CN205489436U - Lightning protection device for power supply - Google Patents
Lightning protection device for power supply Download PDFInfo
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- CN205489436U CN205489436U CN201520797003.2U CN201520797003U CN205489436U CN 205489436 U CN205489436 U CN 205489436U CN 201520797003 U CN201520797003 U CN 201520797003U CN 205489436 U CN205489436 U CN 205489436U
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- lightning protection
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Abstract
The utility model provides a detection, warning circuit are connected with back level lightning protection circuit between zero line and the live wire that lightning protection device for power supply is equipped with zero line lightning protection circuit, live wire lightning protection circuit and links to each other with it in the casing back level lightning protection circuit includes the fuse of one end connection on the live wire, and two parallelly connected piezo -resistor VR5, VR6 are connected to the fuse other end to the zero line is connected to the piezo -resistor VR5, the VR6 other end that ally oneself with. The protection method of the parallelly connected ground connection of the piezo -resistor that compares, there is corresponding fuse protection on each grade lightning protection circuit, after certain one -level protection was lost efficacy, fusing of metal, can not be influential to the power route, make system's normal operating, especially, be connected with back level lightning protection circuit between zero line and the live wire, guaranteed that voltage difference between live wire and the zero line is not higher than the value of settlement, if pressure differential is higher than this value, then absorb surge energy on release live wire or the zero line to the electric wire netting in, the function of lightning protection device protection has further been ensured.
Description
Technical field
This utility model relates to power supply technical field, particularly to a kind of lightning protection for power supply.
Background technology
Lightning protection for power supply (SPD) has another name called spark gap, Surge Protector, surge protector, is one the most frequently used in Surge Protector, is primarily directed to the surge protection selected by power-supply system.This information age, computer network and communication apparatus are more and more accurate, the requirement of its working environment is more and more higher, and the transient overvoltage of thunder and lightning and large electric equipment can pass through the circuits such as power supply, antenna, radio signal transceiver the most frequently and invade indoor electric equipment and the network equipment, cause equipment or component damage, casualties, transmission or the data stored are interfered or lose, electronic equipment is even made to produce misoperation or temporary transient paralysis, system-down, data-transmission interruptions, LAN or even wide area network are destroyed.Its harm is startling, and indirect loss is generally far larger than direct economic loss.Lightning protection for power supply is through modern electricity and other technology prevents by the equipment in being struck by lightning.The a large amount of pulse energy short circuits using lightning protection for power supply can produce because of lightning induction on release circuit within the shortest time are released to the earth, the potential difference between the reduction each interface of equipment, thus the equipment in protection circuit.
Power protection ranking score level Four, the first order protection of power supply: before the distribution box of total input-wire；Before the second class protection of power supply: UPS or distribution electric box；The three-level protective of power supply: before visual plant distribution system；The level Four protection of power supply: before electronic device works power supply.Be generally used for AC220V power lightning protection three grades protection lightning protection device is used mostly is the integrated lightning protection device moulding dress; this lightning protection device principle is that varistor earth protects, and single-stage is protected, and effect is general; and have certain pressure-sensitive risk breakdown, power supply is put lightning surge protection limited.Relying on professional factory to be packaged on producing, cost is high.
Utility model content
This utility model purpose is to provide a kind of lightning protection for power supply; what the lightning protection device protected to be generally used for AC220V power lightning protection three grades in solution prior art was used mostly is the integrated lightning protection device moulding dress; this lightning protection device principle is that varistor earth protects; single-stage is protected; effect is general, and has certain pressure-sensitive risk breakdown, power supply is put lightning surge protection limited; professional factory is relied on to be packaged on producing, the technical bug that cost is high.
