CN2896638Y - Terminal electrophoresis protector with multiple protection modes - Google Patents
Terminal electrophoresis protector with multiple protection modes Download PDFInfo
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- CN2896638Y CN2896638Y CN 200620039793 CN200620039793U CN2896638Y CN 2896638 Y CN2896638 Y CN 2896638Y CN 200620039793 CN200620039793 CN 200620039793 CN 200620039793 U CN200620039793 U CN 200620039793U CN 2896638 Y CN2896638 Y CN 2896638Y
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- pressure limiting
- limiting element
- disconnector
- resistance
- discharge tube
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Abstract
The model utility discloses a surge protective device and comprises: a first voltage threshold protective component, a first disengaging device, a second voltage threshold protective component, a discharging tube, a current limiting resistor and quick voltage threshold protective components, wherein the first voltage threshold protective component, the first disengaging device and the second voltage threshold protective component is connected in series sequentially, the other end of the first voltage threshold component leads out a phase leads and the other end of the second voltage threshold protective component leads out a neutral end; the end introduced between the first disengaging devices and the second one is connected in parallel with the discharging tube and the branch circuit comprising current limiting resistor and the quick voltage threshold protective component while the grounding terminal is between the said discharging tube and the other end of the branch circuit the phase end and neutral wire end constitutes lead neutral protection mode; the phase end and grounding end constitutes lead grounding protection mode; neutral end and ground end constitutes neutral grounding protection mode. The technical program adopted by the model utility provides a multi protection modes, little limiting voltage and quick responding surge protection device while provides a disengaging device further reflecting the true temperature.
Description
Technical field
The utility model relates to the surge protection field, more particularly, relates to a kind of many protected modes, low restriction voltage, responds the fast surge protector that is used for the low-voltage distribution system end.
Background technology
The current protector that is used for the low-voltage distribution system end usually adopts two class protectors, and a class is a votage limit type, and another kind of is switching mode.The former has leakage current to flow through under Uc, this leakage current usually can cause dangerous phenomenons such as protector is aging, for reducing leakage current, adopt the pressure sensitive voltage that improves protector, also improved simultaneously deboost, this just makes this protector be difficult to satisfy the impact tolerance performance requirement of terminal equipment; The characteristic of The latter switch element, though the deficiency that does not exist the former to wear out, the switch element response is relatively slow, as the voltage that 1kV/ μ s steepness rises, its response time reaches about 1 μ s.Simultaneously, the power frequency continued flow of switching mode after to disruptive discharge is difficult to arc extinguishing, causes the overcurrent protective device action of electrical network, the continuity of influence power supply.Also have; consider the temporary overvoltage of electrical network, the discharge voltage of switching mode must not be lower than this voltage, otherwise causes unnecessary action; this just makes the impulse sparkover voltage of this protector that a higher lower limit be arranged, and can't protect weak insulator arrangements such as electrical type.
Above-mentioned protector structurally adopt one pole list protected mode (line-ground, line-in or in-the ground protected mode), use cost is higher,
The temperature sampling point of the disconnector of above-mentioned protector is provided with away from heater element, is unfavorable for reflecting true temperature.
So, solve above-mentioned problem with regard to a kind of novel surge protector of needs.
The utility model content
The purpose of this utility model provides a kind of have concurrently many protected modes, surge protector low restriction voltage, that response is fast, also has the disconnector that more can reflect true temperature simultaneously.
According to the utility model, a kind of surge protector is provided, comprising: the first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element, discharge tube, current-limiting resistance and quick pressure limiting element, wherein,
The first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element are connected in series successively, and the other end of the first pressure limiting element is drawn the phase line end, and the other end of the second pressure limiting element is drawn middle line end;
Between first disconnector and second disconnector, draw end points, parallel discharge pipe and the branch road that composes in series by current-limiting resistance and quick pressure limiting element, the other end of described discharge tube and branch road is drawn earth terminal;
Use phase line end and middle line end to constitute line-middle protected mode;
Use phase line end and earth terminal to constitute line-ground protected mode;
During line end and earth terminal constitute in the use-the ground protected mode.
