CN201656470U - Lightning protection circuit with overcurrent protection function - Google Patents
Lightning protection circuit with overcurrent protection function Download PDFInfo
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- CN201656470U CN201656470U CN201020165810XU CN201020165810U CN201656470U CN 201656470 U CN201656470 U CN 201656470U CN 201020165810X U CN201020165810X U CN 201020165810XU CN 201020165810 U CN201020165810 U CN 201020165810U CN 201656470 U CN201656470 U CN 201656470U
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Abstract
The utility model relates to a lightning protection circuit with the overcurrent protection function and aims to provide a lightning protection circuit with the overcurrent protection function, which has simple structure and high safety coefficient and achieves the purposes of not only effectively absorbing the surge caused by thunder and lightning and operation of electrical appliances, but also effectively preventing the combustion due to heat caused by the overcurrent of the lightning protection circuit. The technical scheme is as follows: the lightning protection circuit with the overcurrent protection function comprises a live wire (L), a null wire (N) and a ground wire (G) and is characterized in that varistors M1, M2 and M3 are connected between the live wire (L) and the null wire (N), between the null wire (N) and the ground wire (G) and between the live wire (L) and the ground wire (G) respectively and are provided with alloy temperature fuses. The lightning protection circuit with the overcurrent protection function is mainly applied in different types of electrical equipment requiring surge protection, particularly the electrical sockets.
Description
Technical field
The utility model relates to a kind of lightning protection circuit, and particularly a kind of lightning protection circuit with overcurrent protection mainly is applicable in the various power consumption equipments that must carry out surge protection, especially in electrician's socket.
Background technology
At present, there are following several situations in electrical field thunderbolt or surge protection circuit:
1, most of electrician's socket is directly selected for use metal-oxide varistor (MOV) to be attempted by three extremely to go up, and is used for thunderbolt or surge protection.MOV effectively is struck by lightning and surge absorbing element, but in use, under the effect of various stress, always can lose efficacy, and its failure mode mostly is short circuit failure mode.Under this pattern, its resistance value will be reduced to several Europe or tens Europe, make short circuit current reach several peaces or tens peaces or bigger.Therefore; with MOV directly be connected to be used on electrician's socket the thunderbolt or surge protection; though can play the better protect effect; but after the short circuit failure mode of MOV takes place; the MOV that lost efficacy can not in time break away from from circuit; can cause the short circuit accident of whole supply line, and cause and catch fire or explode, cause loss difficult to the appraisal.
2, a part of electrician's socket is being selected for use on the basis of MOV; also on circuit, be serially connected with Thermal Cutoffs; the effect of existing like this thunderbolt or surge protection; again can be under the MOV short circuit failure mode; Thermal Cutoffs is in the product heating preceding disconnection of catching fire; the MOV that had lost efficacy is in time broken away from from circuit, guaranteed the safe in utilization of product.But because MOV is two discrete elements with Thermal Cutoffs, its MOV short circuit inefficacy adstante febre, the heat of its generation can not be delivered on the Thermal Cutoffs soon, has certain deficiency in thermal response sensitivity.
Chinese patent patent of invention (patent No. is 200510044661.5) discloses a kind of piezo-resistance (TMOV) that is provided with alloy-type temperature fuse, be with special processing technology, MOV is carried out the electronic component of one processing with Thermal Cutoffs, its incorporate structure helps being delivered to the heat that MOV produces on the Thermal Cutoffs apace, make temperature susceplibility is improved greatly, so both can bear very strong pulse current, can lose efficacy in the MOV short circuit again and reach a certain temperature, the MOV that had lost efficacy was in time broken away from from circuit with regard to quick-break.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of simple in structure, lightning protection circuit with overcurrent protection that coefficient of safety is high at the problem of above-mentioned existence; to reach the surge that is produced can effectively absorb because of thunder and lightning and device for switching the time, again can be excessive and cause the purpose of effectively protecting before the heating burning at self electric current.
The technical scheme that the utility model adopted is: the lightning protection circuit with overcurrent protection; have live wire L, zero line N and ground wire G, it is characterized in that: be connected piezo-resistance M1, M2 and the M3 that has alloy-type temperature fuse respectively between described live wire L and zero line N, zero line N and ground wire G and live wire L and the ground wire G.
Between the Thermal Cutoffs pin of the Thermal Cutoffs pin of described piezo-resistance M1 and piezo-resistance M2, be connected to the effective indicating circuit of lightning protection; Between the Thermal Cutoffs pin of described piezo-resistance M3 and ground wire G, also be connected to the effective indicating circuit of lightning protection.
The effective indicating circuit of described lightning protection is in series by resistance, diode and LED.
The beneficial effects of the utility model are: the utility model connects a piezo-resistance that is provided with alloy-type temperature fuse between live wire, zero line, the every the two poles of the earth of ground wire, not only guaranteed effective absorption to thunderbolt or surge, and improved susceptibility to temperature, after the piezo-resistance short circuit that promptly is provided with alloy-type temperature fuse was lost efficacy and to be reached a certain temperature, before the product heating catches fire, it in time can be opened from line interruption, thereby guarantee the safe handling of surrounding environment and various electrical appliances.
Description of drawings
Fig. 1 is the circuit diagram of embodiment 1.
Fig. 2 is the circuit diagram of embodiment 2.
Embodiment
The piezo-resistance that is provided with alloy-type temperature fuse among following each embodiment is expressed as M1, M2, M3 respectively, and on the circuit, it is in series by piezo-resistance (MOV) and alloy-type temperature fuse (TCO) internally.
Embodiment 1: as shown in Figure 1, present embodiment is electrically connected piezo-resistance M1, M2, the M3 that is provided with alloy-type temperature fuse respectively between live wire L and zero line N, zero line N and ground wire G and live wire L and ground wire G, wherein M1 is used between live wire L and zero line N the absorption of thunderbolt or surge, M2 is used between zero line N and ground wire G the absorption of thunderbolt or surge, and M3 is used for being struck by lightning between live wire L and ground wire G or the absorption of surge.
The operation principle of present embodiment is: piezo-resistance (MOV) is effectively thunderbolt and surge absorbing element, but in use, under the effect of various stress, and piezo-resistance (MOV) inefficacy that easily is short-circuited.And the heat that the alloy-type temperature fuse of connecting with piezo-resistance (TCO) can fast perception piezo-resistance (MOV) produces, reach a certain temperature with regard to quick-break in piezo-resistance (MOV) short circuit inefficacy, the piezo-resistance (MOV) that had lost efficacy is in time broken away from from circuit, guaranteed the peaceful property of lightning protection and the anti-surge effect and the use of electrician's socket.
Embodiment 2: as shown in Figure 2, as a most preferred embodiment of the present utility model, between the Thermal Cutoffs pin of the Thermal Cutoffs pin of described piezo-resistance M1 and piezo-resistance M2, be connected to the effective indicating circuit of lightning protection, promptly on the Thermal Cutoffs pin of described piezo-resistance M1, be linked in sequence resistance R 1, diode D1, LED 1, the negative pole with LED1 is connected with the pin of the Thermal Cutoffs of piezo-resistance M2 again; Between the Thermal Cutoffs pin of described piezo-resistance M3 and ground wire G, also be connected to the effective indicating circuit of lightning protection, promptly be linked in sequence on the Thermal Cutoffs pin of described piezo-resistance M3 resistance R 2, diode D2, LED 2, the negative pole with LED2 is connected with ground wire G again.
The operation principle of present embodiment is: during operate as normal, and the infinity of piezo-resistance (MOV) resistance, LED1 in the indicating circuit and LED2 are all lighted; When the piezo-resistance (MOV) of the piezo-resistance M1 that the is provided with alloy-type temperature fuse inefficacy adstante febre that is short-circuited, the alloy-type temperature fuse of M1 (TCO) quick-break, LED 1 opened circuit and extinguished this moment; In like manner, when the piezo-resistance (MOV) of the piezo-resistance M2 that is provided with alloy-type temperature fuse is short-circuited inefficacy, the alloy-type temperature fuse of M2 (TCO) fusing, Light-Emitting Diode LED1 opens circuit equally and extinguishes; In like manner, when the piezo-resistance (MOV) of the piezo-resistance M3 that the is provided with alloy-type temperature fuse inefficacy adstante febre that is short-circuited, the alloy-type temperature fuse of M3 (TCO) quick-break, LED 2 opened circuit and extinguished this moment.
In the above-described embodiments, no matter thunderbolt or surge impact take place in live wire L, zero line N and ground wire G between which two circuit, all have the corresponding piezo-resistance that is provided with alloy-type temperature fuse (TMOV) that it is absorbed protection.And in embodiment 2, also be provided with indicating circuit, and in case producing short circuit, the piezo-resistance in the circuit (MOV) lost efficacy, the LED in the indicating circuit will extinguish, and breaks down to remind user's socket or electrical equipment, guarantees Electrical Safety.
Claims (3)
1. lightning protection circuit with overcurrent protection; have live wire L, zero line N and ground wire G, it is characterized in that: be connected piezo-resistance M1, M2 and the M3 that has alloy-type temperature fuse respectively between described live wire L and zero line N, zero line N and ground wire G and live wire L and the ground wire G.
2. the lightning protection circuit with overcurrent protection according to claim 1 is characterized in that: be connected to the effective indicating circuit of lightning protection between the Thermal Cutoffs pin of the Thermal Cutoffs pin of described piezo-resistance M1 and piezo-resistance M2; Between the Thermal Cutoffs pin of described piezo-resistance M3 and ground wire G, also be connected to the effective indicating circuit of lightning protection.
