CN104092183A - Automatic recovery type overvoltage and undervoltage protector - Google Patents
Automatic recovery type overvoltage and undervoltage protector Download PDFInfo
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- CN104092183A CN104092183A CN201410340957.0A CN201410340957A CN104092183A CN 104092183 A CN104092183 A CN 104092183A CN 201410340957 A CN201410340957 A CN 201410340957A CN 104092183 A CN104092183 A CN 104092183A
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Abstract
The invention relates to an automatic recovery type overvoltage and undervoltage protector which comprises a microprocessor respectively connected with a voltage sampling circuit, a system power processing circuit and a display circuit through leads. The system power processing circuit is connected with a magnetic latching breaking and closing circuit through a lead, and the magnetic latching breaking and closing circuit is connected with the microprocessor through a lead. The display circuit comprises an indication lamp and a displayer. Both the voltage sampling circuit and the system power processing circuit are connected with a main circuit through leads. When overvoltage and undervoltage faults happen to the circuit with the overvoltage and undervoltage protector, the overhauling process is simple. Furthermore, the automatic recovery type overvoltage and undervoltage protector is wide in application range and high in protection accuracy.
Description
Technical field
The present invention relates to a kind of low-voltage distribution equipment, be specifically when distribution line failure causes overvoltage or under voltage, can automatically disconnect, automatic recovery formula overvoltage-undervoltage protector that can be automatically closed when line voltage distribution recovers normal.
Background technology
In electric utility, all know, on the low-voltage distributing line of family expenses and similar applications, all overvoltage/undervoltage protective device can be installed.
At present, the overvoltage/undervoltage protective device of installing on distribution line normally recovers formula overvoltage-undervoltage protector or analog circuit automatically.While adopting traditional automatic recovery formula overvoltage-undervoltage protector to carry out overvoltage/undervoltage protection to distribution line; after line failure; by opening indicator light, point out; the numerical value that cannot show current voltage in distribution line; so maintainer cannot pass through the type of the direct failure judgement of voltage value; need to be through repeatedly learning after test, maintenance process is more loaded down with trivial details.While adopting analog circuit to carry out overvoltage/undervoltage protection to distribution line; because the precision of analog protection circuit is relevant with the kind of its electronic devices and components of manufacture; once the electronic devices and components for the manufacture of analog circuit are determined; the protection precision of analog circuit is also just determined; so analog circuit can only use on corresponding distribution line; and when distribution line need to change protection precision due to the change of actual conditions; analog circuit cannot be accomplished; thereby make the scope of application of analog circuit less, protection precision is poor.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of automatic recovery formula overvoltage-undervoltage protector, and while using the circuit generation overvoltage/undervoltage fault of this overvoltage-undervoltage protector, maintenance process is simple, and the scope of application of this overvoltage-undervoltage protector is wide, protection precision is higher.
For addressing the above problem, provide following technical scheme:
The feature of automatic recovery formula overvoltage-undervoltage protector of the present invention is to comprise microprocessor.Described microprocessor is connected with respectively voltage sampling circuit, system power supply treatment circuit and display circuit by wire; Described system power supply treatment circuit is connected with magnetic by wire and keeps sub-switch circuit.Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire.Described display circuit comprises indicator light and display.Described voltage sampling circuit is all connected with main line by wire with system power supply treatment circuit.Described voltage sampling circuit is for detection of the voltage of main line, and converts the voltage signal detecting to electrical signal transfer to microprocessor.Described system power supply treatment circuit becomes microprocessor and magnetic to keep the voltage available of sub-switch circuit for the electric energy voltage transitions that main line is provided.Described microprocessor is used for controlling magnetic and keeps sub-switch circuit to close a floodgate or separating brake, controls display circuit simultaneously and shows corresponding state.The voltage signal values that main line detected when voltage sampling circuit be greater than microprocessor pre-set threshold value the upper limit or lower than pre-set threshold value lower in limited time, microprocessor is controlled magnetic and is kept sub-switch circuit to carry out separating brake, and control the indicator light unlatching on display circuit, display shows current voltage value simultaneously.When the voltage signal values of the main line that voltage sampling circuit detects is in the scope of the pre-set threshold value of microprocessor, microprocessor is controlled magnetic and is kept sub-switch circuit to close a floodgate, and control indicator light on display circuit and close, display shows current voltage value simultaneously.
