CN202797931U - Power lightning arrester for overvoltage protection device - Google Patents
Power lightning arrester for overvoltage protection device Download PDFInfo
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- CN202797931U CN202797931U CN 201220295987 CN201220295987U CN202797931U CN 202797931 U CN202797931 U CN 202797931U CN 201220295987 CN201220295987 CN 201220295987 CN 201220295987 U CN201220295987 U CN 201220295987U CN 202797931 U CN202797931 U CN 202797931U
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- overvoltage protection
- discharge tube
- transient suppression
- suppression diode
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Abstract
The utility model discloses a power lightning arrester for an overvoltage protection device, which comprises a varistor, a gas discharge tube, a divider resistor, a transient suppression diode and an overvoltage protection device, wherein the transient suppression diode and the divider resistor are arranged in series; the gas discharge tube is connected in parallel with the transient suppression diode and the divider resistor after connected in series; the varistor is connected in series with the gas discharge tube, the transient suppression diode and the divider resistor after connected in parallel; and the varistor is further connected with the overvoltage protection device. By adopting the above scheme, the power lightning arrester has the advantages of large current through amount, quick response time, low residual voltage, no follow current, and good thermal stability; when the lightning current exceeds the maximum capacity of the power lightning arrester, a fuse is disconnected under the overvoltage effect, and at the same time, temperature of the zinc oxide varistor is raised due to over cut to disconnect the fuse, thereby achieving both overvoltage and temperature protection effects and achieving a good lightning-protection effect.
Description
Technical field
The utility model relates to a kind of power arrester of overvoltage protection, belongs to the lightning protection technical field.
Background technology
In today of information age, computer network and communication apparatus are more and more accurate, the requirement of its operational environment is also more and more higher, and the transient overvoltage of thunder and lightning and large electric equipment can pass through circuits intrusion indoor electric equipment and the network equipments such as power supply, antenna, radio signal transceiver more and more frequently, cause equipment or components and parts to damage, casualties, transmission or the data that store are interfered or lose, even make electronic equipment produce misoperation or temporary transient paralysis, system-down, transfer of data is interrupted, and local area network (LAN) and even wide area network are destroyed.Its harm is startling, and indirect loss generally is far longer than direct economic loss.Lightning arrester is exactly to keep away the equipment that ends by in the thunderbolt by modern electricity and other technology.
Common power arrester defective is that through-current capacity is little, reflecting time is slow, and the residual voltage height is without afterflow, poor heat stability, the power arrester long-term work makes the rising of Zinc-oxide piezoresistor temperature cause the example of power arrester complete machine damage a lot of owing to cross to cut in electrical network.
The utility model content
The utility model is exactly in order to solve above-mentioned technical problem; the power arrester of a kind of overvoltage protection that proposes; this power arrester through-current capacity is large; reflecting time is fast; residual voltage is low without afterflow; Heat stability is good; when lightning current surpasses the power arrester maximum bearing ability; because overvoltage effect; fuse is disconnected; make the rising of Zinc-oxide piezoresistor temperature that fuse is disconnected owing to crossing to cut simultaneously, play overvoltage and temperature dual protective effect, can reach good lightning-arrest effect.
Concrete technical scheme of the present utility model is as follows:
A kind of power arrester of overvoltage protection comprises piezo-resistance, gas discharge tube, divider resistance, Transient Suppression Diode and overvoltage protection; Wherein, the series connection of described Transient Suppression Diode and divider resistance arranges; Described gas discharge tube with connect after Transient Suppression Diode, divider resistance be arranged in parallel; The setting of connecting with gas discharge tube, Transient Suppression Diode, divider resistance after the parallel connection of described piezo-resistance; Described piezo-resistance further is connected with overvoltage protection.
Described overvoltage protection comprises detection control apparatus and switching device, and wherein switching device is connected between civil power and the protected electrical equipment; Wherein relatively control loop comprises integrated resistor, diode and a triode; Described resistance and back-biased diode are connected in turn between the base stage and emitter of triode.
The concrete number of described gas discharge tube is two, and these two gas discharge tubes are arranged in parallel.