The technical solution of the utility model is achieved in that
A kind of lightning protection for power supply; including housing; zero line lightning protection circuit, live wire lightning protection circuit and the detection being attached thereto, warning circuit it is provided with in housing; this detection, warning circuit include that fire, zero line polarity automatic detection circuit, earth lead automatic detection circuit and lightning protection fault alarm circuit, its moderate heat, zero line polarity automatic detection circuit are connected between live wire and ground wire；Earth lead automatic detection circuit is connected to zero line lightning protection circuit, the outfan of live wire lightning protection circuit, and connects with live wire, zero line and ground wire respectively；Lightning protection fault alarm circuit is connected to zero line lightning protection circuit, the input of live wire lightning protection circuit, housing two ends are connected to inlet wire insert row and outlet insert row, wherein it is connected between zero line with live wire and has rear class lightning protection circuit, described rear class lightning protection circuit includes the electric fuse that one end is connected on live wire, the electric fuse other end connects two varistor VR5 in parallel, VR6, varistor VR5 in parallel, the VR6 other end connects zero line, described zero line lightning protection circuit and live wire lightning protection circuit include gas-discharge tube, described gas-discharge tube discharge end connects ground wire, and discharge end is respectively by two safety electric capacity CY1, CY2 connects zero line and live wire.
Preferably, described fire, zero line polarity automatic detection circuit include the diode D3 mutually concatenated, resistance R3, resistance R4, LED Y and are attempted by diode D4 on LED Y, and this circuit respectively by diode D3 and and the LED Y, the diode D4 that connect be connected with live wire and ground wire.
Preferably; described earth lead automatic detection circuit includes the diode D1 mutually concatenated, resistance R1, resistance R2, LED G and is attempted by diode D2 on LED G; and this circuit respectively by diode D1 and and the LED G, the diode D2 that connect be connected to zero line lightning protection circuit, the outfan of live wire lightning protection circuit; and connect with live wire, zero line and ground wire respectively.
Preferably; described live wire lightning protection circuit, include slow-melting fuse F1; slow-melting fuse F1 one end connects live wire; the other end is in series with varistor VR1, VR2 parallel with one another; described zero line lightning protection circuit, include slow-melting fuse F2; slow-melting fuse F2 one end connects zero line, and the other end is in series with varistor VR3, VR4 parallel with one another, and after parallel connection, varistor VR3, VR4 after varistor VR1, VR2 and parallel connection connects the input of gas-discharge tube jointly.
Preferably; described lightning protection fault alarm circuit includes the diode D5 mutually concatenated, resistance R5, resistance R6, LED R and is attempted by diode D6 on LED R, and this circuit respectively by diode D5 and and the LED R, the diode D6 that connect be connected to zero line lightning protection circuit, the input of live wire lightning protection circuit.
Compared with prior art, this utility model has a following beneficial effect:
Lightning protection for power supply of the present utility model; compare the protection method of varistor earth; the electric fuse protection of correspondence is had on every one-level lightning protection circuit; when after certain one-level shielding failure; blown fuse; power path will not be had an impact; make system properly functioning; especially it is connected between zero line with live wire and has rear class lightning protection circuit; ensure that the value that the voltage difference between live wire and zero line not higher than sets; if pressure reduction is higher than this value, then, in the surge energy that absorption is released on live wire or zero line to electrical network, further ensure that the function that lightning protection device protects；It addition, the discharge end of gas-discharge tube connects zero line and live wire by two safety electric capacity respectively, further avoid stronger lightning surge to zero line and the damage of live wire.
Accompanying drawing explanation
Fig. 1 is the shell mechanism schematic diagram of this utility model lightning protection for power supply；
Fig. 2 is the circuit theory diagrams of this utility model lightning protection for power supply.
In figure: housing 10, zero line lightning protection circuit 20, live wire lightning protection circuit 30, detection, warning circuit 40, fire, zero line polarity automatic detection circuit 41, earth lead automatic detection circuit 42, lightning protection fault alarm circuit 43, rear class lightning protection circuit 50.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, this utility model is clearly and completely described.
