CN100438253C - Terminal surge protector with multi-protecting mode and protecting method - Google Patents
Terminal surge protector with multi-protecting mode and protecting method Download PDFInfo
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- CN100438253C CN100438253C CNB2006100241944A CN200610024194A CN100438253C CN 100438253 C CN100438253 C CN 100438253C CN B2006100241944 A CNB2006100241944 A CN B2006100241944A CN 200610024194 A CN200610024194 A CN 200610024194A CN 100438253 C CN100438253 C CN 100438253C
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Abstract
The present invention discloses a surge protecting method. Voltage limiting elements, disengagement devices, a discharge tube, a quick voltage limiting element and a current limiting resistor are connected according to the following connecting mode: a first voltage limiting element, a first disengagement device, a second disengagement device and a second voltage limiting element are orderly connected in series; the first voltage limiting element is also connected to a phase line terminal, and the second voltage limiting element is also connected to a center line terminal; an end point is guided out from the first disengagement device and the second disengagement device; the discharge tube is parallelly connected with a branch which is formed by serially connecting the current limiting resistor and the quick voltage limiting element, and the discharge tube and the other end of the branch are connected to a grounding terminal. The present invention also discloses a surge protector; the elements are connected according to the connecting mode. The technical scheme of the present invention provides the surge protector which has the advantages of multiple protection modes, low limiting voltage and quick response through the analysis; simultaneously, the present invention is also provided with the disengagement devices which can reflect actual temperature.
Description
Technical Field
The invention relates to the field of surge protection, in particular to a multi-protection-mode, low-voltage-limit and quick-response surge protection method for a low-voltage distribution system terminal and a surge protector adopting the method.
Background
The current protectors used at the terminals of low voltage distribution systems often employ two types of protectors, one type being voltage limiting and the other type being switching. The former has leakage current flowing under continuous working voltage, the leakage current can often cause unsafe phenomena such as protector aging and the like, in order to reduce the leakage current, the voltage-sensitive voltage of the protector is improved, and the limit voltage is also improved, so that the protector is difficult to meet the requirement of the impact resistance performance of terminal equipment; the latter utilizes the characteristics of the switching element, and although the aging of the former is not insufficient, the switching element responds relatively slowly, for example, the response time of the voltage with 1 kV/mus steeply rising reaches about 1 mus. Meanwhile, the switch type is difficult to extinguish arc for power frequency follow current after breakdown discharge, so that the action of an overcurrent protection device of a power grid is caused, and the continuity of power supply is influenced. In addition, in consideration of transient overvoltage of the power grid, the discharge voltage of the switch type is not lower than the voltage, otherwise unnecessary action is caused, so that the surge discharge voltage of the protector has a higher lower limit value, and weak insulation equipment such as electronics and the like cannot be protected.
The protector adopts a single-pole single protection mode (a line-ground, line-middle or middle-ground protection mode) in structure, has higher use cost,
the temperature sampling point of the disconnector of the protector is arranged far away from the heating element, which is not beneficial to reflecting the real temperature.
Thus, there is a need for a new surge protector device to solve the above problems.
Disclosure of Invention
The invention aims to provide a surge protector which has multiple protection modes, low limiting voltage and quick response, and simultaneously has a disconnector which can reflect the real temperature better.
According to an aspect of the present invention, there is provided a surge protection method, wherein a voltage limiting element, a disconnector, a discharge tube, a fast voltage limiting element and a current limiting resistor are connected as follows:
the first pressure limiting element, the first disconnector, the second disconnector and the second pressure limiting element are sequentially connected in series, one end of the first pressure limiting element, which is not connected with the first disconnector, is also connected to a phase line end, and one end of the second pressure limiting element, which is not connected with the second disconnector, is also connected to a middle line end;
a discharge tube and a branch circuit formed by connecting a current-limiting resistor and a quick voltage-limiting element in series form a parallel circuit, one end of the parallel circuit is connected with an end point led out from between a first disconnector and a second disconnector, and the other end of the parallel circuit is led out to a grounding terminal; the method comprises the following steps:
the line-ground protection is formed by sequentially connecting a first voltage limiting element, a first disconnector and the parallel circuit in series;
the middle-ground protection is formed by sequentially connecting a second voltage limiting element, a second disconnector and a parallel circuit in series;
the line-in-line protection is formed by sequentially connecting a first voltage limiting element, a first disconnector, a second disconnector and a second voltage limiting element in series.