According to embodiment of the present utility model, described first disconnector, second disconnector are made of spring, push rod, heat transfer sheet and low-melting alloy.Described low-melting alloy is an environmental protection alloy material not leaded, cadmium.The described first pressure limiting element, the second pressure limiting element are the metal oxide piezo-resistance, and described discharge tube is a ceramic gas discharge tube, and described quick pressure limiting element is two-way avalanche breakdown diode, and described current-limiting resistance is a metalfilmresistor.
According to embodiment of the present utility model, the described first pressure limiting element, the second pressure limiting element are circular metal oxide piezo-resistance, the temperature sampling point of described first disconnector, second disconnector be arranged on described circle the metal oxide piezo-resistance under.Heat transfer sheet and low-melting alloy in the first pressure limiting element, the second pressure limiting element, discharge tube, current-limiting resistance, quick pressure limiting element and first disconnector, second disconnector all are fixed on the printed circuit board (PCB).
Adopt the technical solution of the utility model, a kind of have concurrently many protected modes, surge protector low restriction voltage, that response is fast are provided, also had the disconnector that more can reflect true temperature simultaneously.
Description of drawings
The above and other feature of the present utility model, character and advantage will become more obvious by the description below in conjunction with drawings and Examples, identical in the accompanying drawings Reference numeral is represented identical feature all the time, wherein,
Fig. 1 is the schematic diagram according to the surge protector of surge protection method of the present utility model;
Fig. 2 a and 2b are the structure charts according to the surge protector of an embodiment of the present utility model;
Fig. 3 a and 3b are the basis structure charts of the printed circuit board (PCB) that adopts in the embodiment shown in Figure 2.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
The basic design philosophy of the surge protector that the utility model provides is as follows, comprise: the first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element, discharge tube, current-limiting resistance and quick pressure limiting element, wherein, the first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element are connected in series successively, the other end of the first pressure limiting element is drawn phase line end L, and the other end of the second pressure limiting element is drawn middle line end N; Between first disconnector and second disconnector, draw end points M, parallel discharge pipe and the branch road that composes in series by current-limiting resistance and quick pressure limiting element, the other end of described discharge tube and branch road is drawn earth terminal PE; Use phase line end L and middle line end N to constitute line-middle protected mode L-N; Use phase line end L and earth terminal PE to constitute line-ground protected mode L-PE; During line end N and earth terminal PE constitute in the use-ground protected mode N-PE.
Surge protector embodiment
The utility model also provides a kind of surge protector; equally can be with reference to the schematic diagram shown in the figure 1; comprise: the first pressure limiting element V1, the first disconnector F1, the second disconnector F2, the second pressure limiting element V2, discharge tube G, current-limiting resistance R and quick pressure limiting elements T, wherein
The first pressure limiting element V1, the first disconnector F1, the second disconnector F2, the second pressure limiting element V2 are connected in series successively, and the other end of the first pressure limiting element V1 is drawn phase line end L, and the other end of the second pressure limiting element V2 is drawn middle line end N;
Between the first disconnector F1 and the second disconnector F2, draw end points M, parallel discharge pipe G and the branch road that composes in series by current-limiting resistance R and quick pressure limiting elements T, the other end of discharge tube G and branch road is drawn earth terminal PE;
Use phase line end L and middle line end N to constitute line-middle protected mode L-N;
Use phase line end L and earth terminal PE to constitute line-ground protected mode L-PE;
During line end N and earth terminal PE constitute in the use-ground protected mode N-PE.
According to an embodiment of the present utility model, the first disconnector F1, the second disconnector F2 are made of spring, push rod, heat transfer sheet and low-melting alloy, and wherein low melting point alloy adopts environmental protection alloy materials such as not leaded, cadmium.
The first pressure limiting element V1, the second pressure limiting element V2 adopt the metal oxide piezo-resistance.
Discharge tube G adopts ceramic gas discharge tube.
