CN202094599U - Leakage protector adapted to electromagnetic trip circuit - Google Patents
Leakage protector adapted to electromagnetic trip circuit Download PDFInfo
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- CN202094599U CN202094599U CN2011201133229U CN201120113322U CN202094599U CN 202094599 U CN202094599 U CN 202094599U CN 2011201133229 U CN2011201133229 U CN 2011201133229U CN 201120113322 U CN201120113322 U CN 201120113322U CN 202094599 U CN202094599 U CN 202094599U
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Abstract
The utility model relates to a leakage protector adapted to an electromagnetic trip circuit, comprising an electric leakage detection circuit, an electric leakage zero sequence mutual inductor, a self-diagnosis circuit, a central control unit, an electromagnetic trip circuit connected with the central control unit, a switching on control circuit connected with the central control unit, a data memory connected with the central control unit, a detection circuit connected with the central control unit, a query and arrangement button circuit connected with the central control unit and a display and indicating lamp circuit connected with the central control unit, wherein the electromagnetic trip circuit comprises a driving circuit and a trip motion circuit; the driving circuit comprises a transistor, wherein a base electrode of the transistor, a shunt resistor and a filtering capacitor are electrically connected with a signal output end of the central control unit via a voltage limiting resistor, an emitting electrode of the transistor, the other end of the shunt resistor and the other end of the filtering capacitor are grounded, and a collector electrode of the transistor is electrically connected with a voltage stabilizing power supply via a solenoid and a protective circuit parallelly connected with the solenoid; and an anode of the trip motion circuit is electrically connected with a cathode of the trip motion circuit by successively passing a fuse, a backward diode and a solenoid contact, and two ends of the backward diode are parallelly connected with connecting pieces.
Description
Technical field
The utility model relates to the technical field of intelligent residual current circuit breaker, specifically is a kind of earth leakage protective device that is suitable for the electromagnetic trip circuit.
Background technology
The main effect of residual current circuit breaker of the prior art is earth leakage protective and overload protection etc.; it does not have automatic reclosing, memory function, under-voltage protection, overvoltage protection, open-phase protection, disconnected zero protection and self-diagnostic function; and there is the dead band in detection of electrical leakage; can not be to residual current from motion tracking; can not remote data communication; so the function of existing residual current circuit breaker is more single, when electric leakage occurring, can not in time finish the action of threading off, can not satisfy the demand of practical application.
The utility model content
Technical problem to be solved in the utility model provides the earth leakage protective device of a kind of trip circuit that can in time finish the action of threading off.
For solving the problems of the technologies described above, the utility model provides a kind of earth leakage protective device that is suitable for the electromagnetic trip circuit, comprise: electric-leakage detection circuit, the electric leakage zero-sequence transformer and the self-diagnostic circuit that link to each other with the leakage current signal input part of electric-leakage detection circuit, the central control unit that links to each other with the electric leakage signal output of electric-leakage detection circuit, the electromagnetic trip circuit that links to each other with central control unit, contacting controling circuit, the data storage that is used to write down dropout number of times and combined floodgate number of times that links to each other with central control unit, what link to each other with central control unit is under-voltage, overcurrent, phase shortage, disconnected zero testing circuit, the inquiry that links to each other with central control unit and button circuit is set, demonstration that links to each other with central control unit and indicator light circuit; Described electromagnetic trip circuit comprises drive circuit, dropout actuating circuit;
Drive circuit comprises a transistor (Q1), and transistor (Q1) is provided with base stage, collector electrode, emitter; The base stage of transistor (Q1), shunt resistance (R6), filter capacitor (C6) are electrically connected the signal output part of central control unit by pressure limiting resistance (R3), the other end of the other end of the emitter of transistor (Q1), shunt resistance (R6), filter capacitor (C6) ground connection that is electrically connected, the collector electrode of transistor (Q1) are by solenoid, be electrically connected stabilized voltage power supply with the protective circuit of solenoid parallel connection;
Dropout actuating circuit positive pole is electrically connected the negative pole of dropout actuating circuit successively by fuse (F1), backward diode (D1), solenoid contact (K1), described backward diode (D1) two ends are parallel with connector (J1).
Further, described protective circuit comprises unilateral diode (D3), divider resistance (R2); The positive pole of unilateral diode (D3) is electrically connected solenoid by transistor (Q1) emitter terminal by divider resistance (R2), and the negative electricity of unilateral diode (D3) connects solenoid by the stabilized voltage power supply end.
