microcomputer T31, and other I/O mouth of single-chip microcomputer T31 connects the electromagnetic trip circuit respectively
Circuit for controlling motor
And display circuit
2, intelligent electricity leakage protector according to claim 1 is characterized in that: it also has electric shock, leakage current value combinational circuit
Electric shock, leakage current value combinational circuit
Form by four bit combination switch JP1～JP4, resistance R 13～R20, the end ground connection of JP1～JP4, the other end connects the corresponding I/O mouth of single-chip microcomputer T31 respectively by bus, power supply VCC is connected with an end of the connecting bus of JP1～JP4, resistance R 17～R20 and be connected on JP1～JP4 respectively and the I/O mouth of single-chip microcomputer T31 between, resistance R 13～R16 is connected on respectively between JP1～JP4 and the power supply VCC.
3, intelligent electricity leakage protector according to claim 2 is characterized in that: it also has the leak(age) test circuit
The leak(age) test circuit
Form by button AN1～AN4, resistance R 41～R44, meet the electric leakage sample coil DL1 on the toroidal core after the end parallel connection of button AN1～AN4, the other end meets power inleting terminal A, B, C by resistance R 41～R44 respectively, R41 corresponding A phase, the corresponding B phase of R42, the corresponding C of R43, R44 is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420089197 CN2746621Y (en) | 2004-09-03 | 2004-09-03 | Intelligent earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420089197 CN2746621Y (en) | 2004-09-03 | 2004-09-03 | Intelligent earth leakage protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2746621Y true CN2746621Y (en) | 2005-12-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420089197 Expired - Fee Related CN2746621Y (en) | 2004-09-03 | 2004-09-03 | Intelligent earth leakage protective device |
Country Status (1)
| Country | Link |
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| CN (1) | CN2746621Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904208A (en) * | 2012-07-27 | 2013-01-30 | 苏州贝腾特电子科技有限公司 | Leakage breaker |
| CN102904202A (en) * | 2012-10-29 | 2013-01-30 | 浙江星明智能电气科技有限公司 | Intelligent re-closing circuit breaker |
| CN102931034A (en) * | 2012-07-27 | 2013-02-13 | 苏州贝腾特电子科技有限公司 | Leakage circuit breaker |
| CN103138226A (en) * | 2011-12-05 | 2013-06-05 | 苏州金川河电子有限公司 | Automatic reclosing device with load detection function separated from breaker and control method thereof |
| CN105788982A (en) * | 2016-04-15 | 2016-07-20 | 泉州市大西洋电力科技有限公司 | Switch circuit breaker |
| CN110391640A (en) * | 2018-04-23 | 2019-10-29 | 南京捷泰电力设备有限公司 | A kind of Household electricity leakage protection device that can be closed a floodgate with leakage current |
-
2004
- 2004-09-03 CN CN 200420089197 patent/CN2746621Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138226A (en) * | 2011-12-05 | 2013-06-05 | 苏州金川河电子有限公司 | Automatic reclosing device with load detection function separated from breaker and control method thereof |
| CN103138226B (en) * | 2011-12-05 | 2015-12-16 | 苏州金川河电子有限公司 | The auto recloser of the bringing onto load measuring ability be separated with circuit breaker and control method |
| CN102931034B (en) * | 2012-07-27 | 2016-05-04 | 国网山东省电力公司莱西市供电公司 | Rccb |
| CN102931034A (en) * | 2012-07-27 | 2013-02-13 | 苏州贝腾特电子科技有限公司 | Leakage circuit breaker |
| CN102904208A (en) * | 2012-07-27 | 2013-01-30 | 苏州贝腾特电子科技有限公司 | Leakage breaker |
| CN102904208B (en) * | 2012-07-27 | 2016-08-03 | 常安集团有限公司 | A kind of RCCB |
| CN105895464A (en) * | 2012-07-27 | 2016-08-24 | 赵牧青 | Residual current circuit breaker having automatic closing function |
| CN106158540A (en) * | 2012-07-27 | 2016-11-23 | 赵牧青 | A kind of RCCB with electric switch-on function |
| CN106159893A (en) * | 2012-07-27 | 2016-11-23 | 赵牧青 | There is the RCCB of reclosing function |
| CN102904202B (en) * | 2012-10-29 | 2015-09-09 | 浙江星明智能电气科技有限公司 | Intelligent reclosing circuit breaker |
| CN102904202A (en) * | 2012-10-29 | 2013-01-30 | 浙江星明智能电气科技有限公司 | Intelligent re-closing circuit breaker |
| CN105788982A (en) * | 2016-04-15 | 2016-07-20 | 泉州市大西洋电力科技有限公司 | Switch circuit breaker |
| CN110391640A (en) * | 2018-04-23 | 2019-10-29 | 南京捷泰电力设备有限公司 | A kind of Household electricity leakage protection device that can be closed a floodgate with leakage current |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |