CN202059152U - Power leakage protective device suitable for real-time parameter display - Google Patents
Power leakage protective device suitable for real-time parameter display Download PDFInfo
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- CN202059152U CN202059152U CN2011201133515U CN201120113351U CN202059152U CN 202059152 U CN202059152 U CN 202059152U CN 2011201133515 U CN2011201133515 U CN 2011201133515U CN 201120113351 U CN201120113351 U CN 201120113351U CN 202059152 U CN202059152 U CN 202059152U
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Abstract
The utility model relates to a power leakage protective device suitable for real-time parameter display, which comprises a power leakage detecting circuit, a power leakage zero sequence mutual inductor, a self-diagnosis circuit, a central control unit, a tripping and closing control circuit, a data storage, an undervoltage, overcurrent, phase failure and zero breaking detecting circuit, an inquiry and setting button circuit, and a display and indicator light circuit, wherein the power leakage zero sequence mutual inductor and the self-diagnosis circuit are connected with a leakage current signal input end of the power leakage detection circuit; the central control unit is connected with a leakage current signal output end of the power leakage detection circuit; the tripping and switching-on control circuit is connected with the central control unit; the data storage is connected with the central control unit and is used for recording tripping times and the switching-on times; and the undervoltage, overcurrent, phase failure and zero breaking detecting circuit, the inquiry and setting button circuit and the display and indicator light circuit are respectively 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 earth leakage protective device that real-time parameter shows 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; 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 have under-voltage, overvoltage, phase shortage, disconnected zero defencive function; the automatic reclosing function; memory function, the earth leakage protective device that is suitable for the real-time parameter demonstration of self-diagnostic function and the automatic following function of residual current.
For solving the problems of the technologies described above; the utility model provides a kind of earth leakage protective device that real-time parameter shows that is suitable for; 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; 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.
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: (1) earth leakage protective device that is suitable for the real-time parameter demonstration of the present utility model is suitable for carrying out remote data communication by RS-485, also have: 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 real-time parameter demonstration 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 real-time parameter demonstration of embodiment 1;
Fig. 2 is above-mentioned under-voltage, overcurrent, phase shortage, disconnected zero testing circuit that is suitable in the earth leakage protective device that real-time parameter shows;
Fig. 3 is the above-mentioned electrical schematic diagram that is suitable for the central control unit in the earth leakage protective device that real-time parameter shows;
Fig. 4 is the above-mentioned dropout control circuit that is suitable in the earth leakage protective device that real-time parameter shows;
Fig. 5 is the above-mentioned contacting controling circuit that is suitable in the earth leakage protective device that real-time parameter shows;
Fig. 6 is above-mentioned electric-leakage detection circuit, electric leakage zero-sequence transformer and the self-diagnostic circuit that is suitable in the earth leakage protective device that real-time parameter shows;
Fig. 7 is the above-mentioned RS-485 data communication circuit that is suitable in the earth leakage protective device that real-time parameter shows.
Embodiment
See Fig. 1-7; the earth leakage protective device that is suitable for the real-time parameter demonstration of present embodiment comprises: electric-leakage detection circuit; the electric leakage zero-sequence transformer L1 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 RS-485 data communication 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.
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 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 ATmega32-16AI 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 (1)
1. one kind is suitable for the earth leakage protective device that real-time parameter shows; it is characterized in that comprising: 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; 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, the demonstration that is used for real-time display parameters and the indicator light circuit that link to each other with central control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201133515U CN202059152U (en) | 2011-04-18 | 2011-04-18 | Power leakage protective device suitable for real-time parameter display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201133515U CN202059152U (en) | 2011-04-18 | 2011-04-18 | Power leakage protective device suitable for real-time parameter display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202059152U true CN202059152U (en) | 2011-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201133515U Expired - Fee Related CN202059152U (en) | 2011-04-18 | 2011-04-18 | Power leakage protective device suitable for real-time parameter display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202059152U (en) |
-
2011
- 2011-04-18 CN CN2011201133515U patent/CN202059152U/en not_active Expired - Fee Related
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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: 20111130 Termination date: 20150418 |
|
| EXPY | Termination of patent right or utility model |