3. the lightning protection circuit with overcurrent protection according to claim 2 is characterized in that: the effective indicating circuit of described lightning protection is in series by resistance, diode and LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020165810XU CN201656470U (en) | 2010-04-15 | 2010-04-15 | Lightning protection circuit with overcurrent protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020165810XU CN201656470U (en) | 2010-04-15 | 2010-04-15 | Lightning protection circuit with overcurrent protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201656470U true CN201656470U (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020165810XU Expired - Lifetime CN201656470U (en) | 2010-04-15 | 2010-04-15 | Lightning protection circuit with overcurrent protection function |
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| CN (1) | CN201656470U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456996A (en) * | 2011-04-12 | 2012-05-16 | 厦门赛尔特电子有限公司 | Lightning-protecting module for lightning-protecting socket |
| CN102761116A (en) * | 2011-12-26 | 2012-10-31 | 惠州茂硕能源科技有限公司 | Triple suppression circuit of power grid abnormity |
| CN103311882A (en) * | 2012-03-13 | 2013-09-18 | 深圳远征技术有限公司 | Lightning protection system |
| CN103956723A (en) * | 2014-03-13 | 2014-07-30 | 佛山市顺德区伦教金盾防雷技术发展有限公司 | Multi-pulse surge protector |
| CN103983820A (en) * | 2014-03-03 | 2014-08-13 | 无锡中电华安科技有限公司 | Type II special transformer acquisition terminal having anti-theft function |
| CN103983819A (en) * | 2014-03-03 | 2014-08-13 | 无锡中电华安科技有限公司 | II-type special transformer acquisition terminal with lightning protection function |
| CN104143822A (en) * | 2014-08-19 | 2014-11-12 | 四川三普科技有限公司 | Electromagnetic pulse protecting device |
| CN105119232A (en) * | 2015-09-24 | 2015-12-02 | 湖南劲阳电子有限公司 | Circuit protecting device |
| CN108028531A (en) * | 2015-09-11 | 2018-05-11 | 德恩及索恩两合股份有限公司 | Device for safely disconnecting an overvoltage protection means on the network side independently of a switchgear or a backup safety device in critical operating states |
-
2010
- 2010-04-15 CN CN201020165810XU patent/CN201656470U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102456996A (en) * | 2011-04-12 | 2012-05-16 | 厦门赛尔特电子有限公司 | Lightning-protecting module for lightning-protecting socket |
| CN102456996B (en) * | 2011-04-12 | 2014-08-06 | 厦门赛尔特电子有限公司 | Lightning-protecting module for lightning-protecting socket |
| CN102761116B (en) * | 2011-12-26 | 2015-07-08 | 惠州茂硕能源科技有限公司 | Triple suppression circuit of power grid abnormity |
| CN102761116A (en) * | 2011-12-26 | 2012-10-31 | 惠州茂硕能源科技有限公司 | Triple suppression circuit of power grid abnormity |
| CN103311882A (en) * | 2012-03-13 | 2013-09-18 | 深圳远征技术有限公司 | Lightning protection system |
| CN103311882B (en) * | 2012-03-13 | 2016-09-07 | 深圳远征技术有限公司 | A kind of lightning-protection system |
| CN103983820A (en) * | 2014-03-03 | 2014-08-13 | 无锡中电华安科技有限公司 | Type II special transformer acquisition terminal having anti-theft function |
| CN103983819A (en) * | 2014-03-03 | 2014-08-13 | 无锡中电华安科技有限公司 | II-type special transformer acquisition terminal with lightning protection function |
| CN103956723A (en) * | 2014-03-13 | 2014-07-30 | 佛山市顺德区伦教金盾防雷技术发展有限公司 | Multi-pulse surge protector |
| CN104143822A (en) * | 2014-08-19 | 2014-11-12 | 四川三普科技有限公司 | Electromagnetic pulse protecting device |
| CN104143822B (en) * | 2014-08-19 | 2017-05-31 | 四川三普科技有限公司 | Spark gap device |
| CN108028531A (en) * | 2015-09-11 | 2018-05-11 | 德恩及索恩两合股份有限公司 | Device for safely disconnecting an overvoltage protection means on the network side independently of a switchgear or a backup safety device in critical operating states |
| CN108028531B (en) * | 2015-09-11 | 2020-03-20 | 德恩塞两合公司 | Device for safely disconnecting an overvoltage protection means on the network side independently of a switchgear or a backup safety device in critical operating states |
| CN105119232A (en) * | 2015-09-24 | 2015-12-02 | 湖南劲阳电子有限公司 | Circuit protecting device |
| CN105119232B (en) * | 2015-09-24 | 2019-04-19 | 湖南劲阳电子有限公司 | A kind of circuit protective device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 315314 Zhejiang city of Ningbo province Cixi city Guanhaiwei town East Industrial Park Patentee after: Bulls group Limited by Share Ltd Address before: 315333 Zhejiang city of Cixi province Yan Zhen Kuang long she Cun Ningbo bulls Electrical Appliance Co. Ltd. Patentee before: Gongniu Group Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
|
| CX01 | Expiry of patent term |