As shown in Figure 1 and Figure 2; a kind of lightning protection for power supply; live wire L, zero line N and ground wire PE is all comprised including housing 10, inlet wire port J1 and outlet port J2; zero line lightning protection circuit 20, live wire lightning protection circuit 30 and the detection being attached thereto, warning circuit 40 it is provided with in housing 10; this detection, warning circuit 40 include that fire, zero line polarity automatic detection circuit 41, earth lead automatic detection circuit 42 and lightning protection fault alarm circuit 43, its moderate heat, zero line polarity automatic detection circuit 41 are connected between live wire and ground wire；Earth lead automatic detection circuit 42 is connected to zero line lightning protection circuit 20, the outfan of live wire lightning protection circuit 30, and connects with live wire, zero line and ground wire respectively；nullLightning protection fault alarm circuit 43 is connected to zero line lightning protection circuit 20、The input of live wire lightning protection circuit 30，Housing two ends are connected to inlet wire insert row and outlet insert row，Wherein it is connected between zero line with live wire and has rear class lightning protection circuit 50，Described rear class lightning protection circuit 50 includes the electric fuse that one end is connected on live wire，The electric fuse other end connects two varistor VR5 in parallel、VR6，Varistor VR5 in parallel、The VR6 other end connects zero line，Ensure that the value that the voltage difference between live wire and zero line not higher than sets，If pressure reduction is higher than this value，Then absorb the surge energy released on live wire or zero line in electrical network，Further ensure that the function that lightning protection device protects，Described zero line lightning protection circuit 20 and live wire lightning protection circuit 30 include gas-discharge tube，Described gas-discharge tube discharge end connects ground wire，And discharge end is respectively by two safety electric capacity CY1、CY2 connects zero line and live wire，When there is moment lightning impulse，Induction lightening passes through RV1 after live wire end is by F1、RV2 (in parallel) and GF instant earthing；Induction lightening is in parallel by RV3, RV4 after zero line side is by F2) and GF instant earthing, reach the purpose of electric discharge.
Described fire, zero line polarity automatic detection circuit 41 include the diode D3 mutually concatenated, resistance R3, resistance R4, LED Y and are attempted by diode D4 on LED Y, and this circuit respectively by diode D3 and and the LED Y, the diode D4 that connect is connected with live wire and ground wire, described fire, zero line polarity automatic detection circuit 41 are used for detecting that the supply line of user is fiery, zero line wiring is the most correct.
Described earth lead automatic detection circuit 32 includes the diode D1 mutually concatenated, resistance R1, resistance R2, LED G and is attempted by diode D2 on LED G; and this circuit respectively by diode D1 and and the LED G, the diode D2 that connect be connected to zero line lightning protection circuit, the outfan of live wire lightning protection circuit; and respectively with live wire; zero line and ground wire connect; whether described earth lead automatic detection circuit (32) is connected to ground wire for the supply line detecting user, and earth lead is the most correct.
Described live wire lightning protection circuit, include slow-melting fuse F1; slow-melting fuse F1 one end connects live wire; the other end is in series with varistor VR1, VR2 parallel with one another; described zero line lightning protection circuit, include slow-melting fuse F2; slow-melting fuse F2 one end connects zero line; the other end is in series with varistor VR3, VR4 parallel with one another, and after parallel connection, varistor VR3, VR4 after varistor VR1, VR2 and parallel connection connects the input of gas-discharge tube jointly.
Described lightning protection fault alarm circuit 43 includes the diode D5 mutually concatenated, resistance R5, resistance R6, LED R and be attempted by diode D6 on LED R, and this circuit respectively by diode D5 and and the LED R that connects, diode D6 is connected to zero line lightning protection circuit, the input of live wire lightning protection circuit, described lightning protection fault alarm circuit 33 is used for detecting the most normal effectively work of lightning protection circuit, when varistor normally works, varistor VR1, VR2, VR3, the infinite of VR4, be equivalent to open circuit, now, LED R conducting is shinny；When varistor VR1, VR2, VR3, VR4 lost efficacy (short-circuit), slow-melting fuse F1 or F2 can disconnect automatically, and now LED R both end voltage unsettled LEDR lamp goes out；By the bright of LED R or go out, to realize the most normal effectively work of monitoring lightning protection circuit.
Structure the most of the present utility model and regulation process understand, the lightning protection for power supply of utility model, compare the protection method of varistor earth, the electric fuse protection of correspondence is had on every one-level lightning protection circuit, when after certain one-level shielding failure, blown fuse, power path will not be had an impact, make system properly functioning, especially it is connected between zero line with live wire and has rear class lightning protection circuit, ensure that the value that the voltage difference between live wire and zero line not higher than sets, if pressure reduction is higher than this value, then absorb the surge energy released on live wire or zero line in electrical network, further ensure that the function that lightning protection device protects；It addition, the discharge end of gas-discharge tube connects zero line and live wire by two safety electric capacity respectively, further avoid stronger lightning surge to zero line and the damage of live wire.