The pressure limiting elements T adopts two-way avalanche breakdown diode fast.Current-limiting resistance R adopts metalfilmresistor.
The operation principle of the circuit theory diagrams that this is shown in Figure 1 is as follows: the first pressure limiting element V1, the first disconnector F1 and current-limiting resistance R, quick pressure limiting elements T constitute bleeder circuit, bear Uc jointly.The resistance of discharge tube G is much larger than current-limiting resistance R, quick both resistance of pressure limiting elements T, and the voltage at discharge tube G two ends depends on the voltage of current-limiting resistance R, quick pressure limiting elements T.Compare with the branch road that does not have current-limiting resistance R, quick pressure limiting elements T, the voltage that discharge tube G bears at two ends greatly reduces, so discharge tube G can select lower discharge voltage element for use, thereby can reduce the deboost of protector.Under the continuous firing state, the resistance of the first pressure limiting element V1, the second pressure limiting element V2, quick pressure limiting elements T, discharge tube G is very big, and leakage current is very little, helps improving the aging security performance of protector.When surge acts on phase line end L and earth terminal PE two ends (L-PE protected mode); the branch road that the first pressure limiting element V1, the first disconnector F1 and current-limiting resistance R, quick pressure limiting elements T constitute is made response with the speed of nanosecond to surge, and the existence of current-limiting resistance R, quick pressure limiting elements T branch road has improved the response speed of surge.Continuous rising along with surge voltage, the dynamic electric resistor of the first pressure limiting element V1, quick pressure limiting elements T descends gradually, the branch road surge current increases, under the effect of current-limiting resistance R, the voltage at discharge tube G two ends rises rapidly, and when voltage rose to the discharge voltage of discharge tube G, discharge tube G began disruptive discharge, the voltage that punctures discharge tube G two ends, back is reduced to arcing pressure drop (about 20V), and the deboost at phase line end L and earth terminal PE two ends only depends on the voltage of the first pressure limiting element V1.The arc extinguishing ability of discharge tube G is only considered in the selection of the first pressure limiting element V1, and the voltage-current characteristic of the first pressure limiting element V1 is non-linear, and its piezo-resistance value can be selected for use than low value, correspondingly obtains lower deboost.After the surge effect, the dynamic electric resistor of the first pressure limiting element V1 increases rapidly, the power frequency continued flow of the first pressure limiting element V1, the first disconnector F1, discharge tube G branch road is limited within the arc extinguishing scope of discharge tube G fast, thereby makes phase line end L and earth terminal PE two ends recover normal operating conditions.Operation principle homophase line end-earth terminal (L-PE) protected mode of middle line end-earth terminal (N-PE) protected mode.
The surge protector example
According to the utility model, heat transfer sheet and low-melting alloy among the first pressure limiting element V1, the second pressure limiting element V2, discharge tube G, current-limiting resistance R, quick pressure limiting elements T and the first disconnector F1, the second disconnector F2 all are fixed on the printing board PCB.And the temperature sampling point of the first disconnector F1, the second disconnector F2 is arranged under the corresponding first pressure limiting element V1, the second pressure limiting element V2.Show structure chart with reference to figure 3a and 3b according to the embodiment of a circuit galley of the present utility model.Wherein visible metal oxide piezo-resistance as the pressure limiting element has adopted circular configuration, compares with the square structure that extensively adopts in the prior art, and circular configuration is more prone to processing.Simultaneously, shown in figure 3b, removed the first pressure limiting element V1 among Fig. 3 b, the low melting point alloy F11 of the first disconnector F1 is placed under the first pressure limiting element V1, makes F11 fully near pyrotoxin, the first pressure limiting element V1.Heat transfer sheet F10 is connected to the first pressure limiting element V1 in the circuit, and heat transfer sheet F10 links to each other with push rod, and push rod adopts adiabatic material to make, and has reduced the loss of heat conductor.The first disconnector F1 has same structure.Realize the connection of above-mentioned element and fixing by a printed circuit board (PCB), make overall structure simply compact, and eliminated the problems such as loose contact that occur easily in traditional module spliced termination process.
