CN101673645B - Automatic regulator for rated protection current of circuit breakers - Google Patents
Automatic regulator for rated protection current of circuit breakersDownload PDFInfo
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- CN101673645B CN101673645BCN2009102091822ACN200910209182ACN101673645BCN 101673645 BCN101673645 BCN 101673645BCN 2009102091822 ACN2009102091822 ACN 2009102091822ACN 200910209182 ACN200910209182 ACN 200910209182ACN 101673645 BCN101673645 BCN 101673645B
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- 238000006243chemical reactionMethods0.000claimsabstractdescription10
- 230000001681protective effectEffects0.000claimsdescription32
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Abstract
Description
Technical field
The present invention relates to the distribution field, specifically, relate to a kind of automatic regulator for rated protection current of circuit breakers.
Background technology
In distribution system, need in the loop, be respectively equipped with main circuit breaker and the branch circuit breaker in the duplexure in the major loop in a lot of environments for use.Wherein main circuit breaker is as the master switch of connection or disjunction power supply, the effect of the main protection switch in the time of also will playing various overloads or short trouble simultaneously.In the prior art; The quantity of branch circuit breaker increases and decreases to some extent in the subordinate's of main circuit breaker in the major loop duplexure; Or the specified protective current value of its subordinate's said branch circuit breaker is when changing to some extent; The specified protective current value of said main circuit breaker is to need be according to the demand in loop artificial again calculating and adjusting, and then the manual specified protective current that main circuit breaker is set.
Like this, when branch circuit breaker described in loop change was relatively more frequent, because after changing each, the artificial specified protective current value of calculating of all need passing through of main circuit breaker was provided with main circuit breaker then by hand, so that staff's working strength is bigger.
And, owing to main circuit breaker in the major loop in the prior art can not carry out the Real-time and Dynamic adjustment according to closing of duplexure capacity.Therefore the main circuit breaker in the major loop can not carry out timely and effective protection to the branch circuit breaker and the equipment on the duplexure of duplexure, thereby makes that the equipment in the loop is higher because of damage or fault occurrence probability that overcurrent causes.
Summary of the invention
In view of this, the present invention provides a kind of automatic regulator for rated protection current of circuit breakers, to be able to carry out automatically according to closing of duplexure capacity the purpose of Real-time and Dynamic adjustment.
For realizing above-mentioned purpose, the invention provides following technical scheme:
A kind of automatic regulator for rated protection current of circuit breakers comprises: sample circuit, analog-digital commutator, microcontroller and signal output apparatus;
Said sample circuit comprises the resistance of the preset resistance of connecting with auxiliary contact switch; The corresponding sample circuit of each duplexure;
The branch circuit breaker of said auxiliary contact switch in the corresponding duplexure of said sample circuit comes into force said sample circuit when closed, and said branch circuit breaker makes said sample circuit lose efficacy when breaking off;
Current analog signal with circuit when sample circuit comes into force transfers to analog-digital commutator;
The analog signal conversion that analog-digital commutator is used for said sample circuit is a digital signal;
Be provided with ALU in the said microcontroller, said ALU generates control signal with said digital signal according to certain logical operation rule;
Signal output apparatus is used for said control signal is exported with the mode of digital controlled signal or analog control signal.
Preferably, in the embodiment of the invention, also be provided with and be used to monitor whether effectively indicator light of each duplexure.
Preferably, in the embodiment of the invention, comprise in the said operation rule that using adder that the numerical value of said digital signal is carried out the addition union generates effective total value; And carry out logical operation with preset maximum total value, draw the percentage that said effective total value accounts for maximum total value.
Preferably, in the embodiment of the invention, also be provided with the allowance contact switch; Said ALU also includes the allowance parameter that is used to adjust the load error of calculation;
Said allowance contact switch is provided for calling the pulse signal of the logic parameter of different allowances to logic control element.
Preferably, in the embodiment of the invention, said allowance parameter be said ALU to system's I/O error carry out+20% ,+five allowance parameters using during five grades of adjustment of 10%, 0 ,-10% and-20%.
Preferably, in the embodiment of the invention, also be provided with the initial setting up contact switch;
Said ALU also includes and is used for the initial setting up parameter that initial setting up is selected;
Said initial setting up contact switch is provided for calling the pulse signal of the logic parameter that different initial setting up select to logic control element.
Preferably; In the embodiment of the invention, said initial setting up parameter comprises the initial setting up parameter of corresponding 1.6A, 2.5A, 4A, 6.5A, 8.5A, 10A, 12.5A, 20A, 25A, 32A, 52A, 63A, 80A, 100A, 125A, 160A, 200A, 250A, 320A, 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 4000A, 5000A and 6300A respectively.
Preferably, in the embodiment of the invention, also comprise the display unit that is used for showing the various signal parameter value of said adjuster.
