CN104092183B - A kind of recovery formula overvoltage-undervoltage protector automatically - Google Patents
A kind of recovery formula overvoltage-undervoltage protector automatically Download PDFInfo
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- CN104092183B CN104092183B CN201410340957.0A CN201410340957A CN104092183B CN 104092183 B CN104092183 B CN 104092183B CN 201410340957 A CN201410340957 A CN 201410340957A CN 104092183 B CN104092183 B CN 104092183B
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Abstract
The present invention relates to a kind of recovery formula overvoltage-undervoltage protector automatically.It includes microprocessor.Described microprocessor is connected to voltage sampling circuit by wire, system power supply processes circuit and display circuit；Described system power supply processes circuit has magnetic to keep sub-switch circuit by wire connection.Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire.Described display circuit includes display lamp and display.Described voltage sampling circuit is processed circuit with system power supply and is all connected with main line by wire.When using the circuit generation overvoltage/undervoltage fault of this overvoltage-undervoltage protector, maintenance process is simple, and the range of this overvoltage-undervoltage protector is relatively wide, protection precision is higher.
Description
Technical field
The present invention relates to a kind of low-voltage distribution equipment, the recovery formula overvoltage-undervoltage protector automatically that specifically can automatically disconnect, can automatically close when line voltage distribution recovers normal when distribution line failure causes overvoltage or under-voltage.
Background technology
Both know about in electric utility, the low-voltage distributing line of domestic and similar applications all can be provided with overvoltage/undervoltage protection device.
At present, overvoltage/undervoltage protection device distribution line installed is typically automatically to recover formula overvoltage-undervoltage protector or analog circuit.When using traditional formula overvoltage-undervoltage protector of recovery automatically that distribution line carries out overvoltage/undervoltage protection; when after line failure; point out by opening display lamp; the numerical value of current voltage in distribution line cannot be shown; so maintainer cannot be by the type of the direct failure judgement of voltage value; needing to learn after repeatedly test, maintenance process is cumbersome.When using analog circuit that distribution line carries out overvoltage/undervoltage protection; owing to the precision of analog protection circuit is relevant with the kind of the electronic devices and components manufacturing it; the electronic devices and components being once used for manufacturing analog circuit determine; the protection precision of analog circuit also determines that; so analog circuit can only use on corresponding distribution line; and when distribution line needs to change protection precision due to the change of practical situation; analog circuit cannot be accomplished; so that the range of analog circuit is 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 recovery formula overvoltage-undervoltage protector automatically, and when using the circuit generation overvoltage/undervoltage fault of this overvoltage-undervoltage protector, maintenance process is simple, and the range of this overvoltage-undervoltage protector is relatively wide, protection precision is higher.
For solving the problems referred to above, it is provided that techniques below scheme:
Automatically the feature recovering formula overvoltage-undervoltage protector of the present invention is to include microprocessor.Described microprocessor is connected to voltage sampling circuit by wire, system power supply processes circuit and display circuit；Described system power supply processes circuit has magnetic to keep sub-switch circuit by wire connection.Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire.Described display circuit includes display lamp and display.Described voltage sampling circuit is processed circuit with system power supply and is all connected with main line by wire.Described voltage sampling circuit is for detecting the voltage of main line, and the voltage signal detected is converted into the signal of telecommunication passes to microprocessor.Described system power supply processes circuit for the electric energy voltage that main line provides is converted into microprocessor and the voltage available of magnetic holding sub-switch circuit.Described microprocessor is used for controlling magnetic and keeps sub-switch circuit to carry out closing a floodgate or separating brake, controls display circuit simultaneously and shows corresponding state.When voltage sampling circuit detects the voltage signal values upper limit more than the pre-set threshold value of microprocessor of main line or the lower limit less than pre-set threshold value, microprocessor controls magnetic and keeps sub-switch circuit to carry out separating brake, and control the display lamp unlatching on display circuit, the current voltage value of display display simultaneously.When the voltage signal values of the main line that voltage sampling circuit detects is in the range of the pre-set threshold value of microprocessor, microprocessor controls magnetic and keeps sub-switch circuit to close a floodgate, and controls display lamp closedown on display circuit, the current voltage value of display display simultaneously.
