CN102013660A - Quadrupole overvoltage-undervoltage protection circuit and method - Google Patents
Quadrupole overvoltage-undervoltage protection circuit and method Download PDFInfo
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- CN102013660A CN102013660A CN2010105004689A CN201010500468A CN102013660A CN 102013660 A CN102013660 A CN 102013660A CN 2010105004689 A CN2010105004689 A CN 2010105004689A CN 201010500468 A CN201010500468 A CN 201010500468A CN 102013660 A CN102013660 A CN 102013660A
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Abstract
The invention relates to a quadrupole overvoltage-undervoltage protection circuit for controlling an executive element through an executive circuit. The quadrupole overvoltage-undervoltage protection circuit comprises three-phase voltage sampling circuits, comparison circuits and isolating circuits, wherein the comparison circuits are connected to the output ends of the three-phase voltage sampling circuits; the isolating circuits are connected to the output ends of the comparison circuits; the output ends of the isolating circuits are connected with the executive circuit; the three-phase voltage sampling circuits simultaneously samples three-phase voltage signals, and after each phase voltage signal passes through the respective comparison circuit, a group of overvoltage-undervoltage protection drive signal is output through the corresponding isolating circuit; and the overvoltage-undervoltage protection drive signals drive the executive circuit. The quadrupole overvoltage-undervoltage protection circuit is applied to a quadrupole line electricity leakage and overvoltage-undervoltage protection release; and in addition, the release realizes the electricity leakage and overvoltage-undervoltage protection, the electricity leakage and overvoltage protection, the electricity leakage and undervoltage protection, the overvoltage-undervoltage protection, the overvoltage protection and the undervoltage protection of each phase electricity of a quadrupole power supply and has the advantages of small size, little power consumption, low cost and high reliability.
Description
Technical field
The present invention relates to earth leakage circuit-breaker, relate in particular to a kind of four utmost point over under-voltage protection circuits.
Background technology
Release is joined leakage protection circuit; effect is the vector of the electric current by zero sequence current mutual inductor when circuit has the electric leakage or the person to get an electric shock and is not equal to zero; two sides of instrument transformer secondary coil produce voltage; and amplify through integrated circuit; when reaching setting value;, get an electric shock and the earth leakage protective effect at 0.1 second internal cutting off power supply by leakage tripping device thereby play.
Played in the regulation that the design of 10.8.1 dwelling house (apartment) electric lighting should meet among execution " civil buildings electrical design standard " the JGJ 16-2008 Sub_clause 11 " short circuit, overload and mistake, under voltage protection electrical equipment should be installed in the end of incoming cables of Residential distribution box (dividing box) " on August 1st, 2008.In view of above regulation; the switch of electric leakage band overvoltage/undervoltage protection at present has been a big demand in market; and existing four utmost point products can only be protected electric leakage, to four utmost point power supplys electric leakages and wherein one mutually electricity carry out overvoltage protection or to four utmost point power supplys wherein one mutually electricity carry out overvoltage protection; these products all can't be realized simultaneously each overvoltage/undervoltage that the electric leakage band overvoltage/undervoltage of electricity is protected or each is electric mutually mutually in four utmost point power supplys being protected, and use occasion is restricted to a great extent.
In order to overcome the defective of product on the existing market, the present invention proposes a kind of new technical scheme.
Summary of the invention
The purpose of this invention is to provide a kind of four utmost point over under-voltage protection circuits, be used for realizing simultaneously to each electric leakage and overvoltage/undervoltage protection or each overvoltage/undervoltage protection of electricity mutually of electricity mutually of four utmost point power supplys.
For achieving the above object; the present invention has adopted following technical scheme: a kind of four utmost point over under-voltage protection circuits; be used for by the executive circuit control actuating component; this circuit comprises the three-phase voltage sample circuit; the comparison circuit that is connected with the voltage sample circuit output; the buffer circuit that is connected with the comparison circuit output; this buffer circuit output is connected with executive circuit; the voltage sample circuit three-phase voltage signal of sampling simultaneously; every phase voltage signal through comparison circuit separately after; export one group of overvoltage/undervoltage protection drive signal by buffer circuit separately, this overvoltage/undervoltage protection drive executive circuit.