Preferably, in the embodiment of the invention, it is characterized in that said display unit is that display is or/and light emitting diode lamp.
Preferably, in the embodiment of the invention, it is characterized in that said display is a LCD display.
Can find out from above-mentioned technical scheme; The embodiment of the invention is through the specified protective current value real-time sampling of sample circuit with all the effective loops in the whole loop; Convert digital signal into through the analog-to-digital conversion sampled value that is obtained of will sampling then; And then can calculate through the numerical value of microprocessor to digital signal, draw effective total value of the real-time specified protective current that comprises each effective duplexure according to the certain calculation rule, form control signal then.Through the control signal of output device output analog or digital form main circuit breaker is regulated and control then.Specified protective current automatic regulator in the embodiment of the invention can be in the loop effective duplexure when increasing or reducing, make the specified protective current value of main circuit breaker be in rational state automatically timely.Thereby alleviated staff's working strength.
And, because the specified protective current automatic regulator in the embodiment of the invention can carry out the Real-time and Dynamic adjustment to the specified protective current of the main circuit breaker in the major loop.Therefore make the main circuit breaker in the major loop to carry out timely and effective protection, thereby the equipment in the loop that makes effectively reduce because of damage or the fault occurrence probability that overcurrent causes to the branch circuit breaker and the equipment on the duplexure of duplexure.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the principle schematic of embodiment of the invention automatic regulator for rated protection current of circuit breakers.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
As shown in Figure 1, the embodiment of the invention discloses a kind of automatic regulator for rated protection current of circuit breakers, comprise sample circuit, analog-digital commutator, microcontroller and signal output apparatus;
What said sample circuit corresponded respectively to each duplexure is used to monitor the whether effectively sampling of said duplexure; In embodiments of the present invention, said sample circuit is composed in series by the resistance and the auxiliary contact switch of preset resistance.The current ratings capacity equivalence of said preset resistance and branch circuit breaker, for example: if the specified protective current value of the branch circuit breaker of branch 1 is 100A, the resistance value of corresponding resistance 1 is 10K ohm.The resistance value of corresponding resistance was 25K ohm when the specified protective current value of the branch circuit breaker of other branch was 250A so.By that analogy, set the resistance of the sample circuit of all duplexures.
The circuit breaker closing fashionable closure of said auxiliary contact switch in the corresponding duplexure of said sample circuit comes into force said sample circuit, and said auxiliary contact switch when said branch circuit breaker breaks off, and said sample circuit was lost efficacy.Like this, the sample circuit through adding up each duplexure whether come into force just can be real-time the reflection duplexure in the operating position of circuit breaker.And can reflect the specified protective current value of the branch circuit breaker that all are coming into force according to sample circuit kind different preset resistance.
The analog signal of said sample circuit is converted into digital signal through analog-digital commutator and is sent in the microcontroller, and the digital signal that said microcontroller generates said analog-digital commutator generates the microcontroller of control signal according to the certain calculation rule.In the embodiment of the invention, use adder that the numerical value that converts digital signal into through said analog-digital commutator in each duplexure is carried out add operation in the microcontroller.Because different branches circuit breaker operating position makes the situation of coming into force of sample circuit change; Again because the resistance value of the sample circuit of different branches is different; So the digital signal value of the different sample circuits that comes into force after through analog-to-digital conversion also can be different, thereby make the total value of specified protective current of the branch circuit breaker that totally comes into force that can draw whole loop after the microprocessor computing.
Specifically, the specified protective current of the circuit breaker in duplexure 1 is 100A, and when the resistance value of the sample circuit corresponding with it was 10K ohm, the numerical value of the signal of said sample circuit after the number conversion was x.When the specified protective current of the circuit breaker in the duplexure 2 was 250A, the resistance value of the sample circuit corresponding with it was 25K ohm, and the numerical value of the signal of said sample circuit after the number conversion is y.After the over-sampling circuit sampling, can draw a numerical value when by that analogy, the branch circuit breaker in each duplexure is closed.The sampled value of the sample circuit that all come into force is sent to microprocessor after being converted to digital signal by said analog-digital commutator; After said microprocessor is through logical operations such as adder add operations, draw effective total value of the specified protective current of all closed branch circuit breakers in the loop.
It when branch circuit breaker all comes into force in all duplexures of whole loop the maximum total value of specified protective current.According to effective total value account for maximum total value the percentage situation, through after the logical operation, output device output control signal.Said control signal can be that digital controlled signal also can be an analog control signal.
Said output device can cooperate dial-up controller that dial-up regulates (for example: the PR121/P controller that is applicable to ABB Emax series; ABB Tmax PR221DS, PR222DS) etc. the control mode of circuit breaker, according to the different effective total value account for maximum total value the percentage situation generate three the digital controlled signal value that is used to regulate and control said circuit breaker.