Useful technique effect of the present utility model is: described power arrester has been given full play to the fast characteristics of ZnO resistors reflecting time, has to combine gas discharge tube and have advantage than the high throughflow ability.Lightning arrester has used more ZnO resistors to improve the through-current capability of whole lightning arrester on circuit, uses gas discharge tube as discharge channel for subsequent use.Based on this perfect circuit structure greatly improved the useful life of lightning arrester.
Description of drawings
Fig. 1 is schematic diagram of the present utility model.
Embodiment
The utility model provides a kind of power arrester of overvoltage protection; this power arrester through-current capacity is large; reflecting time is fast, and residual voltage is low without afterflow, Heat stability is good; when lightning current surpasses the power arrester maximum bearing ability; because the overvoltage effect can make the fuse disconnection, make the rising of Zinc-oxide piezoresistor temperature that fuse is disconnected owing to crossing to cut simultaneously; play overvoltage and temperature dual protective effect, can reach well lightning-arrest effect.
Below in conjunction with specific embodiment and Figure of description the utility model is further elaborated and illustrates: as shown in Figure 1, a kind of power arrester of overvoltage protection comprises piezo-resistance, gas discharge tube, divider resistance, Transient Suppression Diode and overvoltage protection; Wherein, the series connection of described Transient Suppression Diode and divider resistance arranges; Described gas discharge tube with connect after Transient Suppression Diode, divider resistance be arranged in parallel; The setting of connecting with gas discharge tube, Transient Suppression Diode, divider resistance after the parallel connection of described piezo-resistance; Described piezo-resistance further is connected with overvoltage protection.
Described overvoltage protection comprises detection control apparatus and switching device, and wherein switching device is connected between civil power and the protected electrical equipment; Wherein relatively control loop comprises integrated resistor, diode and a triode; Described resistance and back-biased diode are connected in turn between the base stage and emitter of triode.
The concrete number of described gas discharge tube is two, and these two gas discharge tubes are arranged in parallel.
Zinc-oxide piezoresistor is the votage limit type protection device, presents high-impedance state when not having pulse voltage, in case response impulse voltage arrives certain value with limiting voltage immediately, its change in the instantaneous impedance is low resistive state.Compare with gas discharge tube, the advantage of its maximum is to be higher than operating voltage because of residual voltage when its absorbs pulse voltage, can not cause the instantaneous short circuit of power supply, also can not produce afterflow.The response time of Zinc-oxide piezoresistor is faster than gas discharge tube.The climbing speed of the puncture voltage pulse voltage of gas discharge tube is very responsive, and the voltage climbing speed is faster, and ignition voltage is higher, and the response time is faster.Can selecting properly piezo-resistance and these two classes components and parts of gas discharge tube, and the power arrester that utilizes their advantages separately to make up, its overall performance is relatively better.Require Zinc-oxide piezoresistor in the power arrester, has good energy resistance characteristics, and the energy resistance characteristics is mainly described with specified lightning impulse current, maximum lightning impulse current and energy tolerance three norms, these characteristics are relevant with the surface area of Zinc-oxide piezoresistor, and are relevant with the radiating condition of element.The piezo-resistance of same specification, owing to manufacturing process, the composition of raw materials of different manufacturers are different, its energy capability can differ greatly.
Gas discharge tube has the very strong ability that macro-energy is impacted of bearing, but when concrete the use, because gas discharge tube residual voltage when discharge is extremely low, be similar to short-circuit condition, therefore can not in power arrester, use separately, the flow-resistant capacity of gas discharge tube is relevant with caliber, and caliber is larger, and flow-resistant capacity is better.The quality problems main manifestations of gas discharge tube is chronic leakage, the long-time integrity problem (after namely suffering repeatedly lightning impulse, the dc breakdown magnitude of voltage is offset) that uses, and light sensitive effect and discreteness are larger.Although domestic gas discharge tube has had larger improvement in recent years, quality is progressively improving, and the total quality problem still exists, particularly integrity problem and chronic leakage problem.Therefore select the product of imported and famous brand gas discharge tube should be as first-selection in the power arrester, and the caliber of gas discharge tube more than φ 8mm for well.
Transient Suppression Diode: two kinds of forms are arranged: the one, Zener type (being unidirectional avalanche breakdown), the 2nd, two-way silicon piezo-resistance.The similar switching diode of performance etc.Under the reverse voltage effect of regulation; both end voltage is during greater than threshold voltage; its working impedance can be down to very low level immediately allowing large electric current to pass through, and both end voltage is clamped down in very low level, thereby effectively protects the precision element in the terminal electronic product to avoid damaging.Two-way TVS can absorb instantaneous large pulsating power at positive and negative both direction, and voltage clamp at predeterminated level.Be applicable to alternating current circuit.
Power arrester can discharge thunder and lightning or hold concurrently and can discharge power system operation overvoltage energy, and the protection electrical equipment is avoided instantaneous overvoltage harm, can block afterflow again, the unlikely electrical installation that causes the system earth short circuit.Lightning arrester is connected between live wire and the ground usually, and is in parallel with protected equipment.When overvoltage value reached the operation voltage of regulation, lightning arrester moved immediately, flow through electric charge, and the over-voltage amplitude is protected apparatus insulated; After magnitude of voltage was normal, lightning arrester restored to the original state rapidly again, to guarantee system's normal power supply.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (3)
1. the power arrester of an overvoltage protection is characterized in that: comprise piezo-resistance, gas discharge tube, divider resistance, Transient Suppression Diode and overvoltage protection; Wherein, the series connection of described Transient Suppression Diode and divider resistance arranges; Described gas discharge tube with connect after Transient Suppression Diode, divider resistance be arranged in parallel; The setting of connecting with gas discharge tube, Transient Suppression Diode, divider resistance after the parallel connection of described piezo-resistance; Described piezo-resistance further is connected with overvoltage protection.
2. the power arrester of overvoltage protection according to claim 1 is characterized in that: described overvoltage protection, comprise detection control apparatus and switching device, and wherein switching device is connected between civil power and the protected electrical equipment; Wherein relatively control loop comprises integrated resistor, diode and a triode; Described resistance and back-biased diode are connected in turn between the base stage and emitter of triode.
3. the power arrester of overvoltage protection according to claim 1, it is characterized in that: the concrete number of described gas discharge tube is two, these two gas discharge tubes are arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220295987 CN202797931U (en) | 2012-06-21 | 2012-06-21 | Power lightning arrester for overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220295987 CN202797931U (en) | 2012-06-21 | 2012-06-21 | Power lightning arrester for overvoltage protection device |
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| Publication Number | Publication Date |
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| CN202797931U true CN202797931U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220295987 Expired - Fee Related CN202797931U (en) | 2012-06-21 | 2012-06-21 | Power lightning arrester for overvoltage protection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098748A (en) * | 2014-07-25 | 2015-11-25 | 厦门赛尔特电子有限公司 | Surge protector and method for enhancing temporary overvoltage endurance thereof |
| CN110783906A (en) * | 2018-07-26 | 2020-02-11 | Ripd知识产权发展有限公司 | Surge protection device, circuit, module and system comprising surge protection device, circuit and module |
| CN110988444A (en) * | 2019-11-21 | 2020-04-10 | 深圳供电局有限公司 | Zinc oxide lightning arrester voltage divider, overvoltage detection lightning arrester and detection method |
| CN111398850A (en) * | 2020-03-30 | 2020-07-10 | 广东电网有限责任公司 | Fault point simulation device and method designed according to discharge characteristics of power cable fault point |
-
2012
- 2012-06-21 CN CN 201220295987 patent/CN202797931U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098748A (en) * | 2014-07-25 | 2015-11-25 | 厦门赛尔特电子有限公司 | Surge protector and method for enhancing temporary overvoltage endurance thereof |
| CN105098748B (en) * | 2014-07-25 | 2018-02-06 | 厦门赛尔特电子有限公司 | A kind of Surge Protector and the method for lifting its temporary overvoltage tolerance |
| CN110783906A (en) * | 2018-07-26 | 2020-02-11 | Ripd知识产权发展有限公司 | Surge protection device, circuit, module and system comprising surge protection device, circuit and module |
| CN110988444A (en) * | 2019-11-21 | 2020-04-10 | 深圳供电局有限公司 | Zinc oxide lightning arrester voltage divider, overvoltage detection lightning arrester and detection method |
| CN111398850A (en) * | 2020-03-30 | 2020-07-10 | 广东电网有限责任公司 | Fault point simulation device and method designed according to discharge characteristics of power cable fault point |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20160621 |
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| CF01 | Termination of patent right due to non-payment of annual fee |