Claims (5)
1. a lightning protection for power supply; including housing (10); it is characterized in that; zero line lightning protection circuit (20), live wire lightning protection circuit (30) and the detection being attached thereto, warning circuit (40) it is provided with in housing (10); this detection, warning circuit (40) include that fire, zero line polarity automatic detection circuit (41), earth lead automatic detection circuit (42) and lightning protection fault alarm circuit (43), its moderate heat, zero line polarity automatic detection circuit (41) are connected between live wire and ground wire；Earth lead automatic detection circuit (42) is connected to zero line lightning protection circuit (20), the outfan of live wire lightning protection circuit (30), and connects with live wire, zero line and ground wire respectively；Lightning protection fault alarm circuit (43) is connected to zero line lightning protection circuit (20), the input of live wire lightning protection circuit (30), housing two ends are connected to inlet wire insert row and outlet insert row, wherein it is connected between zero line with live wire and has rear class lightning protection circuit (50), described rear class lightning protection circuit (50) includes the electric fuse that one end is connected on live wire, the electric fuse other end connects two varistor VR5 in parallel, VR6, varistor VR5 in parallel, the VR6 other end connects zero line, described zero line lightning protection circuit (20) and live wire lightning protection circuit (30) include gas-discharge tube, described gas-discharge tube discharge end connects ground wire, and discharge end is respectively by two safety electric capacity CY1, CY2 connects zero line and live wire.
2. lightning protection for power supply as claimed in claim 1, it is characterized in that, described fire, zero line polarity automatic detection circuit (41) include the diode D3 mutually concatenated, resistance R3, resistance R4, LED Y and are attempted by diode D4 on LED Y, and this circuit respectively by diode D3 and and the LED Y, the diode D4 that connect be connected with live wire and ground wire.
Lightning protection for power supply the most according to claim 1; it is characterized in that; described earth lead automatic detection circuit (42) includes the diode D1 mutually concatenated, resistance R1, resistance R2, LED G and is attempted by diode D2 on LED G; and this circuit respectively by diode D1 and and the LED G, the diode D2 that connect be connected to zero line lightning protection circuit (20), the outfan of live wire lightning protection circuit (30); and connect with live wire, zero line and ground wire respectively.
Lightning protection for power supply the most according to claim 1; it is characterized in that; described live wire lightning protection circuit (30), include slow-melting fuse F1; slow-melting fuse F1 one end connects live wire; the other end is in series with varistor VR1, VR2 parallel with one another; described zero line lightning protection circuit (20), include slow-melting fuse F2; slow-melting fuse F2 one end connects zero line; the other end is in series with varistor VR3, VR4 parallel with one another, and after parallel connection, varistor VR3, VR4 after varistor VR1, VR2 and parallel connection connects the input of gas-discharge tube jointly.
Lightning protection for power supply the most according to claim 1; it is characterized in that; described lightning protection fault alarm circuit (43) includes the diode D5 mutually concatenated, resistance R5, resistance R6, LED R and is attempted by diode D6 on LED R, and this circuit respectively by diode D5 and and the LED R, the diode D6 that connect be connected to zero line lightning protection circuit (20), the input of live wire lightning protection circuit (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797003.2U CN205489436U (en) | 2015-10-14 | 2015-10-14 | Lightning protection device for power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520797003.2U CN205489436U (en) | 2015-10-14 | 2015-10-14 | Lightning protection device for power supply |
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| Publication Number | Publication Date |
|---|---|
| CN205489436U true CN205489436U (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520797003.2U Active CN205489436U (en) | 2015-10-14 | 2015-10-14 | Lightning protection device for power supply |
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| Country | Link |
|---|---|
| CN (1) | CN205489436U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233352A (en) * | 2018-01-25 | 2018-06-29 | 深圳市崧盛电子股份有限公司 | A kind of lightning protection device |
-
2015
- 2015-10-14 CN CN201520797003.2U patent/CN205489436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233352A (en) * | 2018-01-25 | 2018-06-29 | 深圳市崧盛电子股份有限公司 | A kind of lightning protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cai Huasu Inventor after: Liu Zhiru Inventor after: Yang Yuanbing Inventor before: Zou Qiurong Inventor before: Liu Zhiru |
|
| CB03 | Change of inventor or designer information |