The LCD controller that said output device can the points of engagement control be regulated (for example: PR122/P, the PR123/P controller of ABB Emax series) waits the control mode of circuit breaker, according to the different effective total value account for maximum total value the generation of percentage situation be used to regulate and control three digital controlled signal value of said circuit breaker.
When needs cooperate potentiometer adjustment type circuit breaker to use (for example: serial Micrologic controllers such as Schneider MT, MTE; Serial MIC series electronic such as NS, NSX release; Serial ETU series electronic releases such as SIEMENS 3WL, 3WT, 3VL, 3VT); Said output device can according to the different effective total value account for maximum total value the percentage situation generate the control signal of different analog voltage forms, in order to said potentiometer adjustment type circuit breaker is regulated and control.
Can also be provided with in embodiments of the present invention and be used to monitor whether effectively indicator light of each duplexure.Each duplexure is all to there being an indicator light, because each duplexure is all to there being sample circuit, so said indicator light can be connected with sample circuit.Indicator light shows when sample circuit comes into force, otherwise does not show.Can from the automatic regulator for rated protection current of circuit breakers of the embodiment of the invention, observe the ruuning situation of a duplexure so more intuitively.
To the error of major loop at circuit calculating and real work current value, general designer has allowance when loading calculating.In order to reduce this allowance; Make being close of real work current value maximum possible, in embodiments of the present invention, can also be provided with the allowance contact switch with actual value; Corresponding with it, in said ALU, also include the allowance parameter that is used to adjust the load error of calculation.Said allowance contact switch cooperates through the different switches of two contact switchs, has realized to ALU input different pulse signal.And then select different allowance parameters when being implemented in ALU and carrying out logical operation.Through using different said allowance parameters, can carry out+20% to the operation result of ALU ,+10%, 0 ,-10% and-20% adjustment.Realized that thus the operation result that ALU drew that makes is more approaching with the result who uses actual current value institute computing to draw to the segmentation adjustment of the operation result of ALU.
Because in the circuit of reality calculated, different initial maximum rated protective currents will use different computing parameters in circuit calculates.So,, can also be provided with the initial setting up contact switch in the embodiment of the invention in order to support different initial maximum rated protective currents; Corresponding with it, said ALU also includes and is used for the initial setting up parameter that initial setting up is selected; Said initial setting up contact switch is provided for calling the pulse signal of the logic parameter that different initial setting up select to logic control element.
Said initial setting up parameter comprises the initial setting up parameter of corresponding 1.6A, 2.5A, 4A, 6.5A, 8.5A, 10A, 12.5A, 20A, 25A, 32A, 52A, 63A, 80A, 100A, 125A, 160A, 200A, 250A, 320A, 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 4000A, 5000A and 6300A respectively.Thereby the adjuster of the embodiment of the invention can be suitable for to the circuit breaker of above-mentioned various initial maximum rated protective current values.
In embodiments of the present invention, can also comprise the display unit that is used for showing the various signal parameter value of said adjuster.Said display unit can be that display also can make light emitting diode lamp.Said display can be LCD display.Can show parameters such as allowance parameter, initial setting up parameter, effective total value, maximum total value through display or light-emitting diode.Such as, can the corresponding different allowance parameter of each light-emitting diode, can, each said allowance parameter make corresponding lumination of light emitting diode after being selected as indication.Also can indicate said initial setting up parameters of choice through making up by the different light on and off of a plurality of light-emitting diodes.In like manner, display can be accomplished above-mentioned function equally.Thereby the user that can make the automatic regulator for rated protection current of circuit breakers of the embodiment of the invention uses more convenient, can understand the ruuning situation in the loop intuitively.
In sum; The embodiment of the invention is through the specified protective current value real-time sampling of sample circuit with all the effective loops in the whole loop; Convert digital signal into through the analog-to-digital conversion sampled value that is obtained of will sampling then; And then can calculate through the numerical value of microprocessor to digital signal, draw effective total value of the real-time specified protective current that comprises each effective duplexure according to the certain calculation rule, form control signal then.Through the control signal of output device output analog or digital form main circuit breaker is regulated and control then.Specified protective current automatic regulator in the embodiment of the invention can be in the loop effective duplexure when increasing or reducing, make the specified protective current value of main circuit breaker be in rational state automatically timely.Thereby alleviated staff's working strength.
And, because the specified protective current automatic regulator in the embodiment of the invention can carry out the Real-time and Dynamic adjustment to the specified protective current of the main circuit breaker in the major loop.Therefore make the main circuit breaker in the major loop to carry out timely and effective protection, thereby the equipment in the loop that makes effectively reduce because of damage or the fault occurrence probability that overcurrent causes to the branch circuit breaker and the equipment on the duplexure of duplexure.