Preferably, this four utmost points over under-voltage protection circuit further comprises the leakage current sample circuit and the leakage current signal deteching circuit of sampling leakage current signal, and leakage current signal deteching circuit output leakage current protection drive signal is used to drive described executive circuit.
Preferably, be connected with diode or resistance between leakage current signal deteching circuit and the executive circuit.
Preferably, described voltage sample circuit comprises rectification circuit, bleeder circuit and the filter circuit that connects successively.
Preferably, described comparison circuit comprises comparator and the delay circuit of connecting with it.
Preferably, described comparison circuit comprises overvoltage comparison circuit and under-voltage comparison circuit.
Preferably, described executive component is a magnetictrip.
Preferably, described buffer circuit is an optical coupling isolation circuit.
The present invention also comprises a kind of four utmost point overvoltage/undervoltage guard methods, may further comprise the steps:
Step 1, the voltage sample circuit three-phase voltage signal of sampling simultaneously;
Step 2, every phase voltage signal are through behind the comparison circuit, by buffer circuit output overvoltage/undervoltage protection drive signal separately;
Step 3, overvoltage/undervoltage protection drive executive circuit;
Step 4, executive circuit drives executive component.
The present invention is mainly used in the release to four utmost point power supplys leak electricity simultaneously and overvoltage/undervoltage is protected or overvoltage/undervoltage is protected; this release is an integral body; general and low-voltage circuit breaker is used, and realizes every electric mutually electric leakage and overvoltage/undervoltage protection, electric leakage and overvoltage protection, electric leakage and under-voltage protection, overvoltage/undervoltage protection, overvoltage protection, under-voltage protection in four utmost point power supplys.
The electric sub-member plate that four utmost point over under-voltage protection circuits are set is by zero sequence current mutual inductor sample electric leakage signal and each phase voltage of Direct Sampling in four utmost point power supplys, the electric leakage sampled signal is exported one group of earth leakage protective drive signal in the circuit board by shaping, amplification, relatively reach and latch; Each phase voltage sampled signal is in the circuit board by shaping, amplification and comparison; by light-coupled isolation and connect one group of overvoltage/undervoltage of output protection drive signal; this overvoltage/undervoltage protection drive signal and earth leakage protective drive signal by and connect the driving magnetictrip; the action of magnetictrip adhesive pushing executing mechanism; the driving lever synchronization action that is connected with actuator; and then the circuit breaker disjunction of promotion and release splicing, realize protection.
Technical scheme provided by the invention has realized simultaneously the electric leakage and the overvoltage/undervoltage of every electricity mutually in four utmost point power supplys being protected under the prerequisite that does not change volume; bring great cost performance to the client; also complied with the demand of construction standards; otherwise realize same function; with the multistage connection of existing product needed; promptly take very big volume cost of idleness again, this product will be simplified the complexity of terminal distribution system greatly, make it short and sweet on the basis that does not reduce performance.
Description of drawings
Fig. 1 is the present invention's four utmost point over under-voltage protection circuits one embodiment block diagrams.
Fig. 2 is another embodiment block diagrams of the present invention's four utmost point over under-voltage protection circuits.
Fig. 3 is the another embodiment block diagrams of the present invention's four utmost point over under-voltage protection circuits.
Fig. 4 is the present invention's four utmost point over under-voltage protection circuit circuit embodiment block diagrams again.
Fig. 5 is the present invention four utmost point over under-voltage protection circuit figure.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described.