In the above method, the first and second disengagers are composed of a spring, a pusher, a heat transfer sheet, and a low melting point alloy. The first voltage limiting element and the second voltage limiting element are metal oxide piezoresistors, the discharge tube is a gas discharge tube, the rapid voltage limiting element is a bidirectional avalanche breakdown diode, and the current limiting resistor is a metal film resistor.
According to another aspect of the present invention, there is provided a surge protector device including: a first voltage limiting element, a first disconnector, a second voltage limiting element, a discharge tube, a current limiting resistor and a fast voltage limiting element,
the first pressure limiting element, the first disconnector, the second disconnector and the second pressure limiting element are sequentially connected in series, a phase line end is led out from one end of the first pressure limiting element, which is not connected with the first disconnector, and a middle line end is led out from one end of the second pressure limiting element, which is not connected with the second disconnector;
an end point is led out from the position between the first disconnector and the second disconnector, a discharge tube and a branch circuit formed by serially connecting a current-limiting resistor and a quick voltage-limiting element are connected in parallel, and the other ends of the discharge tube and the branch circuit are led out to be grounded;
the first voltage limiting element, the first disconnector, the second disconnector and the second voltage limiting element between the phase line end and the middle line end are connected in series to form line-in protection;
the first voltage limiting element, the first disconnector and the parallel circuit series between the phase line end and the ground end form line-ground protection;
and the second voltage limiting element, the second disconnector and the parallel circuit between the middle line terminal and the ground terminal are connected in series to form middle-ground protection.
According to an embodiment of the present invention, the first and second disengagers are composed of a spring, a pusher, a heat transfer sheet, and a low melting point alloy. The low-melting-point alloy is an environment-friendly alloy material without lead and cadmium. The first voltage limiting element and the second voltage limiting element are metal oxide piezoresistors, the discharge tube is a gas discharge tube, the rapid voltage limiting element is a bidirectional avalanche breakdown diode, and the current limiting resistor is a metal film resistor.
According to the embodiment of the invention, the first voltage limiting element and the second voltage limiting element are round metal oxide piezoresistors, the temperature sampling point of the first disconnector is arranged right below the round metal oxide piezoresistor serving as the first voltage limiting element, and the temperature sampling point of the second disconnector is arranged right below the round metal oxide piezoresistor serving as the second voltage limiting element. The first voltage limiting element, the second voltage limiting element, the discharge tube, the current limiting resistor, the quick voltage limiting element, the heat transfer sheet and the low melting point alloy of the first separator and the heat transfer sheet and the low melting point alloy of the second separator are all fixed on a printed circuit board.
By adopting the technical scheme of the invention, the surge protector which has multiple protection modes, low limiting voltage and quick response is provided, and the disconnector which can better reflect the real temperature is also provided.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout, and in which,
fig. 1 is a schematic diagram of a surge protector device according to the surge protection method of the present invention;
figures 2a and 2b are block diagrams of a surge protector device according to an embodiment of the present invention;
fig. 3a and 3b are block diagrams according to a printed circuit board employed in the embodiment shown in fig. 2.
Detailed Description
The technical scheme of the invention is further explained by combining the drawings and the embodiment.