It is to connect on the outfan of described main line to have lightning protection circuit to further improvement of the present invention scheme.Described lightning protection circuit includes input and outfan, and the input of lightning protection circuit is connected with main line by wire, and the outfan of lightning protection circuit processes circuit with voltage sampling circuit and system power supply respectively by wire and is connected.Input at lightning protection circuit absorbs varistor, high pressure ceramic disc capacitor and output voltage surge protection varistor to being parallel with thunderbolt between that section of electrode line and negative line of outfan successively.CBB electric capacity and power resistor have been sequentially connected in series it on that section of electrode line between high pressure ceramic disc capacitor to output voltage surge protection varistor；The two ends of described CBB electric capacity are parallel with discharge resistance.nullThe advantage so improved is when main line is caused main line to produce instantaneous high pressure by thunderbolt interference，Instantaneous high pressure enters into lightning protection circuit through the input of the circuit of lightning protection，Thunderbolt in parallel between lightning protection circuit electrode line and negative line absorbs varistor can inhale the unwanted currents 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，Instantaneous voltage is absorbed by the CBB electric capacity on electrode line，And normal voltage is passed to rear class，With the power resistor of CBB capacitances in series, CBB electric capacity is protected，CBB electric capacity is discharged by the discharge resistance in parallel with CBB electric capacity，Output voltage surge protection varistor guarantees that the output voltage of lightning protection circuit is normal voltage，So that this recovers formula overvoltage-undervoltage protector automatically preferable lightning protection effect.
It is that described magnetic keeps sub-switch circuit to include power interface, the first audion, the second audion, the 3rd audion, the 4th audion and magnetic latching relay to further improvement of the present invention scheme.Described power interface processes circuit by wire with described system power supply and is connected, power interface connects one end of the first resistance by wire, the other end of the first resistance connects one end of the second resistance by wire, and the other end of the second resistance is extremely connected with the C of described first audion by wire.The B pole of described first audion connects one end of the 3rd resistance by wire, and the other end of the 3rd resistance is connected with described microprocessor, and the B pole of the first audion and E interpolar are parallel with the first electric capacity.Described power interface connects one end of the 4th resistance by wire, and the other end of the 4th resistance connects one end of the 5th resistance by wire, and the other end of the 5th resistance is extremely connected with the C of described 4th audion by wire.The B pole of described 4th audion connects one end of the 6th resistance by wire, and the other end of the 6th resistance is connected with described microprocessor by wire.E pole and the B interpolar of described 4th audion are parallel with the second electric capacity.The B pole of described second audion and E pole are connected in parallel on the two ends of described first resistance, and the E pole of the second audion is positioned on that one end that the first resistance is connected with power interface, and the C pole of the second audion is extremely connected with the C of described 4th audion by wire.The B pole of described 3rd audion and E pole are connected in parallel on the two ends of described 4th resistance, and the E pole of the 3rd audion is positioned on that one end that the 4th resistance is connected with power interface, and the C pole of the 3rd audion is extremely connected with the C of described first audion by wire.The C that the two ends of described magnetic latching relay pass through wire and the C pole of the first audion and the 4th audion respectively is the most connected.The E pole of described first audion and the E of the 4th audion extremely all ground connection.The operation principle of this magnetic holding sub-switch circuit is, when micro-processing controls magnetic keeps sub-switch circuit to carry out separating brake, first triode ON, under the inductance effect of magnetic latching relay, ensure that the C pole of the second resistance and the first audion produces certain voltage (voltage is about 0.7V), now form dividing potential drop due to the first resistance and the second resistance, ensure that the B pole of the second audion produces the voltage less than E pole, make the second triode ON, magnetic latching relay is caused to be energized, and the sense of current from the C of magnetic latching relay and the 4th audion extremely be connected that one end to the C of magnetic latching relay and the one or three grade of end be extremely connected that one end flowing, magnetic keeps sub-switch circuit with regard to separating brake.When microprocessor control magnetic keeps sub-switch circuit to close a floodgate, 4th triode ON, under the inductance effect of magnetic latching relay, ensure that the C pole of the 5th resistance and the 4th audion produces certain voltage (voltage is about 0.7V), now form dividing potential drop due to the 4th resistance and the 5th resistance, ensure that the B pole of the 3rd audion produces the voltage less than E pole, make the 3rd triode ON, magnetic latching relay is caused to be energized, and the sense of current is extremely connected the flowing of that one end from that one end that magnetic latching relay and the first audion C are extremely connected to magnetic latching relay and the 4th audion C, magnetic keeps sub-switch circuit just to close a floodgate.The advantage so improved is to use unicoil magnetic latching relay, monocoil for magnetic latching relay two ends are extremely connected with the C of the 4th audion with the C pole of the first audion respectively, but the twice at unicoil pattern lower coil impedance twin coil, on the basis of producing same electromagnetic force, less electric current is needed when identical voltage, therefore less to the power requirement of power supply, the least to the power requirement of four audions, when normal work, coil need not power supply simultaneously so that power consumption is zero.