To further improvement of the present invention scheme, be to be connected with lightning protection circuit on the output of described main line.Described lightning protection circuit comprises input and output, and the input of lightning protection circuit is connected with main line by wire, and the output of lightning protection circuit is connected with system power supply treatment circuit with voltage sampling circuit respectively by wire.At the input of lightning protection circuit, to being parallel with successively thunderbolt between that section of electrode line of output and negative line, absorb piezo-resistance, high pressure ceramic disc capacitor and output voltage surge protection piezo-resistance.At high pressure ceramic disc capacitor, to that section of electrode line between output voltage surge protection piezo-resistance, be in series with successively CBB electric capacity and power resistor; The two ends of described CBB electric capacity are parallel with discharge resistance.Improved like this advantage is to disturb while causing main line to produce instantaneous high pressure when main line is subject to thunderbolt, when the input of the circuit of instantaneous high pressure process lightning protection enters into lightning protection circuit, between lightning protection circuit electrode line and negative line, thunderbolt in parallel absorbs piezo-resistance and can inhale the unnecessary electric current that instantaneous high pressure produces, high pressure ceramic disc capacitor in parallel between lightning protection circuit electrode line and negative line sponges the interference that instantaneous high pressure causes, CBB electric capacity on electrode line absorbs instantaneous voltage, and normal voltage is passed to rear class, with the power resistor of CBB capacitances in series, CBB electric capacity is protected, with the discharge resistance of CBB Capacitance parallel connection, CBB electric capacity is discharged, output voltage surge protection piezo-resistance guarantees that the output voltage of lightning protection circuit is normal voltage, thereby make this automatic recovery formula overvoltage-undervoltage protector have good lightning protection effect.
To further improvement of the present invention scheme, be that described magnetic keeps sub-switch circuit to comprise power interface, the first triode, the second triode, the 3rd triode, the 4th triode and magnetic latching relay.Described power interface is connected with described system power supply treatment circuit by wire, power interface is connected with the first resistance by wire, the other end of the first resistance is connected with the second resistance by wire, and the other end of the second resistance is connected with the C collection of described the first triode by wire.The B collection of described the first triode is connected with the 3rd resistance by wire, and the other end of the 3rd resistance is connected with described microprocessor, between the B collection of the first triode and E collection, is parallel with the first electric capacity.Described power interface is connected with the 4th resistance by wire, and the other end of the 4th resistance is connected with the 5th resistance by wire, and the other end of the 5th resistance is connected with the C collection of described the 4th triode by wire.The B collection of described the 4th triode is connected with the 6th resistance by wire, and the other end of the 6th resistance is connected with described microprocessor by wire.Between the E collection of described the 4th triode and B collection, be parallel with the second electric capacity.The B collection of described the second triode and E collection are connected in parallel on the two ends of described the first resistance, and the E collection of the second triode is positioned on that one end that the first resistance is connected with power interface, and the C collection of the second triode is extremely connected with the C of described the 4th triode by wire.The B collection of described the 3rd triode and E collection are connected in parallel on the two ends of described the 4th resistance, and the E collection of the 3rd triode is positioned on that one end that the 4th resistance is connected with power interface, and the C collection of the 3rd triode is connected with the C collection of described the first triode by wire.The two ends of described magnetic latching relay are connected with the C collection of the 4th triode with the C collection of the first triode by wire respectively.The equal ground connection of E collection of the E collection of described the first triode and the 4th triode.This magnetic keeps the operation principle of sub-switch circuit to be, when micro-processing controls magnetic keeps sub-switch circuit to carry out separating brake, the first triode conducting, the C collection that guarantees the second resistance and the first triode under the inductance effect of magnetic latching relay produces certain voltage (voltage is about 0.7V), now due to the first resistance and the second resistance formation dividing potential drop, thereby the B collection of having guaranteed the second triode produces the voltage lower than E collection, make the second triode conducting, cause magnetic latching relay energising, and flow in that one end that is connected with the C collection of the one or three grade of end to magnetic latching relay, that one end that the sense of current is connected with the C collection of the 4th triode from magnetic latching relay, magnetic keeps sub-switch circuit with regard to separating brake.When microprocessor control magnetic keeps sub-switch circuit to close a floodgate, the 4th triode conducting, the C collection that guarantees the 5th resistance and the 4th triode under the inductance effect of magnetic latching relay produces certain voltage (voltage is about 0.7V), now due to the 4th resistance and the 5th resistance formation dividing