Further, described transistor is a triode.
The utlity model has positive effect: (1) earth leakage protective device that is suitable for the electromagnetic trip circuit of the present utility model, adopt the electromagnetic trip mode to thread off, send trip signal by CPU, the transistor base received signal, transistor collector and emitter are connected, the solenoid energising, to the effect of solenoid contact, the both positive and negative polarity that the solenoid contact is communicated with the dropout actuating circuit reaches the dropout effect; This is simple in structure and can in time finish the action of threading off, and has improved the defencive function of earth leakage protective device, and practicality strengthens.
(2) earth leakage protective device that is suitable for the electromagnetic trip circuit of the present utility model also has: specified leakage current is adjustable, open-phase protection, under-voltage protection, overvoltage protection, overcurrent protection, short-circuit protection, disconnected zero protection, memory function and long-range ancillary control function; Have also that break-time is adjustable, vector protection, self diagnosis and automatic reclosing function.Automatic reclosing is the effective anti-accident measures that is applied in overhead wire transmission of electricity and the overhead wire supply line, promptly after circuit breaks down, relaying protection makes circuit breaker trip, circuit breaker is closed again.In most cases, line fault (as thunderbolt, windburn etc.) is temporary, and the insulation property of circuit behind the circuit breaker trip (insulator and air gap) can be restored, and overlapping once more can be successful, and this has just improved the reliability of power system power supply.A few cases belongs to permanent fault, and tripping is again moved by relaying protection in auto recloser action back, ascertains the reason, and is got rid of and send.Generally speaking, line fault tripping operation back reclosing is fast more, and effect is good more.Be 0.15～0.5 second the shortest blanking time that reclosing allows.The circuit rated voltage is high more, and the insulation deionization time is long more.The success rate of automatic reclosing changes according to line construction, electric pressure, meteorological condition, major failure type etc. and decides.According to the China Power department statistics, generally can reach 60%～90%.The anti-accident measures of the another kind of extensive use of electricity consumption department is that stand-by power supply drops into automatically, and required time is 0.2～0.5 second usually.Its required investment is few and to keep the economic benefit that normal power supply brings very big.(2) earth leakage protective device that is suitable for the electromagnetic trip circuit of the present utility model has disconnected zero defencive function; in case circuit occurs disconnected zero; it can close high pressure and low-voltage circuit input automatically in disconnected zero back 20ms, guarantee power consumption equipment safety, can prevent that disconnected zero sends out accident mutually.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, below the specific embodiment and in conjunction with the accompanying drawings of basis, the utility model is described in further detail, wherein:
Fig. 1 is the circuit block diagram of the earth leakage protective device that is suitable for the electromagnetic trip circuit of embodiment 1;
Fig. 2 is the above-mentioned electromagnetic trip circuit that is suitable for the earth leakage protective device of electromagnetic trip circuit;
Fig. 3 is the electrical schematic diagram of the central control unit of the above-mentioned earth leakage protective device that is suitable for the electromagnetic trip circuit;
Fig. 4 is under-voltage, overcurrent, phase shortage, disconnected zero testing circuit of the above-mentioned earth leakage protective device that is suitable for the electromagnetic trip circuit;
Fig. 5 is the above-mentioned contacting controling circuit that is suitable for the earth leakage protective device of electromagnetic trip circuit;
Fig. 6 is above-mentioned electric-leakage detection circuit, electric leakage zero-sequence transformer and the self-diagnostic circuit that is suitable for the earth leakage protective device of electromagnetic trip circuit;
Fig. 7 is the above-mentioned RS-485 data communication circuit that is suitable for the earth leakage protective device of electromagnetic trip circuit.