It is that described microprocessor has motor divide-shut brake start-up circuit by wire connection to further improvement of the present invention scheme；Described motor divide-shut brake start-up circuit is connected with lightning protection circuit by wire.The advantage so improved is that microprocessor can select control magnetic to keep sub-switch circuit to carry out divide-shut brake according to practical situation or motor divide-shut brake start-up circuit carries out divide-shut brake.
It is that described microprocessor has telecommunication circuit by wire connection to further improvement of the present invention scheme.The advantage so improved is that other electric equipments on main line are communicatively coupled by available telecommunication circuit, realize the Remote to other electric equipments and real time data inspecting function, also data exchange can be formed with other electric equipments, it is achieved the restriction of intelligent power.
Further improvement project to the present invention is that described microprocessor is connected to current sampling circuit and residual current sample circuit by wire.The advantage so improved is can be detected electric current in circuit and residual current by current sampling circuit and residual current sample circuit, and the current signal of detection is converted into the signal of telecommunication passes to microprocessor, microprocessor controls the display of display circuit and shows corresponding current values, so that testing staff can directly learn the numerical value of electric current.
Take above scheme, have the advantage that
Owing to the formula overvoltage-undervoltage protector that automatically recovers of the present invention includes microprocessor；Described microprocessor is connected to voltage sampling circuit by wire, system power supply processes circuit and display circuit；Described system power supply processes circuit has magnetic to keep sub-switch circuit by wire connection；Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire；Described display circuit includes display lamp and display；Described voltage sampling circuit is processed circuit with system power supply and is all connected with main line by wire.During use; the situation of the distribution line protected as required arranges the pre-set threshold value of microprocessor; main line is connected with needing distribution line to be protected; voltage sampling circuit starts to detect the voltage of main line and the voltage signal detected is converted into the signal of telecommunication to pass to microprocessor; when the magnitude of voltage that voltage collection circuit detects is more than or less than the pre-set threshold value of microprocessor; microprocessor controls magnetic and keeps sub-switch circuit to carry out separating brake; and control the display lamp unlatching on display circuit, the current voltage value of display display simultaneously；When the signal value of the main line voltage that voltage collection circuit detects is in the range of the pre-set threshold value of microprocessor, microprocessor controls magnetic and keeps sub-switch circuit to close a floodgate, and controls display lamp closedown on display circuit, the current voltage value of display display simultaneously.So when this distribution line generation overvoltage/undervoltage fault, maintainer can recognize current magnitude of voltage accurately by display, and maintainer can directly know the type of fault according to magnitude of voltage, avoids the need for through repeatedly testing, and maintenance process becomes simpler.Simultaneously; this recovers formula overvoltage-undervoltage protector automatically can adjust the pre-set threshold value of microprocessor according to the type of distribution line; range is relatively wide, and this automatically recovers formula overvoltage-undervoltage protector and can select different voltage-vs-time tripping operation curves according to the practical situation of current line, and protection precision is higher.
Accompanying drawing explanation
Fig. 1 is the structure principle chart automatically recovering formula overvoltage-undervoltage protector of the present invention；
Fig. 2 is that the automatic of the present invention recovers the circuit diagram of lightning protection circuit in formula overvoltage-undervoltage protector；
Fig. 3 is that the magnetic in formula overvoltage-undervoltage protector that automatically recovers of the present invention keeps the circuit diagram of sub-switch circuit；
Fig. 4 is that the magnetic in formula overvoltage-undervoltage protector that automatically recovers of the present invention keeps the gate-dividing state sense of current schematic diagram of sub-switch circuit；
Fig. 5 is that the magnetic in formula overvoltage-undervoltage protector that automatically recovers of the present invention keeps the "on" position sense of current schematic diagram of sub-switch circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing, the formula overvoltage-undervoltage protector that automatically recovers of the present invention is described in further detail.
Automatically the formula overvoltage-undervoltage protector that recovers of the present invention includes microprocessor as shown in Figure 1.Described microprocessor is connected to voltage sampling circuit by wire, system power supply processes circuit, display circuit, motor divide-shut brake start-up circuit, telecommunication circuit, current sampling circuit and residual current sample circuit.Described system power supply processes circuit has magnetic to keep sub-switch circuit by wire connection.Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire.Described display circuit includes display lamp and display.Described motor divide-shut brake start-up circuit is connected by wire lightning protection circuit.Described voltage sampling circuit, system power supply are processed circuit and keep sub-switch circuit to be all connected with lightning protection circuit by wire with magnetic.Described lightning protection circuit is connected with main line by wire.