potential drop, thereby the B collection of having guaranteed the 3rd triode produces the voltage lower than E collection, make the 3rd triode conducting, cause magnetic latching relay energising, and flow in that one end that is connected with the 4th triode C collection to magnetic latching relay, that one end that the sense of current is connected with the first triode C collection from magnetic latching relay, magnetic keeps sub-switch circuit just to close a floodgate.Improved like this advantage is to use unicoil magnetic latching relay, the monocoil two ends of magnetic latching relay are connected with the C collection of the 4th triode with the C collection of the first triode respectively, but the twice at unicoil pattern lower coil impedance twin coil, producing on the basis of same electromagnetic force, when identical voltage, need less electric current, therefore less to the power requirement of power supply, power requirement to four triodes is also less, when normal work, coil does not need power supply simultaneously, and making power consumption is zero.
To further improvement of the present invention scheme, be that described microprocessor is connected with motor divide-shut brake start-up circuit by wire; Described motor divide-shut brake start-up circuit is connected with lightning protection circuit by wire.Improved like this advantage is that microprocessor can select be controlled magnetic according to actual conditions and keeps sub-switch circuit to carry out divide-shut brake or motor divide-shut brake start-up circuit carries out divide-shut brake.
To further improvement of the present invention scheme, be that described microprocessor is connected with telecommunication circuit by wire.Improved like this advantage is to utilize telecommunication circuit to communicate connection to other electric equipments on main line, realization is to the Remote of other electric equipments and real time data inspecting function, also can form exchanges data with other electric equipments, realize the restriction of intelligent power.
To further improvement project of the present invention, be that described microprocessor is connected with respectively current sampling circuit and residual current sample circuit by wire.Improved like this advantage is to electric current in circuit and residual current, to detect by current sampling circuit and residual current sample circuit, and convert the current signal of detection to electrical signal transfer to microprocessor, the display that microprocessor is controlled display circuit shows corresponding current values, thereby makes testing staff can directly learn the numerical value of electric current.
Take above scheme, have the following advantages:
Because automatic recovery formula overvoltage-undervoltage protector of the present invention comprises microprocessor; Described microprocessor is connected with respectively voltage sampling circuit, system power supply treatment circuit and display circuit by wire; Described system power supply treatment circuit is connected with magnetic by wire and keeps sub-switch circuit; Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire; Described display circuit comprises indicator light and display; Described voltage sampling circuit is all connected with main line by wire with system power supply treatment circuit.During use, the situation of the distribution line of protection arranges the pre-set threshold value of microprocessor as required, main line is connected with the distribution line needing protection, voltage sampling circuit starts to detect the voltage of main line and converts the voltage signal detecting to electrical signal transfer to microprocessor, when the magnitude of voltage detecting when voltage collection circuit is greater than or less than the pre-set threshold value of microprocessor, microprocessor is controlled magnetic and is kept sub-switch circuit to carry out separating brake, and control the indicator light unlatching on display circuit, display shows current voltage value simultaneously; When the signal value of the main line voltage that voltage collection circuit detects is in the scope of the pre-set threshold value of microprocessor, microprocessor is controlled magnetic and is kept sub-switch circuit to close a floodgate, and control indicator light on display circuit and close, display shows current voltage value simultaneously.So when this distribution line generation overvoltage/undervoltage fault, maintainer can recognize current magnitude of voltage accurately by display, maintainer can directly know the type of fault according to magnitude of voltage, does not just need through repeatedly test, and it is simpler that maintenance process becomes.Simultaneously; this automatic recovery formula overvoltage-undervoltage protector can be adjusted according to the type of distribution line the pre-set threshold value of microprocessor; the scope of application is wider; and this automatic recovery formula overvoltage-undervoltage protector can be selected different voltage-time tripping operation curve according to the actual conditions of current circuit, and protection precision is higher.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of automatic recovery formula overvoltage-undervoltage protector of the present invention;
Fig. 2 is the circuit diagram of lightning protection circuit in automatic recovery formula overvoltage-undervoltage protector of the present invention;
Fig. 3 is the circuit diagram that in automatic recovery formula overvoltage-undervoltage protector of the present invention, magnetic keeps sub-switch circuit;
Fig. 4 is the gate-dividing state sense of current schematic diagram that in automatic recovery formula overvoltage-undervoltage protector of the present invention, magnetic keeps sub-switch circuit;
Fig. 5 is the "on" position sense of current schematic diagram that in automatic recovery formula overvoltage-undervoltage protector of the present invention, magnetic keeps sub-switch circuit.