Fig. 2 a and 2b show the structure chart of surge protector of the present utility model; be about to the structure of above-mentioned printed circuit board (PCB) after being assembled in the surge protector; by Fig. 2 a and 2b as seen; the first disconnector F1, the second disconnector F2 comprise spring F12, F22; push rod F13, F23; heat transfer sheet F10, F20 and low-melting alloy F11, F21, and the first disconnector F1, the second disconnector F2 lay respectively at the top and bottom of printed circuit board (PCB).When the first pressure limiting element V1 or the second pressure limiting element V2 aging phenomenon occurs because of reasons such as surges, under the effect of operating voltage, its surface temperature can rise, and places heat transfer sheet and the low-melting alloy heat absorption of the first disconnector F1 under it or the second disconnector F2 and its temperature is risen.When temperature reaches it and breaks temperature, under the effect of energy-stored spring, move together, thereby the first pressure limiting element V1 or the second pressure limiting element V2 are separated from circuit in company with push rod, give a fault-signal simultaneously.
The basic design philosophy of surge protection method that the utility model proposed is as follows, pressure limiting element, disconnector, discharge tube, quick pressure limiting element are connected in the following manner with current-limiting resistance: the first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element are connected in series successively, the first pressure limiting element is also connected to phase line end L, and the second pressure limiting element is also connected to middle line end N; Between first disconnector and second disconnector, draw end points M, parallel discharge pipe and the branch road that composes in series by current-limiting resistance and quick pressure limiting element, the other end of described discharge tube and branch road is connected to earth terminal PE; Described method comprises three kinds of protected modes: line-ground protected mode L-PE, and be connected in series successively by the first pressure limiting element, first disconnector and a circuit in parallel and constitute, described parallel circuits comprises discharge tube and by current-limiting resistance and the branch road that composes in series of pressure limiting element fast; In-ground protected mode N-PE, be connected in series successively by the second pressure limiting element, second disconnector and a circuit in parallel and constitute, described parallel circuits comprises discharge tube and by current-limiting resistance and the branch road that composes in series of pressure limiting element fast; Line-middle protected mode L-N is connected in series successively and is constituted by the first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element.
Predictable expansion
Surge protection method embodiment
According to top description; those skilled in the art can predict protection range of the present utility model should relate to a kind of surge protection method equally; with reference to figure 1, this method is as follows: pressure limiting element, disconnector, discharge tube, quick pressure limiting element are connected in the following manner with current-limiting resistance:
The first pressure limiting element V1, the first disconnector F1, the second disconnector F2, the second pressure limiting element V2 are connected in series successively, and the first pressure limiting element V1 is also connected to phase line end L, and the second pressure limiting element V2 is also connected to middle line end N;
Between the first disconnector F1 and the second disconnector F2, draw end points M, parallel discharge pipe G and the branch road that composes in series by current-limiting resistance R and quick pressure limiting elements T, the other end of discharge tube G and branch road is connected to earth terminal PE;
This method comprises three kinds of protected modes:
Line-ground protected mode L-PE is connected in series successively by the first pressure limiting element V1, the first disconnector F1 and a circuit in parallel and constitutes, and parallel circuits comprises discharge tube G and by current-limiting resistance R and the branch road that composes in series of pressure limiting elements T fast;
In-ground protected mode N-PE, be connected in series successively by the second pressure limiting element V2, the second disconnector F2 and a circuit in parallel and constitute, parallel circuits comprises discharge tube G and by current-limiting resistance R and the branch road that composes in series of pressure limiting elements T fast;
Line-middle protected mode L-N is connected in series successively and is constituted by the first pressure limiting element V1, the first disconnector F1, the second disconnector F2, the second pressure limiting element V2.
According to an embodiment of the present utility model,
The above-mentioned first disconnector F1, the second disconnector F2 are made of spring, push rod, heat transfer sheet and low-melting alloy, and wherein low melting point alloy adopts and do not conform to environmental protection alloy materials such as lead, cadmium.