In the assembly that existing release and circuit breaker cooperate; electric sub-member plate (mainly adopting circuit design to realize its various functions) is by zero sequence current mutual inductor sampling leakage current signal and Direct Sampling voltage signal; surpass setting as signal; the wiring board output signal drives the magnetictrip action; it is center of circle action with the axle that the electromagnet action drives driving lever; driving lever promotes to realize protection with the circuit breaker disjunction of release assembly unit; the knob that promotes simultaneously to reset ejects reports to the police, and the test knob is used for simulating electric leakage or the overvoltage/undervoltage signal makes the circuit breaker disjunction.Comprise leakage current sample circuit and the leakage current signal deteching circuit that is connected with leakage current sample circuit output in the zero sequence current mutual inductor sampling loop.
The present invention's four utmost point over under-voltage protection circuits are used for that (this executive circuit is the common practise of this area, does not repeat them here by executive circuit.) control actuating component (such as magnetictrip); this four utmost points over under-voltage protection circuit can comprise the leakage current sample circuit of sampling leakage current signal and the leakage current signal deteching circuit that is connected with leakage current sample circuit output, and this leakage current signal deteching circuit is output as leakage current protection drive signal.Described leakage current sample circuit and leakage current signal deteching circuit are the common practise of this area, do not repeat them here.
This four utmost points over under-voltage protection circuit mainly comprises three-phase voltage sample circuit, the comparison circuit that is connected with the voltage sample circuit output; the buffer circuit that is connected with the comparison circuit output; this buffer circuit output is connected with executive circuit; the three-phase voltage sample circuit is Direct Sampling L1-N, L2-N, L3-N voltage signal simultaneously; every phase voltage signal through comparison circuit separately after; export one group of overvoltage/undervoltage protection drive signal by buffer circuit separately, this overvoltage/undervoltage protection drive signal can and connect the driving executive circuit with the earth leakage protective drive signal.
Please join shown in Figure 1ly,, not repeat them here because leakage current sample circuit and executive circuit are prior art.
The present invention mainly comprises the three-phase voltage sample circuit, and this voltage sample circuit comprises that successively the surge current limliting module that connects, the rectification circuit (direct currentization) that is connected with this surge current limliting module output, the voltage stabilizing that is connected with rectification circuit output end set up the relatively filter circuit that is connected with voltage pressure sampling circuit and voltage pressure sampling circuit output of usefulness reference power supply module of system power supply and overvoltage/undervoltage.Described comparison circuit comprises overvoltage comparison circuit and under-voltage comparison circuit, and described overvoltage comparison circuit output is connected with the overvoltage delay circuit; Described under-voltage comparison circuit output is connected with under-voltage delay circuit.The output of described overvoltage delay circuit and under-voltage delay circuit all is connected with buffer circuit, and this buffer circuit is preferably light-coupled isolation.The output of buffer circuit is connected with executive circuit, by the executive circuit control actuating component.
Be provided with diode between buffer circuit and the executive circuit.Also diode can be set between delay circuit and the buffer circuit.
Fig. 2 is an alternative embodiment of the invention, the leakage current signal deteching circuit that the leakage current sample circuit can be set and be connected with leakage current sample circuit output in this circuit.This circuit is only realized four utmost point overvoltage/undervoltage protections, overvoltage protection, under-voltage protection.
Fig. 3 is an another embodiment of the present invention, and surge current limliting module (resistance R 16, R17) can be set, and in the described comparison circuit reference voltage is set, and can be used for relatively drawing overvoltage signal or under-voltage signal.Can be connected with diode or resistance between leakage current signal deteching circuit and the executive circuit.Also can be connected with diode or resistance between comparison circuit and the executive circuit.
Fig. 4 is an embodiment more of the present invention; a kind of four utmost point over under-voltage protection circuits; be used for by the executive circuit control actuating component; this circuit comprises the three-phase voltage sample circuit; the comparison circuit that is connected with the voltage sample circuit output; the buffer circuit (optical coupling isolation circuit) that is connected with the comparison circuit output; this buffer circuit output is connected with executive circuit; the voltage sample circuit three-phase voltage signal of sampling simultaneously; every phase voltage signal through comparison circuit separately after; export one group of overvoltage/undervoltage protection drive signal by buffer circuit separately, this overvoltage/undervoltage protection drive executive circuit.This four utmost points over under-voltage protection circuit further comprises the leakage current sample circuit and the leakage current signal deteching circuit of sampling leakage current signal, and leakage current signal deteching circuit output leakage current protection drive signal is used to drive described executive circuit.