Embodiment
Below in conjunction with accompanying drawing, automatic recovery formula overvoltage-undervoltage protector of the present invention is described in further detail.
Automatic recovery formula overvoltage-undervoltage protector of the present invention comprises microprocessor as shown in Figure 1.Described microprocessor is connected with respectively voltage sampling circuit, system power supply treatment circuit, display circuit, motor divide-shut brake start-up circuit, telecommunication circuit, current sampling circuit and residual current sample circuit by wire.Described system power supply treatment circuit is connected with magnetic by wire and keeps sub-switch circuit.Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire.Described display circuit comprises indicator light and display.Described motor divide-shut brake start-up circuit is connected with lightning protection circuit by wire.Described voltage sampling circuit, system power supply treatment circuit and magnetic keep sub-switch circuit all by wire, to be connected with lightning protection circuit.Described lightning protection circuit is connected with main line by wire.
As shown in Figure 2; lightning protection circuit in automatic recovery formula overvoltage-undervoltage protector of the present invention comprises input Ui and output Uo; the input Ui of lightning protection circuit is connected with main line by wire, and the output Uo of lightning protection circuit is connected with system power supply treatment circuit with voltage sampling circuit respectively by wire.At the input Ui of lightning protection circuit, to being parallel with successively thunderbolt between that section of electrode line of output Uo and negative line, absorb pressure-sensitive resistance R 1, high pressure ceramic disc capacitor C1 and output voltage surge protection piezo-resistance R4.At high pressure ceramic disc capacitor C1, to that section of electrode line between output voltage surge protection piezo-resistance R4, be in series with successively CBB capacitor C 2 and power resistor R3.The two ends of described CBB capacitor C 2 are parallel with discharge resistance R2.
As shown in Figure 3, the magnetic in automatic recovery formula overvoltage-undervoltage protector of the present invention keeps sub-switch circuit to comprise power interface, the first triode Q1, the second triode Q2, the 3rd triode Q3, the 4th triode Q4 and magnetic latching relay.Described power interface is connected with described system power supply treatment circuit by wire, power interface is connected with the first resistance R 11 by wire, the other end of the first resistance R 11 is connected with the second resistance R 12, the second resistance R 12 other end by wire is connected with the C collection of described the first triode Q1 by wire.The B collection of described the first triode Q1 is connected with the 3rd resistance R 13, the three resistance R 13 other end by wire is connected with described microprocessor, is parallel with the first capacitor C 21 between the B collection of the first triode and E collection.Described power interface is connected with the 4th resistance R 14, the four resistance R 14 other end by wire is connected with the 5th resistance R 15, the five resistance R 15 other end by wire is connected with the C collection of described the 4th triode Q4 by wire.The B collection of described the 4th triode Q4 is connected with the 6th resistance R 16, the six resistance R 16 other end by wire is connected with described microprocessor by wire.Between the E collection of described the 4th triode Q4 and B collection, be parallel with the second capacitor C 22.The B collection of described the second triode Q2 and E collection are connected in parallel on the two ends of described the first resistance R 11, the E collection of the second triode Q2 is positioned on that one end that the first resistance R 11 is connected with power interface, and the C collection of the second triode Q2 is extremely connected with the C of described the 4th triode Q4 by wire; The B collection of described the 3rd triode and E collection are connected in parallel on the two ends of described the 4th resistance R 14, and the E collection of the 3rd triode is positioned on that one end that the 4th resistance R 14 is connected with power interface, and the C collection of the 3rd triode Q3 is connected with the C collection of described the first triode by wire; The two ends of described magnetic latching relay are connected with the C collection of the 4th triode with the C collection of the first triode Q1 by wire respectively; The equal ground connection of E collection of the E collection of described the first triode Q1 and the 4th triode.