As shown in Figure 2; automatically the lightning protection circuit recovered in formula overvoltage-undervoltage protector of the present invention includes input Ui and outfan Uo; the input Ui of lightning protection circuit is connected with main line by wire, and the outfan Uo of lightning protection circuit processes circuit with voltage sampling circuit and system power supply respectively by wire and is connected.Between that section of electrode line of input Ui to outfan Uo and negative line of lightning protection circuit, it is parallel with thunderbolt successively absorbs varistor R1, high pressure ceramic disc capacitor C1 and output voltage surge protection varistor R4.It has been sequentially connected in series CBB electric capacity C2 and power resistor R3 on that section of electrode line between high pressure ceramic disc capacitor C1 to output voltage surge protection varistor R4.The two ends of described CBB electric capacity C2 are parallel with discharge resistance R2.
As it is shown on figure 3, the magnetic automatically recovered in formula overvoltage-undervoltage protector of the present invention keeps sub-switch circuit to include power interface, the first audion Q1, the second audion Q2, the 3rd audion Q3, the 4th audion Q4 and magnetic latching relay.Described power interface processes circuit by wire with described system power supply and is connected, power interface connects one end of the first resistance R11 by wire, the other end of the first resistance R11 connects one end of the second resistance R12 by wire, and the other end of the second resistance R12 is extremely connected with the C of described first audion Q1 by wire.The B pole of described first audion Q1 connects one end of the 3rd resistance R13 by wire, and the other end of the 3rd resistance R13 is connected with described microprocessor, and the B pole of the first audion and E interpolar are parallel with the first electric capacity C21.Described power interface connects one end of the 4th resistance R14 by wire, and the other end of the 4th resistance R14 connects one end of the 5th resistance R15 by wire, and the other end of the 5th resistance R15 is extremely connected with the C of described 4th audion Q4 by wire.The B pole of described 4th audion Q4 connects one end of the 6th resistance R16 by wire, and the other end of the 6th resistance R16 is connected with described microprocessor by wire.E pole and the B interpolar of described 4th audion Q4 are parallel with the second electric capacity C22.The B pole of described second audion Q2 and E pole are connected in parallel on the two ends of described first resistance R11, the E pole of the second audion Q2 is positioned on that one end that the first resistance R11 is connected with power interface, and the C pole of the second audion Q2 is extremely connected with the C of described 4th audion Q4 by wire；The B pole of described 3rd audion and E pole are connected in parallel on the two ends of described 4th resistance R14, and the E pole of the 3rd audion is positioned on that one end that the 4th resistance R14 is connected with power interface, and the C pole of the 3rd audion Q3 is extremely connected with the C of described first audion by wire；The C that the two ends of described magnetic latching relay pass through wire and the C pole of the first audion Q1 and the 4th audion respectively is the most connected；The E pole of described first audion Q1 and the E of the 4th audion extremely all ground connection.
During use, the pre-set threshold value of microprocessor is set.When voltage sampling circuit detects the voltage signal values upper limit more than the pre-set threshold value of microprocessor of main line or the lower limit less than pre-set threshold value, microprocessor controls magnetic and keeps sub-switch circuit to carry out separating brake, at this moment, magnetic keeps the sense of current in sub-switch circuit, and as shown in Figure 4, magnetic keeps the magnetic latching relay separating brake in sub-switch circuit.When the voltage signal values that voltage sampling circuit detects is in the range of the pre-set threshold value of microprocessor, microprocessor controls magnetic and keeps sub-switch circuit to close a floodgate, at this moment, the sense of current during magnetic keeps sub-switch circuit is as it is shown in figure 5, magnetic keeps the magnetic latching relay in sub-switch circuit to close a floodgate.The most just complete the overvoltage/undervoltage protection of main line.