Embodiment
See Fig. 1-7, the earth leakage protective device that is suitable for the electromagnetic trip circuit of present embodiment comprises: electric-leakage detection circuit, the electric leakage zero-sequence transformer and the self-diagnostic circuit that link to each other with the leakage current signal input part of electric-leakage detection circuit, the central control unit that links to each other with the electric leakage signal output of electric-leakage detection circuit, the electromagnetic trip circuit and the contacting controling circuit that link to each other with central control unit, the data storage that is used to write down dropout number of times and combined floodgate number of times that links to each other with central control unit, what link to each other with central control unit is under-voltage, overcurrent, phase shortage, disconnected zero testing circuit, the inquiry that links to each other with central control unit and button circuit is set, demonstration that links to each other with central control unit and indicator light circuit; Described electromagnetic trip circuit comprises drive circuit, dropout actuating circuit;
Drive circuit comprises a transistor (Q1), and transistor (Q1) is provided with base stage, collector electrode, emitter; The base stage of transistor (Q1), shunt resistance (R6), filter capacitor (C6) are electrically connected the signal output part (RC6) of central control unit by pressure limiting resistance (R3), the other end of the other end of the emitter of transistor (Q1), shunt resistance (R6), filter capacitor (C6) ground connection that is electrically connected, the collector electrode of transistor (Q1) are by solenoid, be electrically connected stabilized voltage power supply with the protective circuit of solenoid parallel connection;
Dropout actuating circuit positive pole is electrically connected the negative pole of dropout actuating circuit successively by fuse (F1), backward diode (D1), solenoid contact (K1), described backward diode (D1) two ends are parallel with connector (J1).
Described protective circuit comprises unilateral diode (D3), divider resistance (R2); The positive pole of unilateral diode (D3) is electrically connected solenoid by transistor (Q1) emitter terminal by divider resistance (R2), and the negative electricity of unilateral diode (D3) connects solenoid by the stabilized voltage power supply end.
Described transistor is a triode.
Described RS-485 data communication circuit comprises: data communication drive circuit that links to each other with described central control unit and the RS-485 datacom chip that links to each other with this data communication drive circuit.
Described under-voltage, overcurrent, phase shortage, disconnected zero testing circuit comprise: operational amplifier U10A, U10B, U10C, U10D, U13A, U13B, U13C and peripheral auxiliary element thereof.
It is the single-chip microcomputer of ATmega32-16AI that central control unit adopts model, and wherein, RA0 is the electric leakage signal input.It is the eeprom chip of 24C64 that data storage adopts model.Self-diagnostic circuit comprises the leakage tests button S9 that is connected on the electric leakage zero-sequence transformer L1.Electric-leakage detection circuit comprises operational amplifier U4A and peripheral auxiliary element thereof.
The signal output part RC6 of CPU sends trip signal, receive trip signal by triode Q1 base stage, the collector electrode of turn-on transistor and emitter, supply voltage is through solenoid ground connection, promptly solenoid is switched on, produce electromagnetic force to the K1 effect of solenoid contact, the both positive and negative polarity that makes solenoid contact K1 be communicated with the dropout actuating circuit reaches the dropout effect.
All indicator lights in the residual current circuit breaker are red, and are corresponding with the implication that shows numerical value:
1) during the residual current circuit breaker operate as normal, LED lamp (charactron) circulation shows:
A) " A/ electric current " indicator light on display window the right is bright, and charactron kilobit letter F represents the main circuit current set point;
B) " A/ electric current " indicator light on display window the right is bright, charactron kilobit letter A, and B, C, N represent the real-time load current of the every phase of main circuit;
C) " V/ voltage " indicator light on display window the right is bright, charactron kilobit letter A, and B, C represent the real-time voltage value of the every phase of main circuit;
2) transfinite when tripping operation when residual current circuit breaker detects gradual residual current, " gradual " indicator light is bright.
3) when residual current circuit breaker detected overcurrent, short circuit tripping operation, " overload " indicator light was bright.
4) when residual current circuit breaker detected under-voltage, overvoltage tripping operation, charactron showed " GY " or " QY ", recovered normal until supply voltage.
6) when the automatic following function of residual current circuit breaker was enabled, " from motion tracking " indicator light was bright.
7) when the alarm function of residual current circuit breaker is enabled, " alarm " indicator light is bright; When the operating current of circuit transfinites, " alarm indicator flicker ", residual current circuit breaker does not trip.
8) when overcurrent (short circuit current) value of tripping operation or residual electricity flow valuve surpassed 3 figure places, charactron showed " FFF ".
Main display message: residual current circuit breaker is carried out trial line charging, if be in off-state, and the incoming call switch knob is at the then residual current circuit breaker meeting automatic closing of closing position that powers on; If residual current circuit breaker has been in "on" position during incoming call, get final product bringing normally into operation.
