CN202094598U - Rated current adjustable leakage protector - Google Patents
Rated current adjustable leakage protector Download PDFInfo
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- CN202094598U CN202094598U CN2011201132688U CN201120113268U CN202094598U CN 202094598 U CN202094598 U CN 202094598U CN 2011201132688 U CN2011201132688 U CN 2011201132688U CN 201120113268 U CN201120113268 U CN 201120113268U CN 202094598 U CN202094598 U CN 202094598U
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Abstract
The utility model relates to a rated load current adjustable leakage protector which is characterized by comprising a leakage detection circuit, a leakage zero-sequence mutual inductor and a self-diagnosis circuit, a central control unit, a tripping and closing control circuit, a data memory, an undervoltage, overcurrent, phase lack and neutral line fault detection circuit, a rated load current adjustable circuit, a querying and button setting circuit as well as a display and indicator lamp circuit, wherein the leakage zero-sequence mutual inductor and the self-diagnosis circuit are connected with a leakage signal input end of the leakage current circuit; the central control unit is connected with a leakage signal output end of the leakage current circuit; the tripping and closing control circuit is connected with the central control unit; the data memory is connected with the central control unit and used for recording tripping frequency and closing frequency; the undervoltage, overcurrent, phase lack and neutral line fault detection circuit is connected with the central control unit; the rated load current adjustable circuit is connected with the central control unit; the querying and button setting circuit is connected with the central control unit; and the display and indicator lamp circuit is connected with the central control unit.
Description
Technical field
The utility model relates to the technical field of intelligent residual current circuit breaker, specifically is a kind of adjustable earth leakage protective device of nominal load current that is suitable for.
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; there is rated current unadjustable to required in the different circuit; can not remote data communication, so the function of existing residual current circuit breaker is more single, can not satisfy the demand of practical application.
The utility model content
Technical problem to be solved in the utility model provides a kind of scalable nominal load current function that has; under-voltage, overvoltage, phase shortage, disconnected zero defencive function; the automatic reclosing function; memory function, self-diagnostic function and the automatic following function of residual current be suitable for the adjustable earth leakage protective device of rated current.
For solving the problems of the technologies described above; the utility model provides a kind of adjustable earth leakage protective device of nominal load current that is suitable for; 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; dropout that links to each other with central control unit and 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 nominal load current conditioned circuit that links to each other with central control unit; 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.
Further, described nominal load current conditioned circuit comprises: selector switch, the central control unit signal end that links to each other with selector switch.
Further, described dropout and contacting controling circuit comprise: release, be used to control first relay and first relay drive circuit that links to each other with described central control unit of release power supply.
Further, described dropout and contacting controling circuit also comprise: second relay and second relay drive circuit that links to each other with described central control unit that close a floodgate and control motor, be used to control this combined floodgate control motor power.
The utlity model has positive effect: the adjustable earth leakage protective device of (1) nominal load current of the present utility model is suitable for by regulating the further protective circuit equipment of specified leakage current; It also has: data storage record dropout number of times and combined floodgate number of times, 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) the adjustable earth leakage protective device of nominal load current that is suitable for 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 adjustable earth leakage protective device of the nominal load current of embodiment 1;
Fig. 2 is above-mentioned under-voltage, overcurrent, phase shortage, disconnected zero testing circuit that is suitable in the adjustable earth leakage protective device of nominal load current;
Fig. 3 is the above-mentioned electrical schematic diagram that is suitable for the central control unit in the adjustable earth leakage protective device of nominal load current;
Fig. 4 is the above-mentioned dropout control circuit that is suitable in the adjustable earth leakage protective device of nominal load current;
Fig. 5 is the above-mentioned contacting controling circuit that is suitable in the adjustable earth leakage protective device of nominal load current;
Fig. 6 is above-mentioned electric-leakage detection circuit, electric leakage zero-sequence transformer and the self-diagnostic circuit that is suitable in the adjustable earth leakage protective device of nominal load current;
Fig. 7 is the above-mentioned RS-485 data communication circuit that is suitable in the adjustable earth leakage protective device of nominal load current.
Embodiment
See Fig. 1-7; present embodiment be suitable for the adjustable earth leakage protective device of nominal load current; 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; dropout that links to each other with central control unit and 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 nominal load current conditioned circuit that links to each other with central control unit; 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.Further, described nominal load current conditioned circuit comprises: selector switch, the central control unit signal end that links to each other with selector switch.
Described dropout and contacting controling circuit comprise: release, be used to control first relay and first relay drive circuit that links to each other with described central control unit of release power supply.
Described dropout and contacting controling circuit also comprise: second relay and second relay drive circuit that links to each other with described central control unit that close a floodgate and control motor, be used to control this combined floodgate control motor power.
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 ATmega 32-16AI that central control unit adopts model, and wherein, RA0 is that electric leakage signal input, RC6 are used to thread off the dropout control end of control.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.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 (2)
1. one kind is suitable for the adjustable earth leakage protective device of nominal load current; 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; dropout that links to each other with central control unit and 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 nominal load current conditioned circuit that links to each other with central control unit; 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.
2. the adjustable earth leakage protective device of nominal load current that is suitable for according to claim 1, it is characterized in that: described nominal load current conditioned circuit comprises: selector switch, the central control unit signal end that links to each other with selector switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201132688U CN202094598U (en) | 2011-04-18 | 2011-04-18 | Rated current adjustable leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201132688U CN202094598U (en) | 2011-04-18 | 2011-04-18 | Rated current adjustable leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202094598U true CN202094598U (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201132688U Expired - Fee Related CN202094598U (en) | 2011-04-18 | 2011-04-18 | Rated current adjustable leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202094598U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104253406A (en) * | 2013-06-26 | 2014-12-31 | 成都昊地科技有限责任公司 | Protective circuit capable of regulating rated voltage and rated current |
| CN105191038A (en) * | 2013-03-19 | 2015-12-23 | 松下知识产权经营株式会社 | Distribution system and current limiting device |
| CN110007175A (en) * | 2019-04-17 | 2019-07-12 | 北京电子工程总体研究所 | A kind of test device |
-
2011
- 2011-04-18 CN CN2011201132688U patent/CN202094598U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105191038A (en) * | 2013-03-19 | 2015-12-23 | 松下知识产权经营株式会社 | Distribution system and current limiting device |
| CN104253406A (en) * | 2013-06-26 | 2014-12-31 | 成都昊地科技有限责任公司 | Protective circuit capable of regulating rated voltage and rated current |
| CN110007175A (en) * | 2019-04-17 | 2019-07-12 | 北京电子工程总体研究所 | A kind of test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |
|
| EXPY | Termination of patent right or utility model |