Claims (5)
1. an automatic recovery formula overvoltage-undervoltage protector, it is characterised in that include microprocessor；Described microprocessor is connected to voltage sampling circuit by wire, system power supply processes circuit and display circuit；Described system power supply processes circuit has magnetic to keep sub-switch circuit by wire connection；Described magnetic keeps sub-switch circuit to be connected with described microprocessor by wire；Described display circuit includes display lamp and display；Described voltage sampling circuit is processed circuit with system power supply and is all connected with main line by wire；
Described magnetic keeps sub-switch circuit to include power interface, the first audion (Q1), the second audion (Q2), the 3rd audion (Q3), the 4th audion (Q4) and magnetic latching relay；Described power interface processes circuit by wire with described system power supply and is connected, power interface connects one end of the first resistance (R11) by wire, the other end of the first resistance (R11) connects one end of the second resistance (R12) by wire, and the other end of the second resistance (R12) is extremely connected with the C of described first audion (Q1) by wire；The B pole of described first audion (Q1) connects one end of the 3rd resistance (R13) by wire, and the other end of the 3rd resistance (R13) is connected with described microprocessor, and the B pole of the first audion and E interpolar are parallel with the first electric capacity (C21)；Described power interface connects one end of the 4th resistance (R14) by wire, the other end of the 4th resistance (R14) connects one end of the 5th resistance (R15) by wire, and the other end of the 5th resistance (R15) is extremely connected with the C of described 4th audion (Q4) by wire；The B pole of described 4th audion (Q4) connects the 6th resistance (R16) by wire, and the other end of the 6th resistance (R16) is connected with described microprocessor by wire；E pole and the B interpolar of described 4th audion (Q4) are parallel with the second electric capacity (C22)；The B pole of described second audion (Q2) and E pole are connected in parallel on the two ends of described first resistance (R11), the E pole of the second audion (Q2) is positioned on that one end that the first resistance (R11) is connected with power interface, and the C pole of the second audion (Q2) is extremely connected with the C of described 4th audion (Q4) by wire；The B pole of described 3rd audion and E pole are connected in parallel on the two ends of described 4th resistance (R14), the E pole of the 3rd audion is positioned on that one end that the 4th resistance (R14) is connected with power interface, and the C pole of the 3rd audion (Q3) is extremely connected with the C of described first audion by wire；The C that the two ends of described magnetic latching relay pass through wire and the C pole of the first audion (Q1) and the 4th audion respectively is the most connected；The E pole of described first audion (Q1) and the E of the 4th audion extremely all ground connection；
Described voltage sampling circuit is for detecting the voltage of main line, and the voltage signal detected is converted into the signal of telecommunication passes to microprocessor；
Described system power supply processes circuit for the electric energy voltage that main line provides is converted into microprocessor and the voltage available of magnetic holding sub-switch circuit；
Described microprocessor is used for controlling magnetic and keeps sub-switch circuit to carry out closing a floodgate or separating brake, controls display circuit simultaneously and shows corresponding state；When voltage sampling circuit detects the voltage signal values upper limit more than the pre-set threshold value of microprocessor of main line or the lower limit less than pre-set threshold value, microprocessor controls magnetic and keeps sub-switch circuit to carry out separating brake, and control the display lamp unlatching on display circuit, the current voltage value of display display simultaneously；When the voltage signal values of the main line that voltage sampling circuit detects is in the range of the pre-set threshold value of microprocessor, microprocessor controls magnetic and keeps sub-switch circuit to close a floodgate, and controls display lamp closedown on display circuit, the current voltage value of display display simultaneously.
2. recovery formula overvoltage-undervoltage protector automatically as claimed in claim 1, it is characterised in that connect on the outfan of described main line and have lightning protection circuit；Described lightning protection circuit includes input (Ui) and outfan (Uo), and the input (Ui) of lightning protection circuit is connected with main line by wire, and the outfan (Uo) of lightning protection circuit processes circuit with voltage sampling circuit and system power supply respectively by wire and is connected；Input (Ui) at lightning protection circuit absorbs varistor (R1), high pressure ceramic disc capacitor (C1) and output voltage surge protection varistor (R4) to being parallel with thunderbolt between that section of electrode line and negative line of outfan (Uo) successively；CBB electric capacity (C2) and power resistor (R3) it has been sequentially connected in series on that section of electrode line between high pressure ceramic disc capacitor (C1) to output voltage surge protection varistor (R4)；The two ends of described CBB electric capacity (C2) are parallel with discharge resistance (R2).
3. recovery formula overvoltage-undervoltage protector automatically as claimed in claim 2, it is characterised in that described microprocessor is connected by wire motor divide-shut brake start-up circuit；Described motor divide-shut brake start-up circuit is connected with lightning protection circuit by wire.
4. recovery formula overvoltage-undervoltage protector automatically as claimed in claim 1, it is characterised in that described microprocessor is connected by wire telecommunication circuit.
5. the recovery formula overvoltage-undervoltage protector automatically as according to any one of claim 1 ~ 4, it is characterised in that described microprocessor is connected to current sampling circuit and residual current sample circuit by wire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410340957.0A CN104092183B (en) | 2014-07-17 | 2014-07-17 | A kind of recovery formula overvoltage-undervoltage protector automatically |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410340957.0A CN104092183B (en) | 2014-07-17 | 2014-07-17 | A kind of recovery formula overvoltage-undervoltage protector automatically |
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| CN104092183B true CN104092183B (en) | 2016-08-24 |
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| 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 |
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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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