CN2744037Y - Overheat protector for surge protector - Google Patents
Overheat protector for surge protector Download PDFInfo
- Publication number
- CN2744037Y CN2744037Y CN 200420076673 CN200420076673U CN2744037Y CN 2744037 Y CN2744037 Y CN 2744037Y CN 200420076673 CN200420076673 CN 200420076673 CN 200420076673 U CN200420076673 U CN 200420076673U CN 2744037 Y CN2744037 Y CN 2744037Y
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- China
- Prior art keywords
- pressure
- sensitive valve
- protector
- model
- surge protector
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- Expired - Lifetime
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Abstract
The utility model discloses an overheat protector for surge protector, which is provided with a pressure-sensitive valve plate (2) in an internal frame (1). One electrode of this overheat protector is connected with an inner conductor by an external pin (3), and the other electrode is welded with a trip spring piece (5) through the low-melting alloy material (4) and is connected with a phase wire through another external pin (6). The utility model has the advantages of simple structure, dependable performance, easy use, low cost, etc. When the ZnO pressure-sensitive valve plate deteriorates at early stage, the overheat protector has the function of tripping, which can avoid the accidents caused by the combustion of surge protector, short circuit of power supply, etc. The utility model can further increase the safety in operation and reliability of the distributed system.
Description
Technical field
The utility model relates to overvoltage protection, particularly a kind of overtemperature protection system of Surge Protector.
Background technology
Along with development of times, thunder and lightning more and more causes concern to the mortal injury of various electric equipments.Introduce equipment by power transmission line, the common Surge Protector that contains the pressure-sensitive valve block of ZnO of between transmission line and power consumption equipment, installing in order to prevent lightning current.Surge Protector (SPD) existing problems are at present; After Surge Protector is repeatedly impacted by overvoltage, deterioration in characteristics progressively; Leakage current constantly increases when operate as normal, causes the heating of ZnO chip varistor, and thermal breakdown takes place, and causes power supply short circuit, burns Surge Protector, causes accident of power supply.Usual manner is to the insurance of ZnO chip varistor serial connection; But, if this kind mode serial connection insurance capacity is little, can not bears very big overvoltage and impact, when serial connection insurance capacity was big, after the ZnO chip varistor deterioration in characteristics, insurance needed very big electric current to fuse or constantly, causes power supply short circuit equally, causes accident of power supply.Also there is the problem of hot melt puncture in ZnO pressure sensitive valve sheet chip self simultaneously; in case ZnO pressure sensitive valve sheet chip is punctured by hot melt; equivalence is a conductor that resistance is very low, causes system short-circuit, and only breakdown point continues heating; arc burning takes place sometimes; make material in the Surge Protector at the utmost point in the short time, high-temperature gasification, pressure increases suddenly; set off an explosion or the flame burning, cause the serious consequence of equipment, building damage.
Summary of the invention
Technical problem to be solved in the utility model is: the overtemperature protection system that a kind of Surge Protector is provided; this device has the inefficacy tripping function after the early stage deterioration of the pressure-sensitive valve block of ZnO (inefficacy), thereby reaches the purpose of being avoided overvoltage (for example thunderbolt) by objects such as the equipment of its protection, buildings.
The technical scheme that the utility model adopted is as follows: be provided with pressure-sensitive valve block, it places in the internal frame, and one electrode is joined by an outer pin and zero line, another electrode is by the welding of low melting point alloy and dropout shell fragment, this dropout shell fragment again outside another pin and phase line join.
The utlity model has simple in structure, dependable performance, easy to use and low cost and other advantages, simultaneously, when the early stage deterioration of the pressure-sensitive valve block of ZnO, have tripping function.It not only has the effect of shunting amplitude limit to overvoltage, and threads off automatically when leakage current increase the causing pressure-sensitive valve block adstante febre of ZnO of the pressure-sensitive valve block of ZnO, cuts off the Surge Protector power circuit, accidents such as Surge Protector burns to avoid, power supply short circuit.Thereby reach the purpose of avoiding thunderbolt by objects such as the equipment of its protection, buildings.Therefore the utility model can further increase the safety in operation and the reliability of distribution system.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
Embodiment
Origin of the present utility model is: concerning the votage limit type Surge Protector, fail safe is its most crucial technology.Therefore heat break away from protection mechanism structure in different ways, ZnO pressure sensitive valve sheet chip was lost efficacy after, can in the shortest time, make Surge Protector break away from power circuit effectively reliably, protect the follow-up ZnO pressure sensitive valve sheet chip hot melt puncture that do not take place.