The above-mentioned first pressure limiting element V1, the second pressure limiting element V2 adopt the metal oxide piezo-resistance.
Above-mentioned discharge tube G adopts gas discharge tube.
Above-mentioned quick pressure limiting elements T adopts two-way avalanche breakdown diode.
Above-mentioned current-limiting resistance R adopts metalfilmresistor.
Surge protection method operation principle of the present utility model is as follows: the first pressure limiting element V1, the first disconnector F1 and current-limiting resistance R, quick pressure limiting elements T constitute bleeder circuit, bear Uc jointly.The resistance of discharge tube G is much larger than current-limiting resistance R, quick both resistance of pressure limiting elements T, and the voltage at discharge tube G two ends depends on the voltage of current-limiting resistance R, quick pressure limiting elements T.Compare with the branch road that does not have current-limiting resistance R, quick pressure limiting elements T, the voltage that discharge tube G bears at two ends greatly reduces, so discharge tube G can select lower discharge voltage element for use, thereby can reduce the deboost of protector.
Under the continuous firing state, the resistance of the first pressure limiting element V1, the second pressure limiting element V2, quick pressure limiting elements T, discharge tube G is very big, and leakage current is very little, helps improving the aging security performance of protector.
When surge acts on phase line end L and earth terminal PE two ends (L-PE protected mode); the branch road that the first pressure limiting element V1, the first disconnector F1 and current-limiting resistance R, quick pressure limiting elements T constitute is made response with the speed of nanosecond to surge, and the existence of current-limiting resistance R, quick pressure limiting elements T branch road has improved the response speed of surge.Continuous rising along with surge voltage, the dynamic electric resistor of the first pressure limiting element V1, quick pressure limiting elements T descends gradually, the branch road surge current increases, under the effect of current-limiting resistance R, the voltage at discharge tube G two ends rises rapidly, and when voltage rose to the discharge voltage of discharge tube G, discharge tube G began disruptive discharge, the voltage that punctures discharge tube G two ends, back is reduced to arcing pressure drop (about tens volts), and the deboost at phase line end L and earth terminal PE two ends only depends on the voltage of the first pressure limiting element V1.The arc extinguishing ability of discharge tube G is only considered in the selection of the first pressure limiting element V1, and the voltage-current characteristic of the first pressure limiting element V1 is non-linear, and its piezo-resistance value can be selected for use than low value, correspondingly obtains lower deboost.After the surge effect, the dynamic electric resistor of the first pressure limiting element V1 increases rapidly, the power frequency continued flow of the first pressure limiting element V1, the first disconnector F1, discharge tube G branch road is limited within the arc extinguishing scope of discharge tube G fast, thereby makes phase line end L and earth terminal PE two ends recover normal operating conditions.
Operation principle homophase line end-earth terminal (L-PE) protected mode of middle line end-earth terminal (N-PE) protected mode.
When the first pressure limiting element V1 or the second pressure limiting element V2 aging phenomenon occurs because of reasons such as surges, under the effect of operating voltage, its surface temperature can rise, and places heat transfer sheet and the low-melting alloy heat absorption of the first disconnector F1 under it or the second disconnector F2 and its temperature is risen.When temperature reaches it and breaks temperature, under the effect of energy-stored spring, move together, thereby the first pressure limiting element V1 or the second pressure limiting element V2 are separated from circuit in company with push rod, give a fault-signal simultaneously.This can describe in detail in the back.
By above-mentioned analysis as can be known, adopt the technical solution of the utility model, a kind of have concurrently many protected modes, surge protector low restriction voltage, that response is fast are provided, also had the disconnector that more can reflect true temperature simultaneously.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present utility model; those skilled in the art can be under the situation that does not break away from utility model thought of the present utility model; the foregoing description is made various modifications or variation; thereby protection range of the present utility model do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (6)
1. a surge protector is characterized in that, comprising: the first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element, discharge tube, current-limiting resistance and quick pressure limiting element, wherein,
The first pressure limiting element, first disconnector, second disconnector, the second pressure limiting element are connected in series successively, and the other end of the first pressure limiting element is drawn the phase line end, and the other end of the second pressure limiting element is drawn middle line end;
Between first disconnector and second disconnector, draw end points, parallel discharge pipe and the branch road that composes in series by current-limiting resistance and quick pressure limiting element, the other end of described discharge tube and branch road is drawn earth terminal;
Use phase line end and middle line end to constitute line-middle protected mode;
Use phase line end and earth terminal to constitute line-ground protected mode;
During line end and earth terminal constitute in the use-the ground protected mode.