During use, the pre-set threshold value of microprocessor is set.The voltage signal values that main line detected when voltage sampling circuit be greater than microprocessor pre-set threshold value the upper limit or lower than pre-set threshold value lower in limited time, microprocessor is controlled magnetic and is kept sub-switch circuit to carry out separating brake, at this moment, in magnetic maintenance sub-switch circuit, as shown in Figure 4, magnetic keeps the magnetic latching relay separating brake in sub-switch circuit to the sense of current.When voltage signal values that voltage sampling circuit detects is in the scope of the pre-set threshold value of microprocessor, microprocessor is controlled magnetic and is kept sub-switch circuit to close a floodgate, at this moment, magnetic keeps in sub-switch circuit the sense of current as shown in Figure 5, magnetic keeps the magnetic latching relay in sub-switch circuit to close a floodgate.Just completed and so forth the overvoltage/undervoltage protection of main line.
Claims (6)
1. an automatic recovery formula overvoltage-undervoltage protector, is characterized in that comprising microprocessor; Described microprocessor is connected with respectively voltage sampling circuit, system power supply treatment circuit and display circuit by wire; Described system power supply treatment circuit is connected with magnetic by wire and keeps sub-switch circuit; Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire; Described display circuit comprises indicator light and display; Described voltage sampling circuit is all connected with main line by wire with system power supply treatment circuit;
Described voltage sampling circuit is for detection of the voltage of main line, and converts the voltage signal detecting to electrical signal transfer to microprocessor;
Described system power supply treatment circuit becomes microprocessor and magnetic to keep the voltage available of sub-switch circuit for the electric energy voltage transitions that main line is provided;
Described microprocessor is used for controlling magnetic and keeps sub-switch circuit to close a floodgate or separating brake, controls display circuit simultaneously and shows corresponding state; The voltage signal values that main line detected when voltage sampling circuit be greater than microprocessor pre-set threshold value the upper limit or lower than pre-set threshold value lower in limited time, microprocessor is controlled magnetic and is kept sub-switch circuit to carry out separating brake, and control the indicator light unlatching on display circuit, display shows current voltage value simultaneously; When the voltage signal values of the main line that voltage sampling circuit detects is in the scope of the pre-set threshold value of microprocessor, microprocessor is controlled magnetic and is kept sub-switch circuit to close a floodgate, and control indicator light on display circuit and close, display shows current voltage value simultaneously.
2. automatic recovery formula overvoltage-undervoltage protector as claimed in claim 1, is characterized in that being connected with lightning protection circuit on the output of described main line; Described lightning protection circuit comprises input (Ui) and output (Uo), and the input of lightning protection circuit (Ui) is connected with main line by wire, and the output of lightning protection circuit (Uo) is connected with system power supply treatment circuit with voltage sampling circuit respectively by wire; At the input (Ui) of lightning protection circuit, to being parallel with successively thunderbolt between that section of electrode line of output (Uo) and negative line, absorb piezo-resistance (R1), high pressure ceramic disc capacitor (C1) and output voltage surge protection piezo-resistance (R4); At high pressure ceramic disc capacitor (C1), to that section of electrode line between output voltage surge protection piezo-resistance (R4), be in series with successively CBB electric capacity (C2) and power resistor (R3); The two ends of described CBB electric capacity (C2) are parallel with discharge resistance (R2).