Inquiry is set and is withdrawed from: during bringing normally into operation, by " inquiry " key, query function is lighted and activated to " inquiry " operating state lamp, enter query option, query contents comprises " residual current acting value ", " residual current break-time ", " real-time parameter demonstration ", " nominal load current ", " operator password setting ", " functional status setting ", " trip parameters demonstration ", " clock inquiry be provided with ", " this machine address setting ", " cross, low-voltage time be provided with "; By " inquiry " key, browse from left to right one by one, and corresponding indicator light is bright, expression is selected this.
Behind the complete operation,, can withdraw from query function by " determining " key.If do not do any button operation in 10 seconds, then withdraw from query function automatically.
The residual current acting value is provided with: activate query function, at first enter the inquiry of residual current acting value and function is set, " inquiry " lamp of operating state is bright, by behind " setting " key, " setting " lamp of operating state is bright, and " inquiry " lamp goes out, and continues to revise the residual current acting value by " setting " key, the value of revising can be selected in 100mA, 300mA, 500mA, 1000mA and Auto (from motion tracking), confirms to revise by " determining " key.
Electric leakage action break-time setting: activate query function, one by one by " inquiry " key, wherein a lamp is bright with " inquiry " lamp until having only " electric leakage action break-time ", selected this function of expression, by behind " setting " key, " setting " lamp of operating state is bright, " inquiry " lamp goes out, continue to revise the residual current acting time by " setting " key, the value of modification can be selected in 0.2s, 0.3s, 0.5s and 1s, confirms to revise by " determining " key.
Real-time parameter shows setting: activate query function, by " inquiry " key, bright one by one until " inquiry " lamp of " real-time parameter demonstration " lamp and operating state, selected this function of expression, this moment is more one by one by " option " key, can browse following real time data information successively:
● A phase load electric current
● B phase load electric current
● C phase load electric current
● N phase load electric current
● the A phase voltage
● the B phase voltage
● the C phase voltage
● real-time leakage current value
Identical with main display message, just this moment, the real-time parameter indicator light was bright.
Nominal load current is provided with: activate query function, and by " inquiry " key, bright one by one until " inquiry " lamp of " nominal load current " lamp and operating state, selected this function of expression, make amendment by " setting " key, can point out the input password this moment, and " inquiry " lamp goes out.During the input password, " underscore " expression selected bit is revised numerical value by " setting " key, selects next bit by " option " key again, and the four figures value is confirmed by " determining " key after all having imported.If the password input correctly, then bright " nominal load current " modify feature that promptly enters of " setting " work light is pressed " setting " key again and is revised the nominal load current value, by determining key affirmation modification.
Operator password is set: activate query function, and by " inquiry " key, bright one by one until " inquiry " lamp of " operator password setting " lamp and operating state, selected this function of expression, display window shows.During the input password, " underscore " expression selected bit is revised numerical value by " setting " key, selects next bit by " option " key again, and the four figures value is confirmed by " determining " key after all having imported.If the password input is correct, then " setting " work light is bright, the new password of prompting input at this moment.If the input cryptographic interface is then returned in the password input error, can input password once more one time; If main interface is then returned in input error once more.New password input finishes the back by the affirmation of " determining " key, withdraws from when entering once more behind the query function, and new password comes into force.
Functional status is provided with: activate query function, by " inquiry " key, bright until " inquiry " lamp of " functional status setting " lamp and operating state one by one, selected this function of expression enters by " setting " key, and can point out the input password this moment.If the input password is correct, then " setting " lamp is bright promptly enters " functional status setting " function, browses by " option " key, carries out numerical value by " setting " key and revises (" 0 " expression is closed or forbidden, " 1 " expression is opened or enabled).
Trip parameters shows: activate query function, one by one by " inquiry " key, " inquiry " lamp until " trip parameters demonstration " lamp and operating state is bright, selected this function of expression, can select " inquiry of tripping operation number of times " or " inquiry of tripping operation details " by " option " key, determine option by " determining " key.
Cross, the low-voltage time is provided with: activate query function,, show that until charactron " inquiry " lamp of " GQY " and operating state is bright, represent to select this function one by one by " inquiry " key.As the need query modification cross, the low-voltage time, then by " settings " key, can point out the input password at this moment.As it is correct to input password, then can enter, low-voltage time inquiry, the interface is set, and the numeral that this moment, charactron showed is current operate time, is unit with mS, revise if need not, then directly withdraw from, revise, then revise by " setting " key as need by " determining " key, the operating value gear is divided into six gears of 500/1000/1500/2000/2500/3000mS, finishes modification by " determining " key after modification is finished.