The present invention is leaked electricity simultaneously to four utmost point power supplys and overvoltage/undervoltage protection or overvoltage/undervoltage protection; to each phase power supply (L1-N; L2-N; L3-N) sampling (rectification; step-down; filtering) after; (sampled signal and reference voltage compare through comparison circuit; judge overvoltage; under-voltage or overvoltage/undervoltage) output overvoltage/undervoltage protection drive signal; each group overvoltage/undervoltage protection drive signal is passed through mode (the light isolation of electrical isolation again; magnetic isolation etc. can be played the measure of electrical isolation) and connect one group of overvoltage/undervoltage drive executive circuit action of output; executive circuit drives executive component (magnetictrip) action, and the action of executive component makes the circuit breaker disjunction by transmission mechanism.
To after each phase power supply (L1-N, L2-N, the L3-N) sampling, the mode by electrical isolation (light isolation, magnetic isolation etc. can be played the measure of electrical isolation) has realized three phase mains is carried out overvoltage/undervoltage, overvoltage, under-voltage protection simultaneously.
As shown in Figure 5, because executive circuit, sampling circuit of electric leakage and leakage current signal deteching circuit are the common practise of this area, no longer this circuit is carried out the labor explanation at this, in the voltage sample circuit among the present invention, L1-N is through R16, pass through rectifier bridge U10 rectification after the R17 current limliting, DC power supply after the rectification is through R23, the dividing potential drop of R24 and R25, signal after the dividing potential drop is through C11, R26, the filtering of C12,3 pin that filtered signal one tunnel process R27 is input to comparator carry out overvoltage and relatively judge, another road signal carries out under-voltage relatively judgement through 6 pin that R29 is input to comparator, back comparator 1 pin output overvoltage drive signal is relatively judged in overvoltage, the overvoltage drive signal is through R30, receive the pin of diode D17 after the delay circuit time-delay that C14 forms, under-voltage drive signal is through R31, receive another pin of diode D17 after the delay circuit time-delay that C15 forms, diode D17 output signal is connected to voltage-stabiliser tube D12 and carries out step-down, be connected to R32 after the step-down, R33, the dividing potential drop filter network of C16, voltage division signal driven MOS pipe D18 action, the conducting of D18 makes 2 pin of optocoupler U6 connect low level, power supply VCC makes optocoupler produce preposition electric current by R34, and the conducting of optocoupler output makes power supply VCC be connected to the end of diode D19.
L2-N is through R35, pass through rectifier bridge U11 rectification after the R36 current limliting, DC power supply after the rectification is through R42, the dividing potential drop of R43 and R44, signal after the dividing potential drop is through C21, R45, the filtering of C22,3 pin that filtered signal one tunnel process R46 is input to comparator carry out overvoltage and relatively judge, another road signal carries out under-voltage relatively judgement through 6 pin that R48 is input to comparator, back comparator 1 pin output overvoltage drive signal is relatively judged in overvoltage, the overvoltage drive signal is through R49, receive the pin of diode D26 after the delay circuit time-delay that C24 forms, under-voltage drive signal is through R50, receive another pin of diode D26 after the delay circuit time-delay that C25 forms, diode D26 output signal is connected to voltage-stabiliser tube D13 and carries out step-down, be connected to R51 after the step-down, R52, the dividing potential drop filter network of C26, voltage division signal driven MOS pipe D27 action, the conducting of D27 makes 2 pin of optocoupler U7 connect low level, power supply VCC makes optocoupler produce preposition electric current by R53, and the conducting of optocoupler output makes power supply VCC be connected to the other end of diode D19.