3. automatic recovery formula overvoltage-undervoltage protector as claimed in claim 1, is characterized in that described magnetic keeps sub-switch circuit to comprise power interface, the first triode (Q1), the second triode (Q2), the 3rd triode (Q3), the 4th triode (Q4) and magnetic latching relay; Described power interface is connected with described system power supply treatment circuit by wire, power interface is connected with the first resistance (R11) by wire, the other end of the first resistance (R11) is connected with the second resistance (R12) by wire, and the other end of the second resistance (R12) is connected with the C collection of described the first triode (Q1) by wire; The B collection of described the first triode (Q1) is connected with the 3rd resistance (R13) by wire, and the other end of the 3rd resistance (R13) is connected with described microprocessor, is parallel with the first electric capacity (C21) between the B collection of the first triode and E collection; Described power interface is connected with the 4th resistance (R14) by wire, and the other end of the 4th resistance (R14) is connected with the 5th resistance (R15) by wire, and the other end of the 5th resistance (R15) is connected with the C collection of described the 4th triode (Q4) by wire; The B collection of described the 4th triode (Q4) is connected with the 6th resistance (R16) by wire, and the other end of the 6th resistance (R16) is connected with described microprocessor by wire; Between the E collection of described the 4th triode (Q4) and B collection, be parallel with the second electric capacity (C22); The B collection of described the second triode (Q2) and E collection are connected in parallel on the two ends of described the first resistance (R11), the E collection of the second triode (Q2) is positioned on that one end that the first resistance (R11) is connected with power interface, and the C collection of the second triode (Q2) is extremely connected with the C of described the 4th triode (Q4) by wire; The B collection of described the 3rd triode and E collection are connected in parallel on the two ends of described the 4th resistance (R14), the E collection of the 3rd triode is positioned on that one end that the 4th resistance (R14) is connected with power interface, and the C collection of the 3rd triode (Q3) is connected with the C collection of described the first triode by wire; The two ends of described magnetic latching relay are connected with the C collection of the 4th triode with the C collection of the first triode (Q1) by wire respectively; The equal ground connection of E collection of the E collection of described the first triode (Q1) and the 4th triode.
4. automatic recovery formula overvoltage-undervoltage protector as claimed in claim 2, is characterized in that described microprocessor is connected with motor divide-shut brake start-up circuit by wire; Described motor divide-shut brake start-up circuit is connected with lightning protection circuit by wire.
5. automatic recovery formula overvoltage-undervoltage protector as claimed in claim 1, is characterized in that described microprocessor is connected with telecommunication circuit by wire.
6. the automatic recovery formula overvoltage-undervoltage protector as described in any one in claim 1 ~ 5, is characterized in that described microprocessor is connected with respectively current sampling circuit and residual current sample circuit by wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410340957.0A CN104092183B (en) | 2014-07-17 | 2014-07-17 | A kind of recovery formula overvoltage-undervoltage protector automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410340957.0A CN104092183B (en) | 2014-07-17 | 2014-07-17 | A kind of recovery formula overvoltage-undervoltage protector automatically |
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| Publication Number | Publication Date |
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| CN104092183A true CN104092183A (en) | 2014-10-08 |
| CN104092183B CN104092183B (en) | 2016-08-24 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490686U (en) * | 2009-07-11 | 2010-05-26 | 杭州之江开关股份有限公司 | Self-recover overvoltage-undervoltage protector |
| CN102222875A (en) * | 2011-06-14 | 2011-10-19 | 广东志高空调有限公司 | Lightening protection, overcurrent, overvoltage-undervoltage protection circuit and control method |
| CN202840468U (en) * | 2012-05-18 | 2013-03-27 | 厦门尤伯电气有限公司 | Permanent-magnetic overvoltage or under-voltage protector |
| CN203205830U (en) * | 2013-04-23 | 2013-09-18 | 上海良信电器股份有限公司 | Resettable overvoltage and under-voltage protector with leakage protection function |
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Denomination of invention: Automatic recovery type overvoltage and undervoltage protector Effective date of registration: 20180116 Granted publication date: 20160824 Pledgee: Bank of China, Limited by Share Ltd, Wuxi Huishan branch Pledgor: Wuxi Zizo Electrical Co., Ltd. Registration number: 2018320010002 |
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