Claims (9)
1. an automatic regulator for rated protection current of circuit breakers is characterized in that, comprising: sample circuit, analog-digital commutator, microcontroller and signal output apparatus;
Said sample circuit comprises the resistance of the preset resistance of connecting with auxiliary contact switch; The corresponding sample circuit of each duplexure;
The branch circuit breaker of said auxiliary contact switch in the corresponding duplexure of said sample circuit comes into force said sample circuit when closed, and said branch circuit breaker makes said sample circuit lose efficacy when breaking off;
Current analog signal with circuit when sample circuit comes into force transfers to analog-digital commutator;
The analog signal conversion that analog-digital commutator is used for said sample circuit is a digital signal;
Be provided with ALU in the said microcontroller; Said ALU draws effective total value of the specified protective current of all closed branch circuit breakers in the loop after computing; The percentage situation that accounts for the maximum total value of specified protective current according to effective total value of said specified protective current generates control signal, and the maximum total value of said specified protective current is effective total value of the specified protective current when branch circuit breaker all comes into force in all duplexures of whole loop;
Signal output apparatus is used for said control signal is exported with the mode of digital controlled signal or analog control signal.
2. according to the said adjuster of claim 1, it is characterized in that, also be provided with and be used to monitor whether effectively indicator light of each duplexure.
3. according to the said adjuster of claim 1, it is characterized in that, also be provided with the allowance contact switch; Said ALU also includes the allowance parameter that is used to adjust the load error of calculation;
Said allowance contact switch is provided for calling the pulse signal of the logic parameter of different allowances to logic control element.
4. according to the said adjuster of claim 3, it is characterized in that, said allowance parameter be said ALU to system's I/O error carry out+20% ,+five allowance parameters using during five grades of adjustment of 10%, 0 ,-10% and-20%.
5. according to the said adjuster of claim 1, it is characterized in that, also be provided with the initial setting up contact switch;
Said ALU also includes and is used for the initial setting up parameter that initial setting up is selected;
Said initial setting up contact switch is provided for calling the pulse signal of the logic parameter that different initial setting up select to logic control element.
6. according to the said adjuster of claim 5; It is characterized in that said initial setting up parameter comprises the initial setting up parameter of corresponding 1.6A, 2.5A, 4A, 6.5A, 8.5A, 10A, 12.5A, 20A, 25A, 32A, 52A, 63A, 80A, 100A, 125A, 160A, 200A, 250A, 320A, 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 4000A, 5000A and 6300A respectively.
7. according to the said adjuster of claim 1, it is characterized in that, also comprise the display unit that is used for showing the various signal parameter value of said adjuster.
8. according to the said adjuster of claim 7, it is characterized in that said display unit is that display is or/and light emitting diode lamp.
9. said according to Claim 8 adjuster is characterized in that said display is a LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102091822ACN101673645B (en) | 2009-10-28 | 2009-10-28 | Automatic regulator for rated protection current of circuit breakers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102091822ACN101673645B (en) | 2009-10-28 | 2009-10-28 | Automatic regulator for rated protection current of circuit breakers |
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| Publication Number | Publication Date |
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| CN101673645A CN101673645A (en) | 2010-03-17 |
| CN101673645Btrue CN101673645B (en) | 2012-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102091822AExpired - Fee RelatedCN101673645B (en) | 2009-10-28 | 2009-10-28 | Automatic regulator for rated protection current of circuit breakers |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111160541B (en)* | 2017-12-14 | 2023-05-19 | 中科寒武纪科技股份有限公司 | Integrated circuit chip device and related products |
| CN112436476B (en)* | 2020-11-06 | 2022-07-01 | 江苏其厚智能电气设备有限公司 | Intelligent circuit breaker self-adaptive protection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6490141B2 (en)* | 1999-05-28 | 2002-12-03 | Ellenberger & Poensgen Gmbh | Power distribution system |
| CN2636472Y (en)* | 2003-06-27 | 2004-08-25 | 李乾良 | Electron type rated current adjustable protector |
| CN101521357A (en)* | 2007-11-21 | 2009-09-02 | 松下电工电路系统株式会社 | Distribution board |
- 2009
- 2009-10-28CNCN2009102091822Apatent/CN101673645B/ennot_activeExpired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6490141B2 (en)* | 1999-05-28 | 2002-12-03 | Ellenberger & Poensgen Gmbh | Power distribution system |
| CN2636472Y (en)* | 2003-06-27 | 2004-08-25 | 李乾良 | Electron type rated current adjustable protector |
| CN101521357A (en)* | 2007-11-21 | 2009-09-02 | 松下电工电路系统株式会社 | Distribution board |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平10-75525A 1998.03.17 |
| JP特开平10-94159A 1998.04.10 |
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| CN101673645A (en) | 2010-03-17 |
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