L3-N is through R54, pass through rectifier bridge U12 rectification after the R55 current limliting, DC power supply after the rectification is through R61, the dividing potential drop of R62 and R63, signal after the dividing potential drop is through C31, R64, the filtering of C32,3 pin that filtered signal one tunnel process R65 is input to comparator carry out overvoltage and relatively judge, another road signal carries out under-voltage relatively judgement through 6 pin that R67 is input to comparator, back comparator 1 pin output overvoltage drive signal is relatively judged in overvoltage, the overvoltage drive signal is through R68, receive the pin of diode D35 after the delay circuit time-delay that C34 forms, under-voltage drive signal is through R69, receive another pin of diode D35 after the delay circuit time-delay that C35 forms, diode D35 output signal is connected to voltage-stabiliser tube D14 and carries out step-down, be connected to R70 after the step-down, R71, the dividing potential drop filter network of C36, voltage division signal driven MOS pipe D36 action, the conducting of D36 makes 2 pin of optocoupler U8 connect low level, power supply VCC makes optocoupler produce preposition electric current by R72, and the conducting of optocoupler output makes power supply VCC be connected to the end of diode D37.
More than three groups of output signals and connect the executive circuit that drives the rear end action of threading off.
Though this patent has illustrated, has described and pointed out its basic novel feature in the mode of the better embodiment of application, but should be appreciated that those skilled in the art delete, replace and change the spirit that does not all deviate from this patent to the form and the details of disclosed this patent.
Claims (10)
1. utmost point over under-voltage protection circuit; be used for by the executive circuit control actuating component; it is characterized in that: this circuit comprises three-phase voltage sample circuit, the comparison circuit that is connected with the voltage sample circuit output; the buffer circuit that is connected with the comparison circuit output; this buffer circuit output is connected with executive circuit; the voltage sample circuit three-phase voltage signal of sampling simultaneously; every phase voltage signal through comparison circuit separately after; export one group of overvoltage/undervoltage protection drive signal by buffer circuit separately, this overvoltage/undervoltage protection drive executive circuit.
2. four utmost point over under-voltage protection circuits as claimed in claim 1; it is characterized in that: this four utmost points over under-voltage protection circuit further comprises the leakage current sample circuit and the leakage current signal deteching circuit of sampling leakage current signal, and leakage current signal deteching circuit output leakage current protection drive signal is used to drive described executive circuit.
3. four utmost point over under-voltage protection circuits as claimed in claim 2 is characterized in that: be connected with diode or resistance between leakage current signal deteching circuit and the executive circuit.
4. four utmost point over under-voltage protection circuits as claimed in claim 1 is characterized in that: described voltage sample circuit comprises rectification circuit, bleeder circuit and the filter circuit that connects successively.
5. four utmost point over under-voltage protection circuits as claimed in claim 1 is characterized in that: described comparison circuit comprises comparator and the delay circuit of connecting with it.
6. four utmost point over under-voltage protection circuits as claimed in claim 1 is characterized in that: described comparison circuit comprises overvoltage comparison circuit and under-voltage comparison circuit.
7. four utmost point over under-voltage protection circuits as claimed in claim 1 is characterized in that: described executive component is a magnetictrip.
8. four utmost point over under-voltage protection circuits as claimed in claim 1 is characterized in that: described buffer circuit is an optical coupling isolation circuit.
9. four utmost point overvoltage/undervoltage guard methods is characterized in that: may further comprise the steps:
Step 1, the voltage sample circuit three-phase voltage signal of sampling simultaneously;
Step 2, every phase voltage signal are through behind the comparison circuit, by buffer circuit output overvoltage/undervoltage protection drive signal separately;
Step 3, overvoltage/undervoltage protection drive executive circuit;
Step 4, executive circuit drives executive component.