The basic design idea of the surge protection method provided by the invention is as follows, and the voltage limiting element, the disconnector, the discharge tube, the rapid voltage limiting element and the current limiting resistor are connected in the following way: the first voltage limiting element, the first disconnector, the second disconnector and the second voltage limiting element are sequentially connected in series, the first voltage limiting element is also connected to the phase line end L, and the second voltage limiting element is also connected to the middle line end N; an end point M is led out from the position between the first disconnector and the second disconnector, a discharge tube is connected in parallel with a branch circuit formed by serially connecting a current-limiting resistor and a quick voltage-limiting element, and the other ends of the discharge tube and the branch circuit are connected to a grounding end PE; the method comprises three protection modes: the line-ground protection mode L-PE is formed by sequentially connecting a first voltage limiting element, a first disconnector and a parallel circuit in series, wherein the parallel circuit comprises a discharge tube and a branch formed by connecting a current limiting resistor and a quick voltage limiting element in series; the middle-ground protection mode N-PE is formed by sequentially connecting a second voltage limiting element, a second disconnector and a parallel circuit in series, wherein the parallel circuit comprises a discharge tube and a branch formed by connecting a current limiting resistor and a quick voltage limiting element in series; the line-in protection mode L-N is formed by sequentially connecting a first voltage limiting element, a first disconnector, a second disconnector and a second voltage limiting element in series.
Also, the basic design concept of the surge protector provided by the present invention is as follows, including: the device comprises a first voltage limiting element, a first disconnector, a second voltage limiting element, a discharge tube, a current limiting resistor and a quick voltage limiting element, wherein the first voltage limiting element, the first disconnector, the second disconnector and the second voltage limiting element are sequentially connected in series, a phase line end L is led out from the other end of the first voltage limiting element, and a middle line end N is led out from the other end of the second voltage limiting element; an end point M is led out from the position between the first disconnector and the second disconnector, a discharge tube is connected in parallel with a branch circuit formed by serially connecting a current-limiting resistor and a quick voltage-limiting element, and a grounding terminal PE is led out from the other ends of the discharge tube and the branch circuit; forming a line-medium protection mode L-N by using a phase line end L and a medium line end N; a phase line end L and a grounding end PE are used for forming a line-ground protection mode L-PE; the mid-ground protection mode N-PE is formed using the mid-line terminal N and the ground terminal PE.
Referring to fig. 1, fig. 1 is a schematic diagram of a surge protector device according to the surge protection method of the present invention, which is as follows: the voltage limiting element, the disconnector, the discharge tube, the quick voltage limiting element and the current limiting resistor are connected as follows:
the first voltage limiting element V1, the first disconnector F1, the second disconnector F2 and the second voltage limiting element V2 are sequentially connected in series, the first voltage limiting element V1 is also connected to a phase terminal L, and the second voltage limiting element V2 is also connected to a neutral terminal N;
an end point M is led out from the position between the first disconnector F1 and the second disconnector F2, a discharge tube G and a branch consisting of a current-limiting resistor R and a quick voltage-limiting element T which are connected in series are connected in parallel, and the other ends of the discharge tube G and the branch are connected to a ground terminal PE;
the method comprises three protection modes:
the line-ground protection mode L-PE is formed by sequentially connecting a first voltage limiting element V1, a first disconnector F1 and a parallel circuit in series, wherein the parallel circuit comprises a discharge tube G and a branch formed by connecting a current limiting resistor R and a quick voltage limiting element T in series;
the middle-ground protection mode N-PE is formed by sequentially connecting a second voltage limiting element V2, a second disconnector F2 and a parallel circuit in series, wherein the parallel circuit comprises a discharge tube G and a branch formed by connecting a current limiting resistor R and a quick voltage limiting element T in series;
the line-in protection mode L-N is formed by sequentially connecting a first voltage limiting element V1, a first disconnector F1, a second disconnector F2 and a second voltage limiting element V2 in series.
In accordance with an embodiment of the present invention,
the first detacher F1 and the second detacher F2 are composed of a spring, a push rod, a heat transfer sheet and low-melting-point alloy, wherein the low-melting-point alloy material is environment-friendly alloy material without lead, cadmium and the like.
The first voltage limiting element V1 and the second voltage limiting element V2 are metal oxide piezoresistors.
The discharge tube G is a gas discharge tube.
The fast voltage limiting element T adopts a bidirectional avalanche breakdown diode.
The current limiting resistor R is a metal film resistor.