The foregoing description only is for the utility model example clearly is described, and is not to be qualification to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all execution modes.And these belong to conspicuous variation or the change that spirit of the present utility model extended out and still are among the protection range of the present utility model.
Claims (3)
1. earth leakage protective device that is suitable for the electromagnetic trip circuit, its feature comprises: electric-leakage detection circuit, the electric leakage zero-sequence transformer and the self-diagnostic circuit that link to each other with the leakage current signal input part of electric-leakage detection circuit, the central control unit that links to each other with the electric leakage signal output of electric-leakage detection circuit, the electromagnetic trip circuit that links to each other with central control unit, contacting controling circuit, the data storage that is used to write down dropout number of times and combined floodgate number of times that links to each other with central control unit, what link to each other with central control unit is under-voltage, overcurrent, phase shortage, disconnected zero testing circuit, the inquiry that links to each other with central control unit and button circuit is set, demonstration that links to each other with central control unit and indicator light circuit; Described electromagnetic trip circuit comprises drive circuit, dropout actuating circuit;
Drive circuit comprises a transistor (Q1), and transistor (Q1) is provided with base stage, collector electrode, emitter; The base stage of transistor (Q1), shunt resistance (R6), filter capacitor (C6) are electrically connected the signal output part of central control unit by pressure limiting resistance (R3), the other end of the other end of the emitter of transistor (Q1), shunt resistance (R6), filter capacitor (C6) ground connection that is electrically connected, the collector electrode of transistor (Q1) are by solenoid, be electrically connected stabilized voltage power supply with the protective circuit of solenoid parallel connection;
Dropout actuating circuit positive pole is electrically connected the negative pole of dropout actuating circuit successively by fuse (F1), backward diode (D1), solenoid contact (K1), described backward diode (D1) two ends are parallel with connector (J1).
2. the described earth leakage protective device that is suitable for the electromagnetic trip circuit of root a tree name claim 1, it is characterized in that: described protective circuit comprises unilateral diode (D3), divider resistance (R2); The positive pole of unilateral diode (D3) is electrically connected solenoid by transistor (Q1) emitter terminal by divider resistance (R2), and the negative electricity of unilateral diode (D3) connects solenoid by the stabilized voltage power supply end.
3. the described earth leakage protective device that is suitable for the electromagnetic trip circuit of root a tree name claim 2, it is characterized in that: described transistor is a triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201133229U CN202094599U (en) | 2011-04-18 | 2011-04-18 | Leakage protector adapted to electromagnetic trip circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201133229U CN202094599U (en) | 2011-04-18 | 2011-04-18 | Leakage protector adapted to electromagnetic trip circuit |
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| CN202094599U true CN202094599U (en) | 2011-12-28 |
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| CN2011201133229U Expired - Fee Related CN202094599U (en) | 2011-04-18 | 2011-04-18 | Leakage protector adapted to electromagnetic trip circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931034A (en) * | 2012-07-27 | 2013-02-13 | 苏州贝腾特电子科技有限公司 | Leakage 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 |
| CN108199346A (en) * | 2018-01-15 | 2018-06-22 | 浙江正泰电器股份有限公司 | Band voluntarily diagnoses the residual current action breaker circuit of detection function |
-
2011
- 2011-04-18 CN CN2011201133229U patent/CN202094599U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931034A (en) * | 2012-07-27 | 2013-02-13 | 苏州贝腾特电子科技有限公司 | Leakage circuit breaker |
| 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 |
| CN105895464A (en) * | 2012-07-27 | 2016-08-24 | 赵牧青 | Residual current circuit breaker having automatic closing function |
| CN106159893A (en) * | 2012-07-27 | 2016-11-23 | 赵牧青 | There is the RCCB of reclosing function |
| CN106158540A (en) * | 2012-07-27 | 2016-11-23 | 赵牧青 | A kind of RCCB with electric switch-on function |
| 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 |
| CN108199346A (en) * | 2018-01-15 | 2018-06-22 | 浙江正泰电器股份有限公司 | Band voluntarily diagnoses the residual current action breaker circuit of detection function |
| CN108199346B (en) * | 2018-01-15 | 2024-05-14 | 浙江正泰电器股份有限公司 | Residual current operated circuit breaker circuit with self-diagnosis and detection function |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20150418 |
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| EXPY | Termination of patent right or utility model |