10. as four utmost point overvoltage/undervoltage guard methods as described in the claim 9; it is characterized in that: this method further may further comprise the steps: this four utmost points over under-voltage protection circuit further comprises the leakage current sample circuit and the leakage current signal deteching circuit of sampling leakage current signal; the leakage current signal is through shaping, amplification, relatively reach and latch output leakage current protection drive signal, and leakage current protection drive signal is used to drive described executive circuit.
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| CN2010105004689A CN102013660A (en) | 2010-09-30 | 2010-09-30 | Quadrupole overvoltage-undervoltage protection circuit and method |
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| CN2010105004689A CN102013660A (en) | 2010-09-30 | 2010-09-30 | Quadrupole overvoltage-undervoltage protection circuit and method |
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Cited By (10)
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| CN103166176A (en) * | 2011-12-16 | 2013-06-19 | 上海精翊电器有限公司 | Under-voltage protection tripper for low-voltage circuit breaker |
| CN103311884A (en) * | 2013-04-23 | 2013-09-18 | 上海良信电器股份有限公司 | Non-stick overvoltage and under-voltage protector with leakage protection function |
| CN103346548A (en) * | 2013-07-05 | 2013-10-09 | 苏州贝昂科技有限公司 | Discharging monitoring and protecting circuit on high-voltage ion purifier |
| CN104655913A (en) * | 2015-01-29 | 2015-05-27 | 浙江正泰电器股份有限公司 | Low-voltage fault judgment circuit and double power supply changeover switch controller |
| CN105372480A (en) * | 2015-11-17 | 2016-03-02 | 上海控源电子科技有限公司 | Over voltage, under voltage and phase failure detection circuit for charging pile |
| CN105811364A (en) * | 2014-12-31 | 2016-07-27 | 上海良信电器股份有限公司 | Control circuit of circuit breaker under voltage/shunt integration tripping device |
| US9735568B2 (en) | 2013-06-04 | 2017-08-15 | Suzhou Beiang Technology Ltd. | Ionic wind purifier and discharge monitoring and protective circuit of high-voltage ion purifier |
| DE102016116517A1 (en) | 2016-09-05 | 2018-03-08 | Eaton Electrical Ip Gmbh & Co. Kg | Method and device for disconnecting an AC voltage circuit in case of undervoltage |
| CN109342973A (en) * | 2018-11-19 | 2019-02-15 | 中车大连电力牵引研发中心有限公司 | DC supply input status monitoring circuit and system |
| CN109560535A (en) * | 2018-11-09 | 2019-04-02 | 天津航空机电有限公司 | A kind of AC overvoltage fast protection circuit |
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| US9735568B2 (en) | 2013-06-04 | 2017-08-15 | Suzhou Beiang Technology Ltd. | Ionic wind purifier and discharge monitoring and protective circuit of high-voltage ion purifier |
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| CN105811364A (en) * | 2014-12-31 | 2016-07-27 | 上海良信电器股份有限公司 | Control circuit of circuit breaker under voltage/shunt integration tripping device |
| CN104655913A (en) * | 2015-01-29 | 2015-05-27 | 浙江正泰电器股份有限公司 | Low-voltage fault judgment circuit and double power supply changeover switch controller |
| CN105372480A (en) * | 2015-11-17 | 2016-03-02 | 上海控源电子科技有限公司 | Over voltage, under voltage and phase failure detection circuit for charging pile |
| DE102016116517A1 (en) | 2016-09-05 | 2018-03-08 | Eaton Electrical Ip Gmbh & Co. Kg | Method and device for disconnecting an AC voltage circuit in case of undervoltage |
| CN109560535A (en) * | 2018-11-09 | 2019-04-02 | 天津航空机电有限公司 | A kind of AC overvoltage fast protection circuit |
| CN109342973A (en) * | 2018-11-19 | 2019-02-15 | 中车大连电力牵引研发中心有限公司 | DC supply input status monitoring circuit and system |
| CN109342973B (en) * | 2018-11-19 | 2022-01-18 | 中车大连电力牵引研发中心有限公司 | Direct current power supply input state monitoring circuit and system |
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Application publication date: 20110413 |