The utility model is described in further detail below in conjunction with accompanying drawing.
Structure of the present utility model is as shown in the figure: be provided with pressure-sensitive valve block 2, it places in the internal frame 1, and one electrode is joined with zero line by outer pin 3, and another electrode joins through outer pin 6 and phase line by low melting point alloy 4 and 5 welding of dropout shell fragment.
Above-mentioned internal frame 1 is the maintenance body of other part.Pressure-sensitive valve block 2 can be selected the pressure-sensitive valve block of commercially available ZnO for use.The melting temperature of low melting point alloy 4 can be 80～180 ℃.
The course of work of the present utility model is summarized as follows:
Impact down when the overvoltage that is produced by factors such as thunders and lightnings, pressure-sensitive valve block 2 produces heat under the effect of power current, and heat conducts to low melting point alloy 4 by electrode, makes low melting point alloy 4 little molten; Under the effect of elastic force, dropout shell fragment 5 and electrode are thrown off, thereby the pressure-sensitive valve block 2 that lost efficacy breaks away from from circuit, cuts off the SPD power circuit.So, avoided Surge Protector generation pyrophoricity accident, and then made the object such as equipment, building of its protection avoid the injury of overvoltage such as thunderbolt.
Claims (2)
1. the overtemperature protection system of a Surge Protector; it is characterized in that being provided with pressure-sensitive valve block (2); it places in the internal frame (1); and; one electrode is joined by outer pin (3) and zero line; another electrode joins through outer pin (6) and phase line by low melting point alloy (4) and dropout shell fragment (5) welding.
2. the overtemperature protection system of Surge Protector according to claim 1 is characterized in that pressure-sensitive valve block (2) is the pressure-sensitive valve block of ZnO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420076673 CN2744037Y (en) | 2004-09-23 | 2004-09-23 | Overheat protector for surge protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420076673 CN2744037Y (en) | 2004-09-23 | 2004-09-23 | Overheat protector for surge protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2744037Y true CN2744037Y (en) | 2005-11-30 |
Family
ID=35634053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420076673 Expired - Lifetime CN2744037Y (en) | 2004-09-23 | 2004-09-23 | Overheat protector for surge protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2744037Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082427A (en) * | 2010-12-21 | 2011-06-01 | 上海雷迅防雷技术有限公司 | Surge protector adopting pressure-sensitive chip and graphite sheet in serial connection |
| CN103296670A (en) * | 2012-03-02 | 2013-09-11 | 广东电网公司清远供电局 | Direct current power supply lightning arrester used for electrical power system |
-
2004
- 2004-09-23 CN CN 200420076673 patent/CN2744037Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102082427A (en) * | 2010-12-21 | 2011-06-01 | 上海雷迅防雷技术有限公司 | Surge protector adopting pressure-sensitive chip and graphite sheet in serial connection |
| CN103296670A (en) * | 2012-03-02 | 2013-09-11 | 广东电网公司清远供电局 | Direct current power supply lightning arrester used for electrical power system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Ailao Hi Tech Co. Ltd. Assignor: Wuhan Arrow Advanced Technology Co.,Ltd. Contract fulfillment period: 2008.9.20 to 2014.9.23 Contract record no.: 2008990001424 Denomination of utility model: Overheat protector for surge protector Granted publication date: 20051130 License type: Exclusive license Record date: 20081211 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.20 TO 2014.9.23; CHANGE OF CONTRACT Name of requester: BEIJING AILAO HIGH SCIENCE CO., LTD. Effective date: 20081211 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140923 Granted publication date: 20051130 |