The working principle of the surge protection method of the invention is as follows: the first voltage limiting element V1, the first disconnector F1, the current limiting resistor R and the fast voltage limiting element T form a voltage dividing circuit, and share the continuous working voltage. The resistance of the discharge tube G is far larger than the resistance of the current limiting resistor R and the rapid voltage limiting element T, and the voltage at two ends of the discharge tube G depends on the voltage of the current limiting resistor R and the rapid voltage limiting element T. Compared with the branch without the current-limiting resistor R and the rapid voltage-limiting element T, the voltage born by the two ends of the discharge tube G is greatly reduced, so that the discharge tube G can select a lower discharge voltage element, and the limiting voltage of the protector can be reduced.
Under the continuous working state, the first voltage limiting element V1, the second voltage limiting element V2, the rapid voltage limiting element T and the discharge tube G have very large resistance and very small leakage current, and the aging safety performance of the protector is favorably improved.
When a surge acts on two ends of a phase line end L and a grounding end PE (L-PE protection mode), a branch formed by the first voltage limiting element V1, the first disconnector F1, the current limiting resistor R and the rapid voltage limiting element T responds to the surge at a nanosecond speed, and the current limiting resistor R and the rapid voltage limiting element T improve the response speed of the surge. With the continuous rise of surge voltage, the dynamic resistances of the first voltage limiting element V1 and the fast voltage limiting element T gradually decrease, the branch surge current increases, the voltage at the two ends of the discharge tube G rapidly rises under the action of the current limiting resistor R, when the voltage rises to the discharge voltage of the discharge tube G, the discharge tube G starts to breakdown and discharge, the voltage at the two ends of the discharge tube G after breakdown falls to an arc voltage drop (about tens of volts), and the limiting voltages at the two ends of the phase line end L and the grounding end PE only depend on the voltage of the first voltage limiting element V1. The first voltage-limiting element V1 is selected only in consideration of the arc extinguishing capability of the discharge tube G, the volt-ampere characteristic of the first voltage-limiting element V1 is non-linear, and the voltage dependent resistance thereof can be selected to a lower value, and accordingly a lower limiting voltage can be obtained. After the surge action, the dynamic resistance of the first voltage-limiting element V1 is rapidly increased, and the power frequency follow current of the first voltage-limiting element V1, the first disconnector F1 and the branch of the discharge tube G is rapidly limited within the arc extinguishing range of the discharge tube G, so that the two ends of the phase line end L and the grounding end PE are restored to the normal working state.
The working principle of the middle line terminal-ground terminal (N-PE) protection mode is the same as that of the same line terminal-ground terminal (L-PE) protection mode.
When the first voltage limiting element V1 or the second voltage limiting element V2 is aged due to surge, the surface temperature thereof will rise under the action of the operating voltage, and the heat transfer sheet and the low melting point alloy of the first detacher F1 or the second detacher F2 disposed right below the first voltage limiting element V1 or the second voltage limiting element V2 absorb heat to raise the temperature thereof. When the temperature reaches its snapping temperature, it moves together with the push rod under the action of the energy storage spring, so that the first voltage-limiting element V1 or the second voltage-limiting element V2 is disconnected from the circuit and a fault signal is given. This will be described in detail later.
The present invention also provides a surge protector device, also referred to the schematic diagram shown in fig. 1, comprising: a first voltage limiting element V1, a first disconnector F1, a second disconnector F2, a second voltage limiting element V2, a discharge tube G, a current limiting resistor R and a fast voltage limiting element T, wherein,
the first pressure limiting element V1, the first disconnector F1, the second disconnector F2 and the second pressure limiting element V2 are sequentially connected in series, a phase line end L is led out from the other end of the first pressure limiting element V1, and a middle line end N is led out from the other end of the second pressure limiting element V2;
an end point M is led out from the position between the first disconnector F1 and the second disconnector F2, a discharge tube G is connected in parallel with a branch circuit formed by serially connecting a current-limiting resistor R and a quick voltage-limiting element T, and a grounding end PE is led out from the other ends of the discharge tube G and the branch circuit;
forming a line-medium protection mode L-N by using a phase line end L and a medium line end N;
a phase line end L and a grounding end PE are used for forming a line-ground protection mode L-PE;
the mid-ground protection mode N-PE is formed using the mid-line terminal N and the ground terminal PE.
According to one embodiment of the invention, the first detacher F1 and the second detacher F2 are composed of a spring, a push rod, a heat transfer sheet and a low-melting-point alloy, wherein the low-melting-point alloy material is an environment-friendly alloy material without lead, cadmium and the like.
The first voltage limiting element V1 and the second voltage limiting element V2 adopt metal oxide piezoresistors.
The discharge tube G is a gas discharge tube.
The fast voltage limiting element T adopts a bidirectional avalanche breakdown diode. The current limiting resistor R is a metal film resistor.
The principle of operation of the schematic circuit shown in fig. 1 is as follows: the first voltage limiting element V1, the first disconnector F1, the current limiting resistor R and the fast voltage limiting element T form a voltage dividing circuit, and share the continuous working voltage. The resistance of the discharge tube G is far larger than the resistance of the current limiting resistor R and the rapid voltage limiting element T, and the voltage at two ends of the discharge tube G depends on the voltage of the current limiting resistor R and the rapid voltage limiting element T. Compared with the branch without the current-limiting resistor R and the rapid voltage-limiting element T, the voltage born by the two ends of the discharge tube G is greatly reduced, so that the discharge tube G can select a lower discharge voltage element, and the limiting voltage of the protector can be reduced. Under the continuous working state, the first voltage limiting element V1, the second voltage limiting element V2, the rapid voltage limiting element T and the discharge tube G have very large resistance and very small leakage current, and the aging safety performance of the protector is favorably improved. When a surge acts on two ends of a phase line end L and a grounding end PE (L-PE protection mode), a branch formed by the first voltage limiting element V1, the first disconnector F1, the current limiting resistor R and the rapid voltage limiting element T responds to the surge at a nanosecond speed, and the current limiting resistor R and the rapid voltage limiting element T improve the response speed of the surge. With the continuous rise of surge voltage, the dynamic resistances of the first voltage limiting element V1 and the fast voltage limiting element T gradually decrease, the branch surge current increases, the voltage at the two ends of the discharge tube G rapidly rises under the action of the current limiting resistor R, when the voltage rises to the discharge voltage of the discharge tube G, the discharge tube G starts to breakdown and discharge, the voltage at the two ends of the discharge tube G after breakdown falls to an arcing voltage drop (about 20V), and the limiting voltages at the two ends of the phase line end L and the grounding end PE only depend on the voltage of the first voltage limiting element V1. The first voltage-limiting element V1 is selected only in consideration of the arc extinguishing capability of the discharge tube G, the volt-ampere characteristic of the first voltage-limiting element V1 is non-linear, and the voltage dependent resistance thereof can be selected to a lower value, and accordingly a lower limiting voltage can be obtained. After the surge action, the dynamic resistance of the first voltage-limiting element V1 is rapidly increased, and the power frequency follow current of the first voltage-limiting element V1, the first disconnector F1 and the branch of the discharge tube G is rapidly limited within the arc extinguishing range of the discharge tube G, so that the two ends of the phase line end L and the grounding end PE are restored to the normal working state. The working principle of the middle line terminal-ground terminal (N-PE) protection mode is the same as that of the same line terminal-ground terminal (L-PE) protection mode.
According to the invention, the first voltage limiting element V1, the second voltage limiting element V2, the discharge tube G, the current limiting resistor R, the quick voltage limiting element T, and the heat transfer sheet and the low melting point alloy in the first detacher F1 and the second detacher F2 are all fixed on a printed circuit board PCB. And the temperature sampling points of the first disconnector F1 and the second disconnector F2 are arranged right below the corresponding first voltage limiting element V1 and the second voltage limiting element V2. Referring to fig. 3a and 3b, there is shown a block diagram of an embodiment of a circuit printing plate according to the present invention. It can be seen that the metal oxide varistor as a voltage limiting element has a circular structure which is easier to process than the square structures widely used in the prior art. Meanwhile, referring to fig. 3b, in fig. 3b, the first pressure limiting element V1 is removed, and the low melting point alloy material F11 of the first detacher F1 is placed right under the first pressure limiting element V1, so that F11 is sufficiently close to the heat generating source, the first pressure limiting element V1. The heat transfer sheet F10 connects the first voltage limiting element V1 to the circuit, the heat transfer sheet F10 is connected with the push rod, and the push rod is made of heat-insulating materials, so that the loss of heat transfer conductors is reduced. The first detacher F1 has the same structure. The connection and fixation of the components are realized through one printed circuit board, so that the whole structure is simple and compact, and the problems of poor contact and the like easily occurring in the traditional module splicing process are solved.
Fig. 2a and 2b show a configuration of the surge protector of the present invention, namely, a configuration after the above-mentioned printed circuit board is assembled into the surge protector, as can be seen from fig. 2a and 2b, each of the first detacher F1 and the second detacher F2 includes springs F12 and F22, push rods F13 and F23, heat transfer fins F10 and F20, and low melting point alloys F11 and F21, and the first detacher F1 and the second detacher F2 are respectively located above and below the printed circuit board. When the first voltage limiting element V1 or the second voltage limiting element V2 is aged due to surge, the surface temperature thereof will rise under the action of the operating voltage, and the heat transfer sheet and the low melting point alloy of the first detacher F1 or the second detacher F2 disposed right below the first voltage limiting element V1 or the second voltage limiting element V2 absorb heat to raise the temperature thereof. When the temperature reaches its snapping temperature, it moves together with the push rod under the action of the energy storage spring, so that the first voltage-limiting element V1 or the second voltage-limiting element V2 is disconnected from the circuit and a fault signal is given.
Through the analysis, the technical scheme of the invention provides the surge protector which has multiple protection modes, low limiting voltage and quick response, and also has the disconnector which can better reflect the real temperature.
The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.
Claims (9)
1. A surge protection method is characterized in that a voltage limiting element, a disconnector, a discharge tube, a quick voltage limiting element and a current limiting resistor are connected as follows:
the first pressure limiting element, the first disconnector, the second disconnector and the second pressure limiting element are sequentially connected in series, one end of the first pressure limiting element, which is not connected with the first disconnector, is also connected to a phase line end, and one end of the second pressure limiting element, which is not connected with the second disconnector, is also connected to a middle line end;
a discharge tube and a branch circuit formed by connecting a current-limiting resistor and a quick voltage-limiting element in series form a parallel circuit, one end of the parallel circuit is connected with an end point led out from between a first disconnector and a second disconnector, and the other end of the parallel circuit is led out to a grounding terminal;
the method comprises the following steps:
the line-ground protection is formed by sequentially connecting a first voltage limiting element, a first disconnector and the parallel circuit in series;
the middle-ground protection is formed by sequentially connecting a second voltage limiting element, a second disconnector and the parallel circuit in series;
the line-in-line protection is formed by sequentially connecting a first voltage limiting element, a first disconnector, a second disconnector and a second voltage limiting element in series.
2. The method of claim 1, wherein the first and second disengagers are comprised of springs, push rods, heat transfer fins, and low melting point alloys.
3. The method of claim 1, wherein the first voltage limiting element and the second voltage limiting element are metal oxide varistors, the discharge tube is a gas discharge tube, the fast voltage limiting element is a bidirectional avalanche breakdown diode, and the current limiting resistor is a metal film resistor.
4. A surge protector device, comprising: a first voltage limiting element, a first disconnector, a second voltage limiting element, a discharge tube, a current limiting resistor and a fast voltage limiting element,
the first pressure limiting element, the first disconnector, the second disconnector and the second pressure limiting element are sequentially connected in series, a phase line end is led out from one end of the first pressure limiting element, which is not connected with the first disconnector, and a middle line end is led out from one end of the second pressure limiting element, which is not connected with the second disconnector;
a discharge tube and a branch circuit formed by connecting a current-limiting resistor and a quick voltage-limiting element in series form a parallel circuit, one end of the parallel circuit is connected with an end point led out from between a first disconnector and a second disconnector, and the other end of the parallel circuit is led out to a grounding terminal; wherein,
the first voltage limiting element, the first disconnector, the second disconnector and the second voltage limiting element between the phase line end and the middle line end are connected in series to form line-in protection;
the first voltage limiting element, the first disconnector and the parallel circuit series between the phase line end and the ground end form line-ground protection;
and the second voltage limiting element, the second disconnector and the parallel circuit between the middle line terminal and the ground terminal are connected in series to form middle-ground protection.
5. A surge arrester as claimed in claim 4, wherein the first and second disengagers are formed from springs, push rods, heat transfer fins, and low melting point alloys.
6. A surge protector device as defined in claim 5, wherein the low-melting alloy is an environmentally friendly alloy material that is free of lead and cadmium.
7. A surge protector according to claim 4, wherein said first and second voltage limiting elements are metal oxide varistors, said discharge tube is a gas discharge tube, said fast voltage limiting element is a bidirectional avalanche breakdown diode, and said current limiting resistor is a metal film resistor.
8. A surge protector according to claim 7, wherein the first and second voltage limiting elements are circular metal oxide varistors, and wherein the temperature sampling point of the first disconnector is located directly below the circular metal oxide varistor as the first voltage limiting element, and the temperature sampling point of the second disconnector is located directly below the circular metal oxide varistor as the second voltage limiting element.
9. A surge protector device according to claim 5, wherein the first voltage limiting element, the second voltage limiting element, the discharge tube, the current limiting resistor, the quick voltage limiting element, the heat transfer sheet and the low melting point alloy of the first disconnector, and the heat transfer sheet and the low melting point alloy of the second disconnector are fixed to a printed circuit board.
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| CNB2006100241944A CN100438253C (en) | 2006-02-28 | 2006-02-28 | Terminal surge protector with multi-protecting mode and protecting method |
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| CNB2006100241944A CN100438253C (en) | 2006-02-28 | 2006-02-28 | Terminal surge protector with multi-protecting mode and protecting method |
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| DE102011011254A1 (en) * | 2010-12-08 | 2012-06-14 | Dehn + Söhne Gmbh + Co. Kg | Surge arrester arrangement with at least one varistor discharge element |
| CN106451397A (en) * | 2016-11-30 | 2017-02-22 | 东莞市阿甘半导体有限公司 | Lightning protection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1267468A2 (en) * | 2001-06-15 | 2002-12-18 | Circuit Breaker Industries Limited | Surge protective device |
| CN2566515Y (en) * | 2002-08-05 | 2003-08-13 | 浙江神龙电器有限公司 | Surge protector for place-in low voltage distributing system |
| CN2646925Y (en) * | 2003-09-17 | 2004-10-06 | 舜全电子（苏州）有限公司 | Multifunctional voltage-limiting surge protector |
| US20050152085A1 (en) * | 2004-01-09 | 2005-07-14 | Skinner James L. | Low cost surge protection |
| CN1685581A (en) * | 2002-10-08 | 2005-10-19 | 硅系统设计公司 | Over voltage protection circuit |
| CN2896638Y (en) * | 2006-02-28 | 2007-05-02 | 上海电器科学研究所（集团）有限公司 | Terminal electrophoresis protector with multiple protection modes |
-
2006
- 2006-02-28 CN CNB2006100241944A patent/CN100438253C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1267468A2 (en) * | 2001-06-15 | 2002-12-18 | Circuit Breaker Industries Limited | Surge protective device |
| CN2566515Y (en) * | 2002-08-05 | 2003-08-13 | 浙江神龙电器有限公司 | Surge protector for place-in low voltage distributing system |
| CN1685581A (en) * | 2002-10-08 | 2005-10-19 | 硅系统设计公司 | Over voltage protection circuit |
| CN2646925Y (en) * | 2003-09-17 | 2004-10-06 | 舜全电子（苏州）有限公司 | Multifunctional voltage-limiting surge protector |
| US20050152085A1 (en) * | 2004-01-09 | 2005-07-14 | Skinner James L. | Low cost surge protection |
| CN2896638Y (en) * | 2006-02-28 | 2007-05-02 | 上海电器科学研究所（集团）有限公司 | Terminal electrophoresis protector with multiple protection modes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1812218A (en) | 2006-08-02 |
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