2. surge protector as claimed in claim 1 is characterized in that, described first disconnector, second disconnector are made of spring, push rod, heat transfer sheet and low-melting alloy.
3. surge protector as claimed in claim 2 is characterized in that, described low-melting alloy is an environmental protection alloy material not leaded, cadmium.
4. surge protector as claimed in claim 1; it is characterized in that the described first pressure limiting element, the second pressure limiting element are the metal oxide piezo-resistance, described discharge tube is a gas discharge tube; described quick pressure limiting element is two-way avalanche breakdown diode, and described current-limiting resistance is a metalfilmresistor.
5. surge protector as claimed in claim 4; it is characterized in that; the described first pressure limiting element, the second pressure limiting element are circular metal oxide piezo-resistance, the temperature sampling point of described first disconnector, second disconnector be arranged on described circle the metal oxide piezo-resistance under.
6. surge protector as claimed in claim 2; it is characterized in that heat transfer sheet and low-melting alloy in the first pressure limiting element, the second pressure limiting element, discharge tube, current-limiting resistance, quick pressure limiting element and first disconnector, second disconnector all are fixed on the printed circuit board (PCB).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039793 CN2896638Y (en) | 2006-02-28 | 2006-02-28 | Terminal electrophoresis protector with multiple protection modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039793 CN2896638Y (en) | 2006-02-28 | 2006-02-28 | Terminal electrophoresis protector with multiple protection modes |
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| Publication Number | Publication Date |
|---|---|
| CN2896638Y true CN2896638Y (en) | 2007-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620039793 Expired - Lifetime CN2896638Y (en) | 2006-02-28 | 2006-02-28 | Terminal electrophoresis protector with multiple protection modes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438253C (en) * | 2006-02-28 | 2008-11-26 | 上海电器科学研究所（集团）有限公司 | Terminal surge protector with multi-protecting mode and protecting method |
| CN102057551A (en) * | 2008-06-09 | 2011-05-11 | Abb技术有限公司 | A protecting apparatus |
| CN106507534A (en) * | 2016-10-19 | 2017-03-15 | 成都尚智恒达科技有限公司 | A kind of lightning protection multivoltage output circuit for LED |
| CN107123975A (en) * | 2017-06-01 | 2017-09-01 | 安徽金力电气技术有限公司 | A kind of onboard surge protector |
| WO2019205863A1 (en) * | 2018-04-25 | 2019-10-31 | 厦门赛尔特电子有限公司 | Novel surge protector module |
-
2006
- 2006-02-28 CN CN 200620039793 patent/CN2896638Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438253C (en) * | 2006-02-28 | 2008-11-26 | 上海电器科学研究所（集团）有限公司 | Terminal surge protector with multi-protecting mode and protecting method |
| CN102057551A (en) * | 2008-06-09 | 2011-05-11 | Abb技术有限公司 | A protecting apparatus |
| CN102057551B (en) * | 2008-06-09 | 2013-12-25 | Abb技术有限公司 | Protecting apparatus |
| CN106507534A (en) * | 2016-10-19 | 2017-03-15 | 成都尚智恒达科技有限公司 | A kind of lightning protection multivoltage output circuit for LED |
| CN107123975A (en) * | 2017-06-01 | 2017-09-01 | 安徽金力电气技术有限公司 | A kind of onboard surge protector |
| WO2019205863A1 (en) * | 2018-04-25 | 2019-10-31 | 厦门赛尔特电子有限公司 | Novel surge protector module |
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| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081126 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |