CN106026065A

CN106026065A - Bridge structure surge protection device

Info

Publication number: CN106026065A
Application number: CN201610587489.6A
Authority: CN
Inventors: 代德志; 雷成勇; 阮建中; 杨国华
Original assignee: SICHUAN ZHONGGUANG LIGHTNING PROTECTION TECHNOLOGIES Co Ltd
Current assignee: SICHUAN ZHONGGUANG LIGHTNING PROTECTION TECHNOLOGIES Co Ltd
Priority date: 2016-07-22
Filing date: 2016-07-22
Publication date: 2016-10-12
Anticipated expiration: 2036-07-22
Also published as: CN106026065B

Abstract

The invention discloses a bridge structure surge protection device, which comprises a first terminal, a second terminal, a third terminal, a first voltage dependent resistor, a first gas discharge tube, a second voltage dependent resistor and a second gas discharge tube, and is characterized in that a first end of the first voltage dependent resistor is connected with the first terminal, a second end of the first voltage dependent resistor is connected with a first end of the first gas discharge tube, and a second end of the first gas discharge tube is connected with the second terminal; a first end of the second voltage dependent resistor is connected with the second terminal, a second end of the second voltage dependent resistor is connected with a first end of the second gas discharge tube, and a second end of the second gas discharge tube is connected with the third terminal; and a common end of the first voltage dependent resistor and the first gas discharge tube is connected with a common end of the second voltage dependent resistor and the second gas discharge tube.

Description

A kind of bridge architecture surge protector

Technical field

The present invention relates to surge protector field, particularly relate to a kind of bridge architecture surge protector.

Background technology

Along with the development of lightning protection industry, surge protector (surge protective devices, SPD) many protected modes are moved towards from single protected mode.Such as: single phase industrial frequence alternating current circuit Protected mode has: the protection between circuit L (phase line) and circuit N (neutral conductor), circuit L Protection between (phase line) and circuit PE (ground wire) and circuit N (neutral conductor) and circuit Protection between PE (ground wire)；The most such as: three-phase main-frequency ac power supply system circuit, protection mould Formula has: the protection between circuit L1 (phase line) and circuit N (neutral conductor), circuit L2 (phase line) And the protection between circuit N (neutral conductor), circuit L3 (phase line) and circuit N (neutral conductor) Between protection and circuit N (neutral conductor) and circuit PE (ground wire) between protection；Example again As: DC power-supply system circuit, protected mode has: circuit DC+ (direct-flow positive pole line) and circuit Protection, circuit DC+ (direct-flow positive pole line) and circuit PE (between DC-(direct current negative line) Line) between protection, guarantor between circuit DC-(direct current negative line) and circuit PE (ground wire) Protect；The most such as: signal line, protected mode has: circuit L1 (holding wire) and circuit L2 (letter Number line) between protection, circuit L2 (holding wire) and circuit PE (ground wire) between protection, Protection between circuit L2 (holding wire) and circuit PE (ground wire).

Existing scheme (as a example by this sentences the protection of single phase industrial frequence ac power supply system multi-mode) is such as Figure 12 Shown in: L-N protected mode by the first surge protector SPD1 (by varistor and gas-discharge tube Be composed in series) protect, N-PE protected mode by the second surge protector SPD2 (by pressure-sensitive Resistance and gas-discharge tube are composed in series) to protect, L-PE protected mode is then by the first surge Protector SPD1 and the second surge protector SPD1 tandem compound are the 3rd surge protector " SPD3 " protects, for L-PE protected mode: SPD3 is equivalent to SPD1 and SPD2 Tandem compound, then in L-PE protected mode: the quantity of varistor and gas-discharge tube is The varistor of SPD1, SPD2 and gas-discharge tube quantity sum, and the varistor connected and Gas-discharge tube quantity is the most, then start voltage the highest, thus reduce the electrical of surge protector Energy.

Summary of the invention

It is an object of the invention to provide a kind of bridge architecture multilamellar gap-type surge protector, be used for as work Cheng Yingyong provides the protection of overvoltage multi-mode.

For solving above-mentioned technical problem, the present invention provides a kind of bridge architecture multilamellar clearance type surge protection Device, including: the first terminal, the second terminal, the 3rd terminal, the first varistor, the first gas Discharge tube, the second varistor and the second gas-discharge tube；

First end of described first varistor is connected with the first terminal, described first varistor Second end is connected with the first end of described first gas-discharge tube, the of described first gas-discharge tube Two ends are connected with described second terminal；

First end of described second varistor and the second terminal connect, described second varistor Second end is connected with the first end of described second gas-discharge tube, the of described second gas-discharge tube Two ends are connected with described 3rd terminal；

The common port of described first varistor and described first gas-discharge tube is second pressure-sensitive with described The common port of resistance and described second gas-discharge tube connects.

Further, described first varistor and the common port of described first gas-discharge tube and institute The common port stating the second varistor and described second gas-discharge tube is connected by the first wire.

Further, described first varistor and the common port of described first gas-discharge tube and institute State the common port of the second varistor and described second gas-discharge tube by the 3rd varistor even Connect.

Further, described first varistor and the common port of described first gas-discharge tube and institute The common port stating the second varistor and described second gas-discharge tube is connected by the first fuse.

Further, described first varistor and the common port of described first gas-discharge tube and institute State the common port of the second varistor and described second gas-discharge tube by the 3rd gas-discharge tube even Connect.

Further, described bridge architecture surge protector also includes indicating circuit, described instruction electricity First end on road is connected with the first terminal, and the second end of described indicating circuit and the second terminal connect.

Further, described bridge architecture surge protector also includes the second fuse and the 3rd fusing Device；

Specifically, described second fuse is serially connected in described the first terminal and described first varistor Between；Described 3rd fuse is serially connected between described second terminal and described second varistor.

Further, described bridge architecture surge protector also includes that the first disconnector and second departs from Device；

Described first disconnector is serially connected between described the first terminal and described first varistor；

Described second disconnector is serially connected between described second terminal and described second varistor.

Further, described bridge architecture surge protector also includes the 4th varistor；

First end of described 4th varistor and described the first terminal and the first varistor public End connection, the second end of described 4th varistor and described second terminal and the second varistor Common port connects.

Further, described bridge architecture surge protector also includes the 4th gas-discharge tube；

First end of described 4th gas-discharge tube and described second terminal and the first gas-discharge tube Common port connects, the second end of described 4th gas-discharge tube and described 3rd terminal and the second gas Discharge tube common port connects.

Further, described bridge architecture surge protector also include the 5th gas-discharge tube, the 6th Gas-discharge tube, the second capacitor and the 3rd capacitor；

First end of described 5th gas-discharge tube connects with the second end of described first gas-discharge tube Connecing, the second end of described 5th gas-discharge tube is connected with the first end of described 6th gas-discharge tube, Second end of described 6th gas-discharge tube is connected with described second terminal；

First end of described second capacitor is put with described first gas-discharge tube and described 5th gas The common port of fulgurite connects, the second end of described 3rd capacitor and described 5th gas-discharge tube and The common port of described 6th gas-discharge tube connects, the second end of described second capacitor and described the It is connected with described second terminal after second end of three capacitors knot.

Further, described first gas-discharge tube and the nominal spark of described second gas-discharge tube Discharge voltage difference is less than 200V, described first varistor and the nominal of described second varistor Pressure sensitive voltage difference is less than 200V.

Further, described nominal spark discharge voltage is more than described nominal varistor voltage, and described Nominal spark discharge voltage is less than 200V with the difference of described nominal varistor voltage.

Beneficial effect:

Bridge architecture surge protector of the present invention, the circuit being applied under many protected modes is protected Protect.Such as: single phase industrial frequence alternating current circuit is protected by this invention, its protected mode has L-N to protect Protect pattern, N-PE protected mode, L-PE protected mode, the wherein electricity between L-N protected mode Subset is protected by the first surge protector SPD1, and the electronics between N-PE protected mode sets For being protected by the second surge protector SPD2, and L-PE protected mode is by by L-N The forward part element that wire under protected mode connects is connected with the wire under N-PE protected mode One new " surge protector SPD3 " of rear section element composition, this new " surge protection Device SPD3 " for protecting the electronic equipment under L-PE protected mode.

1, clearly the lightning protection component of new " surge protector " of the present invention less than being protected by L-N The quantity being together in series with all lightning protection components under N-PE protected mode under pattern, therefore this surge is protected The startup voltage protecting device is lower, and therefore the electrical property of the surge protector of the present invention is more preferable.

2, the bridge architecture surge protector of the present invention, for the surge protection of L-N protected mode Device is put pipe V1 by original varistor RV1 one gas of series connection and is become a pressure-sensitive electricity (parallel branch is that a gas puts pipe V1 and a pressure-sensitive electricity to resistance RV1 one parallel branch of series connection The parallel connection of resistance RV2), it is clear that the L-N protected mode after change is equivalent to the basis at V1 On a how discharge path, in like manner, N-PE protected mode is equivalent on the basis of RV2 many One discharge path, releases for this parameter accordingly, for surge, and the effect of the present invention is more Excellent.

3, L-N protected mode and N-PE protected mode in the bridge architecture surge protector of the present invention Between part lightning protection component (such as: varistor RV1, gas-discharge tube V2) difference protect Participate in work, i.e. surge protector internal components during protecting the surge protection of pattern and can obtain weight Multiple use, therefore devices use rate is higher.

Accompanying drawing explanation

Fig. 1 is the basic electrical schematic diagram of the present invention；

Fig. 2 is the 1st kind of embodiment electrical schematic diagram of the present invention；

Fig. 3 is the 2nd kind of embodiment electrical schematic diagram of the present invention；

Fig. 4 is the 3rd kind of embodiment electrical schematic diagram of the present invention；

Fig. 5 is the 4th kind of embodiment electrical schematic diagram of the present invention；

Fig. 6 is the 5th kind of embodiment electrical schematic diagram of the present invention；

Fig. 7 is the 6th kind of embodiment electrical schematic diagram of the present invention；

Fig. 8 is the 7th kind of embodiment electrical schematic diagram of the present invention；

Fig. 9 is the 8th kind of embodiment electrical schematic diagram of the present invention；

Figure 10 is the 9th kind of embodiment electrical schematic diagram of the present invention；

Figure 11 is the 10th kind of embodiment electrical schematic diagram of the present invention；

Figure 12 is the arrangements figure of existing single phase industrial frequence alternating current circuit；

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention It is clearly and completely described, it is clear that described embodiment is only that a part of the present invention is real Execute example rather than whole embodiment.Based on the embodiment in the present invention, ordinary skill people Member under not making creative work premise, the every other embodiment obtained, broadly fall into this Invention protection domain.

Basic circuit structure such as Fig. 1 institute of a kind of bridge architecture surge protector of the present invention Show.The first terminal, the second terminal, the 3rd terminal, the first varistor RV1, the first gas are put Fulgurite V1, the second varistor RV2 and the second gas-discharge tube V2；

First end of described first varistor RV1 is connected with the first terminal, described first pressure-sensitive electricity Second end of resistance RV1 is connected with first end of described first gas-discharge tube V1, described first gas Second end of body discharge tube V1 and the second terminal connect；

First end of described second varistor RV2 and the second terminal connect, described second pressure-sensitive electricity Second end of resistance RV2 is connected with first end of described second gas-discharge tube V2, described second gas Second end of body discharge tube V2 and the 3rd terminal connect；

Described first varistor RV1 and the common port a of described first gas-discharge tube V1 and institute State the common port b of the second varistor RV2 and described second gas-discharge tube V2 by wire even Connect.

Specifically, the protection circuit between the first terminal and the second terminal (for ease of describing, is referred to as It is the first protection circuit) it is made up of first one parallel branch of varistor RV1 series connection, (in parallel Prop up route the first gas-discharge tube V1 and the second varistor RV2 to compose in parallel)；

(for ease of describing, referred to as second protects protection circuit between second terminal and the 3rd terminal Protection circuit) by second gas-discharge tube V2 series connection one parallel branch form, (parallel branch by First gas-discharge tube V1 and the second varistor RV2 composes in parallel)；

(for ease of describing, the referred to as the 3rd protects protection circuit between the first terminal and the 3rd terminal Protection circuit) it is made up of the first varistor RV1 second gas-discharge tube V2 that connects；

It is pointed out here that in following example, the first varistor RV1 and the second varistor RV2 Nominal varistor voltage scope be 18V～1800V, the first gas-discharge tube V1, the second gas are put The nominal spark discharge voltage scope of fulgurite V2 is 70V～3500V.

It should be noted that the nominal spark discharge voltage of the first gas-discharge tube V1 can be more than the The nominal spark discharge voltage of two gas-discharge tube V2, but difference is less than 200V, or the first gas The nominal spark discharge voltage of body discharge tube V1 is smaller than the nominal spark of the second gas-discharge tube V2 Discharge voltage, but difference is less than 200V；First varistor RV1 nominal varistor voltage can be more than The nominal varistor voltage of the second varistor RV2, but difference is less than 200V, or first is pressure-sensitive Resistance RV1 nominal varistor voltage is smaller than the nominal varistor voltage of the second varistor RV2, but Difference is less than 200V.

Preferably, the first varistor RV1 and the nominal varistor voltage of the second varistor RV2 Scope is 330V～750V, the first gas-discharge tube V1, the nominal fire of the second gas-discharge tube V2 Flower discharge voltage range 350V～800V；

Specifically, when varistor and gas-discharge tube parameter select, described nominal spark discharge electricity Pressure and nominal varistor voltage are all higher than supply voltage peak value, and nominal spark discharge voltage is more than nominal Pressure sensitive voltage, but difference is less than 200V, such as nominal varistor voltage value 330V, then nominal Spark discharge voltage value can be 350V；The most such as nominal varistor voltage value 470V, then nominal Spark discharge voltage value can be 500V.

Embodiment 1

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 2: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2 and the second gas-discharge tube V2；

Specifically, first end of the first varistor RV1 is connected with the first terminal, the first pressure-sensitive electricity First end of resistance RV1 the second end and the first gas-discharge tube V1 connects, the first gas-discharge tube V1 The second end and the second terminal connect；

Specifically, first end of the second varistor RV2 and the second terminal connect, the second pressure-sensitive electricity Second end and second gas-discharge tube V2 first end of resistance RV2 connect, the second gas-discharge tube V2 The second end and the 3rd terminal connect；

Further, the common port a of the first varistor RV1 and the first gas-discharge tube V1 with The common port b of the second varistor RV2 and the second gas-discharge tube V2 is connected by wire.

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) by first varistor RV1 series connection one parallel branch form, (parallel branch by First gas-discharge tube V1 and the second varistor RV2 composes in parallel)；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) it is made up of second one parallel branch of gas-discharge tube V2 series connection, (parallel branch is by the One gas-discharge tube V1 and the second varistor RV2 composes in parallel)；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) it is made up of the first varistor RV1 second gas-discharge tube V2 that connects；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection The first varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2 After conducting becomes low-resistance, form two overvoltage leadage circuits (one along the first varistor RV1 Forming leadage circuit with the first gas-discharge tube V1 direction, another is along the first varistor RV1 Leadage circuit is formed with the second varistor RV2 direction), thus will scurry between circuit L-N Surge be limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line and N The protection of electronic equipment between line.When there is surge in circuit between N terminal and PE terminal, the Second varistor RV2, the first gas-discharge tube V1, the second gas-discharge tube in two protection circuits After V2 conducting becomes low-resistance, form two overvoltage leadage circuits (one along the second varistor RV2 and the second gas-discharge tube V2 direction form leadage circuit, and another is along the first gas discharge Pipe V1 and the second gas-discharge tube V2 direction form leadage circuit), thus circuit will be scurried into Surge between N-PE is limited in the voltage range that electronic equipment can bear, it is achieved to being connected to The protection of electronic equipment between N line and PE line；There is electricity in circuit between L terminal and PE terminal When gushing, in the 3rd protection circuit, the first varistor RV1, the second gas-discharge tube V2 conducting become Becoming after low-resistance, formed along the first varistor RV1 and the second gas-discharge tube V2 direction is the most electric Pressure leadage circuit, thus the surge scurried between circuit L-PE is limited in electronic equipment institute energy In the voltage range born, it is achieved to being connected to the protection of electronic equipment between L line and PE line.

Embodiment 2

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 3: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2 and the 3rd pressure Quick resistance RV3；

Specifically, first end of the first varistor RV1 is connected with the first terminal, the first pressure-sensitive electricity Second end of resistance RV1 and first end of the first gas-discharge tube V1 connect, the first gas-discharge tube Second end of V1 and the second terminal connect；

Specifically, first end of the second varistor RV2 and the second terminal connect, the second pressure-sensitive electricity Second end of resistance RV2 and first end of the second gas-discharge tube V2 connect, the second gas-discharge tube Second end of V2 and the 3rd terminal connect；

Further, first end of the 3rd varistor RV3 and the first varistor RV1 and The common port a of one gas-discharge tube V1 connects, second end and second of the 3rd varistor RV3 The common port b of varistor RV2 and the second gas-discharge tube V2 connects.

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) by first varistor RV1 series connection one parallel branch form, (parallel branch by Second varistor RV2 and the 3rd varistor RV3 series connection after again with the first gas-discharge tube V1 Compose in parallel)；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) by the second gas-discharge tube V2 connect parallel branch form (parallel branch by First gas-discharge tube V1 and the 3rd varistor RV3 series connection after again with the second varistor RV2 Compose in parallel)；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) depended on by the first varistor RV1, the 3rd varistor RV3 and the second gas-discharge tube V2 Secondary it is composed in series；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection First varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2, After 3rd varistor RV3 conducting becomes low-resistance, form two overvoltage leadage circuit (edges First varistor RV1 and the first gas-discharge tube V1 direction form leadage circuit, another edge First varistor RV1, the 3rd varistor RV3 and the second varistor RV2 direction are formed Leadage circuit), when there is surge in the circuit between N terminal and PE terminal, the second protection electricity Second varistor RV2 in road, the 3rd varistor RV3, the first gas-discharge tube V1, After two gas-discharge tube V2 conductings become low-resistance, form two overvoltage leadage circuit (edges Second varistor RV2 and the second gas-discharge tube V2 direction form leadage circuit, another edge First gas-discharge tube V1, the 3rd varistor RV3 and the second gas-discharge tube V2 direction are formed Leadage circuit), when there is surge in the circuit between L terminal and PE terminal, the 3rd protection electricity First varistor RV1, the 3rd varistor RV3 and the second gas-discharge tube V2 conducting in road After becoming low-resistance, formed along the first varistor RV1, the 3rd varistor RV3 and the second gas The overvoltage leadage circuit in discharge tube V2 direction, thus the surge that will scurry between circuit L-PE It is limited in the voltage range that electronic equipment can bear, it is achieved to being connected between L line and PE line The protection of electronic equipment.

In this embodiment, add the 3rd varistor RV3, can be by changing the 3rd pressure-sensitive electricity Resistance RV3 size regulates circuit parameter, thus affects different leadage circuit earial drainage.Specifically, In one protection circuit, parallel branch is connected by the second varistor RV2 and the 3rd varistor RV3 After compose in parallel with the first gas-discharge tube V1 again.Change the nominal pressure of the 3rd varistor RV3 Quick magnitude of voltage, it is possible to after changing the second varistor RV2 and the 3rd varistor RV3 series connection Total nominal varistor voltage value, thus have impact on the earial drainage of this leadage circuit, it is more conducive to first The coupling of gas-discharge tube V1 parameter.

In this embodiment, the nominal varistor voltage scope of the 3rd varistor RV3 is 18V～1800V.Preferably, the nominal varistor voltage value of the 3rd varistor RV3 is 68V～150V.

Embodiment 3

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 4: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2 and first are molten Disconnected device FU1；

Further, first end of the first fuse FU1 and the first varistor RV1 and first The common port a of gas-discharge tube V1 connects, second end of the first fuse FU1 and second pressure-sensitive The common port b of resistance RV2 and the second gas-discharge tube V2 connects.

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) by first varistor RV1 series connection one parallel branch form, (parallel branch by After second varistor RV2 and the first fuse FU1 series connection again with the first gas-discharge tube V1 also Joint group becomes)；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) it is made up of second one parallel branch of gas-discharge tube V2 series connection, (parallel branch is by the One gas-discharge tube V1 and the first fuse FU1 is in parallel with the second varistor RV2 again after connecting Composition)；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) by the first varistor RV1, the first fuse FU1 and the second gas-discharge tube V2 successively It is composed in series；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection First varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2, After conducting becomes low-resistance, form two overvoltage leadage circuits (one along the first varistor RV1 With first gas-discharge tube V1 direction formed leadage circuit, another along the first varistor RV1, First fuse FU1 and the second varistor RV2 direction form leadage circuit), when N terminal And when there is surge in the circuit between PE terminal, the second varistor RV2 in the second protection circuit, After first gas-discharge tube V1, the second gas-discharge tube V2 conducting become low-resistance, form two mistakes Voltage leadage circuit is (one along the second varistor RV2 and the second gas-discharge tube V2 direction shape Becoming leadage circuit, another is along the first gas-discharge tube V1, the first fuse FU1 and the second gas Body discharge tube V2 direction forms leadage circuit), the circuit between L terminal and PE terminal occurs During surge, the first varistor RV1 and the second gas-discharge tube V2 conducting in the 3rd protection circuit After becoming low-resistance, formed and put along the first varistor RV1, the first fuse FU1 and the second gas The overvoltage leadage circuit in fulgurite V2 direction, thus the surge limit that will scurry between circuit L-PE System is in the voltage range that electronic equipment can bear, it is achieved to being connected between L line and PE line electricity The protection of subset.

In the present embodiment, add the first fuse FU1, the electricity between L terminal and N terminal When surge occurs in road, when there is stream or shorted devices inefficacy in the first protection circuit, the first fuse FU1 fuses, thus has cut off along the first varistor RV1, the first fuse FU1 and the second pressure The leadage circuit in quick resistance RV2 direction, now the first protection circuit is the most only along the first varistor RV1 and the leadage circuit in the first gas-discharge tube V1 direction；Between N terminal and PE terminal Circuit time surge occurs, when the second protection circuit existed stream or shorted devices lost efficacy, first melts Disconnected device FU1 fusing, thus cut off along the first gas-discharge tube V1, the first fuse FU1 and Second gas-discharge tube V2 direction forms leadage circuit, and now the second protection circuit is the most only along the Two varistor RV2 and the leadage circuit in the second gas-discharge tube V2 direction；As L terminal and PE When surge occurs in circuit between terminal, when there is stream or shorted devices inefficacy in the 3rd protection circuit, First fuse FU1 fusing, then the 3rd protection circuit disconnects, thus protects the 3rd protection circuit On components and parts.Further, the 3rd protection circuit return to along the first varistor RV1, First gas-discharge tube V2, the second varistor RV2, the mistake in the second gas-discharge tube V2 direction Voltage leadage circuit.

In this embodiment, the rated current value of the first fuse FU1 is 0.5A～500A.Preferably Ground, the rated current value of the first fuse FU1 is 35A～50A.

Embodiment 4

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 5: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2 and the 3rd gas Body discharge tube V3；

Specifically, second varistor RV2 the first end and the second terminal connect, the second varistor Second end of RV2 and first end of the second gas-discharge tube V2 connect, the second gas-discharge tube V2 The second end and the 3rd terminal connect；

Further, first end of the 3rd gas-discharge tube V3 and the first varistor RV1 and The common port a of one gas-discharge tube V1 connects, second end and second of the 3rd gas-discharge tube V3 The common port b of varistor RV2 and the second gas-discharge tube V2 connects.

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) by first varistor RV1 series connection one parallel branch form, (parallel branch by Second varistor RV2 and the 3rd gas-discharge tube V3 series connection after again with the first gas-discharge tube V1 Compose in parallel)；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) it is made up of second one parallel branch of gas-discharge tube V2 series connection, (parallel branch is by the One gas-discharge tube and the 3rd gas-discharge tube V3 series connection after again with the second varistor joint group Become)；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) by the first varistor RV1, the 3rd gas-discharge tube V3 and the second gas-discharge tube V2 It is sequentially connected in series；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection First varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2, After 3rd gas-discharge tube V3 conducting becomes low-resistance, form two overvoltage leadage circuits (one Leadage circuit is formed along the first varistor RV1 and the first gas-discharge tube V1 direction, another Along the first varistor RV1, the 3rd gas-discharge tube V3 and the second varistor RV2 direction shape Become leadage circuit), when there is surge in the circuit between N terminal and PE terminal, the second protection Second varistor RV2 in circuit, the 3rd gas-discharge tube V3, the first gas-discharge tube V1, After second gas-discharge tube V2 conducting becomes low-resistance, form two overvoltage leadage circuits (one Leadage circuit is formed along the second varistor RV2 and the second gas-discharge tube V2 direction, another Along the first gas-discharge tube V1, the 3rd gas-discharge tube V3 and the second gas-discharge tube V2 direction Form leadage circuit), when surge occurs in the circuit between L terminal and PE terminal, the 3rd protects First varistor RV1, the 3rd gas-discharge tube V3 and the second gas-discharge tube V2 in protection circuit After conducting becomes low-resistance, formed along the first varistor RV1, the 3rd gas-discharge tube V3 and the The overvoltage leadage circuit in two gas-discharge tube V2 directions, thus will scurry between circuit L-PE Surge be limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line and PE The protection of electronic equipment between line.

This embodiment adds the 3rd gas-discharge tube V3, can be by changing the 3rd gas discharge The size of pipe V3 nominal spark discharge voltage value regulates circuit parameter, thus affects difference and release Branch road earial drainage.Specifically, in the first protection circuit parallel branch by the second varistor RV2 and Compose in parallel with the first gas-discharge tube V1 again after three gas-discharge tube V3 series connection.Change the 3rd gas The nominal spark discharge voltage value of body discharge tube V3, it is possible to change the second varistor RV2 with Startup magnitude of voltage total after 3rd gas-discharge tube V3 series connection, thus have impact on this leadage circuit Earial drainage, be more conducive to and the mating of the first gas-discharge tube V1 parameter.

In this embodiment, the nominal spark discharge voltage scope of the 3rd gas-discharge tube V3 70V～3500V.Preferably, the nominal spark discharge voltage scope of the 3rd gas-discharge tube V3 90V～150V.

Embodiment 5

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 6: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2 and instruction electricity Road；

Further, the common port a of the first varistor RV1 and the first gas-discharge tube V1 leads to It is connected by wire with the common port b of the second varistor RV2 and the second gas-discharge tube V2.

In the present embodiment, indicating circuit makes this surge protector possess instruction function, when L terminal And when having alternating current between N terminal, light emitting diode is lighted, then it represents that L terminal and N terminal Between protection circuit be in "on" position, wherein, indicating circuit by fuse FU11, blood pressure lowering electricity Hold C1, bleeder resistance R1, current-limiting resistance R2, commutation diode VD1, protection diode VD2, Light emitting diode VL1, current-limiting inductance L1 form, wherein, and bleeder resistance R1 and decompression capacitor C1 is connected in parallel composition RC circuit, and one end of RC circuit is connected with one end of fuse FU1, The other end of fuse FU1 is connected with L terminal, the other end of RC circuit and current-limiting resistance R2 One end connect, the other end of current-limiting resistance R2 with protection the negative pole of diode VD2, rectification two The positive pole of pole pipe VD1 connects.The negative pole of commutation diode VD1 is with light emitting diode VL1 just Pole connects, and the negative pole of light emitting diode VL1 is connected with the positive pole of protection diode VD2, and with Time and current-limiting inductance L1 one end connect, the other end of current-limiting inductance L1 is connected with N terminal.

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection In circuit, the first varistor RV1, the first gas-discharge tube V1, the second varistor RV2 lead Logical become low-resistance after, is formed two overvoltage leadage circuits (one along the first varistor RV1 with First gas-discharge tube V1 direction forms leadage circuit, another along the first varistor RV1 and Second varistor RV2 direction forms leadage circuit), thus will scurry between circuit L-N Surge is limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line and N line Between the protection of electronic equipment；When there is surge in circuit between N terminal and PE terminal, second Second varistor RV2, the first gas-discharge tube V1, the second gas-discharge tube in protection circuit After V2 conducting becomes low-resistance, form two overvoltage leadage circuits (one along the second varistor RV2 and the second gas-discharge tube V2 direction form leadage circuit, and another is along the first gas discharge Pipe V1 and the second gas-discharge tube V2 direction form leadage circuit), when L terminal and PE terminal Between circuit time surge occurs, the first varistor RV1, the second gas in the 3rd protection circuit After discharge tube V2 conducting becomes low-resistance, formed along the first varistor RV1, the second gas discharge The overvoltage leadage circuit in pipe V2 direction, thus the surge scurried between circuit L-PE is limited In the voltage range that electronic equipment can bear, it is achieved to being connected to electronics between L line and PE line The protection of equipment.

Embodiment 6

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 7: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2, second melt Disconnected device FU2 and the 3rd fuse FU3；

Specifically, first end of the second fuse FU2 is connected with the first terminal, the second fuse Second end of FU2 and first end of the first varistor RV1 connect, the first varistor RV1 The second end and first end of the first gas-discharge tube V1 connect, the of the first gas-discharge tube V1 Two ends and the second terminal connect；

Specifically, first end of the 3rd fuse FU3 and the second terminal connect, the 3rd fuse Second end of FU3 and first end of the second varistor RV2 connect, the second varistor RV2 The second end and first end of the second gas-discharge tube V2 connect, the of the second gas-discharge tube V2 Two ends and the 3rd terminal connect；

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) by the second fuse FU2, the first varistor RV1, a parallel branch successively Being composed in series, wherein, parallel branch is gone here and there by the second varistor RV2 and the 3rd fuse FU3 Compose in parallel with the first gas-discharge tube V1 again after connection；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) it is made up of second one parallel branch of gas-discharge tube V2 series connection, (parallel branch is by the Two varistor RV2 and the 3rd fuse FU3 are in parallel with the first gas-discharge tube V1 again after connecting Composition)；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) by the second fuse FU2, the first varistor RV1 and the second gas-discharge tube V2 successively It is composed in series；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection First varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2, Conducting become low-resistance after, formed two overvoltage leadage circuits (one along the second fuse FU2, First varistor RV1 and the first gas-discharge tube V1 direction form leadage circuit, another edge Second fuse FU2, the first varistor RV1, the second varistor RV2 and the 3rd fuse FU3 direction forms leadage circuit), thus the surge scurried between circuit L-N is limited in electricity In the voltage range that subset can bear, it is achieved to being connected to electronic equipment between L line and N line Protection；When surge occurs in circuit between N terminal and PE terminal, in the second protection circuit Two varistor RV2, the first gas-discharge tube V1, the second gas-discharge tube V2 conducting become low After resistance, form two articles of overvoltage leadage circuits (one article along the 3rd fuse FU3, the second pressure-sensitive electricity Resistance RV2 and the second gas-discharge tube V2 direction form leadage circuit, and another is put along the first gas Fulgurite V1 and the second gas-discharge tube V2 direction form leadage circuit), when L terminal and PE end When there is surge in circuit between son, the first varistor RV1, the second gas in the 3rd protection circuit After body discharge tube V2 conducting becomes low-resistance, formed along the second fuse FU2, the first varistor RV1, the overvoltage leadage circuit in the second gas-discharge tube V2 direction, thus circuit will be scurried into Surge between L-PE is limited in the voltage range that electronic equipment can bear, it is achieved to being connected to The protection of electronic equipment between L line and PE line.

In the present embodiment, add the second fuse FU2 and the 3rd fuse FU3, can play Carry defencive function.Specifically, when there is stream in the first protection circuit or shorted devices lost efficacy, the Two fuse FU2 fusing, thus cut off the first protection circuit, it is to avoid follow current flows through, by This plays overload protection function；When there is stream in the second protection circuit or shorted devices lost efficacy, the Three fuse FU3 fusing, thus cut off the second protection circuit, it is to avoid follow current flows through, by This plays overload protection function；When there is stream in the 3rd protection circuit or shorted devices lost efficacy, the Two fuse FU2 fusing, thus cut off the 3rd protection circuit, it is to avoid follow current flows through, by This plays overload protection function.

In this embodiment, the load current value of the second fuse FU2 and the 3rd fuse FU3 takes all For 0.5A～500A.Preferably, the second fuse FU2 and the rated current of the 3rd fuse FU3 Value is taken as 35A～50A.

Embodiment 7

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 8: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2, first take off From device D1 and the second disconnector D2；

Specifically, first end of the first disconnector D1 is connected with the first terminal, the first disconnector D1 The second end and first end of the first varistor RV1 connect, the of the first varistor RV1 First end of two ends and the first gas-discharge tube V1 connects, second end of the first gas-discharge tube V1 It is connected with the second terminal；

Specifically, first end of the second disconnector D2 and the second terminal connect, the second disconnector D2 The second end and first end of the second varistor RV2 connect, the of the second varistor RV2 First end of two ends and the second gas-discharge tube V2 connects, second end of the second gas-discharge tube V2 It is connected with the 3rd terminal；

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) gone here and there successively by the first disconnector D1, the first varistor RV1, a parallel branch Joint group becomes, wherein, after parallel branch is connected by the second disconnector D2 and the second varistor RV2 Compose in parallel with the first gas-discharge tube V1；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) it is made up of second one parallel branch of gas-discharge tube V2 series connection, wherein, parallel branch After being connected by the second disconnector D2 and the second varistor RV2 again with the first gas-discharge tube V1 Compose in parallel；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) gone here and there successively by the first disconnector D1, the first varistor RV1 and the second gas-discharge tube V2 Joint group becomes；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection First varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2, After conducting becomes low-resistance, formed two articles of overvoltage leadage circuits (one article along the first disconnector D1, the One varistor RV1 and the first gas-discharge tube V1 direction form leadage circuit, and another article is along the One disconnector D1, the first varistor RV1, the second varistor RV2 and the second disconnector D2 Direction forms leadage circuit), thus the surge scurried between circuit L-N is limited in electronics and sets In the standby voltage range that can bear, it is achieved to being connected to the protection of electronic equipment between L line and N line； When surge occurs in circuit between N terminal and PE terminal, in the second protection circuit, second is pressure-sensitive After resistance RV2, the first gas-discharge tube V1, the second gas-discharge tube V2 conducting become low-resistance, Form two overvoltage leadage circuits (one along the second disconnector D2, the second varistor RV2 Forming leadage circuit with the second gas-discharge tube V2 direction, another is along the first gas-discharge tube V1 Leadage circuit is formed with the second gas-discharge tube V2 direction), between L terminal and PE terminal When there is surge in circuit, the first varistor RV1, the second gas-discharge tube in the 3rd protection circuit V2 conducting become low-resistance after, formed along the first disconnector D1, the first varistor RV1, second The overvoltage leadage circuit in gas-discharge tube V2 direction, thus will scurry between circuit L-PE Surge is limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line and PE The protection of electronic equipment between line.

In the present embodiment, add the first disconnector D1 and the second disconnector D2, overload can be played Defencive function.Specifically, when the first protection circuit has electric current to flow through, varistor RV1 generates heat, Its heat passes to the first disconnector D1, and the solder joint in the first disconnector D1 is heated thawing, then break Open the first protection circuit, thus play overload protection function；When the second protection circuit has electric current to flow through Time, varistor RV2 generates heat, and its heat passes to the second disconnector D2, the second disconnector D2 In solder joint be heated thawing, then disconnect the second protection circuit, thus play overload protection function；When When 3rd protection circuit has electric current to flow through, varistor RV1 generates heat, and its heat passes to first and takes off Solder joint in device D1, the first disconnector D1 is heated thawing, then disconnect the 3rd protection circuit, by This plays overload protection function.

In this embodiment, the rated temperature threshold value of the first disconnector D1 and the second disconnector D2 is 60 DEG C～500 DEG C.Preferably, the first disconnector D1 and the rated temperature threshold value of the second disconnector D2 It is 90 DEG C～200 DEG C.

Embodiment 8

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 9: include L (phase Line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2 and the 4th pressure Quick resistance RV4；

Specifically, first varistor RV1 the first end is connected with the first terminal, the first varistor First end of RV1 the second end and the first gas-discharge tube V1 connects, the first gas-discharge tube V1 The second end and the second terminal connect；

Specifically, second varistor RV2 the first end and the second terminal connect, the second varistor First end of the second end RV2 and the second gas-discharge tube V2 connects, the second gas-discharge tube V2 The second end and the 3rd terminal connect；

Further, the common port a of the first varistor RV1 and the first gas-discharge tube V1 with Connected by wire between the common port b of the second varistor RV2 and the second gas-discharge tube V2.

Further, at the first varistor RV1 and the common port c of L terminal and the second pressure-sensitive electricity It is connected by the 4th varistor RV4 between the common port d of resistance RV2 with N terminal.

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) composed in parallel by the 4th varistor RV4 and a series arm, (series arm By after the second varistor RV2 and the first gas-discharge tube V1 parallel connection again with the first varistor RV1 is composed in series)；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) it is made up of the second gas-discharge tube V2 and a parallel branch, (parallel branch is by the 4th Varistor RV4 and the first varistor RV1 is in parallel with the second varistor RV2 again after connecting Compose in parallel with the first gas-discharge tube V1 again)；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) be made up of a parallel branch second gas-discharge tube V2 that connects, wherein, parallel branch by 4th varistor RV4 and the second varistor RV2 series connection after again with the first varistor RV1 Compose in parallel；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection First varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2, After 4th varistor RV4 conducting becomes low-resistance, form three overvoltage leadage circuit (Article 1 Leadage circuit, Article 2 is formed along the first varistor RV1 and the first gas-discharge tube V1 direction Leadage circuit, Article 3 is formed along the first varistor RV1 and the second varistor RV2 direction Leadage circuit is formed along the 4th varistor RV4 direction), thus will scurry between circuit L-N Surge be limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line and N The protection of electronic equipment between line；When there is surge in circuit between N terminal and PE terminal, the First varistor RV1, the second varistor RV2, the first gas-discharge tube in two protection circuits After V1, the second gas-discharge tube V2, the 4th varistor RV4 conducting become low-resistance, form three (Article 1 is along the second varistor RV2 and the second gas-discharge tube V2 for bar overvoltage leadage circuit Direction forms leadage circuit, and Article 2 is along the first gas-discharge tube V1 and the second gas-discharge tube V2 Direction forms leadage circuit, Article 3 along the 4th varistor RV4, the first varistor RV1 and Second gas-discharge tube V2 direction forms leadage circuit), the electricity between L terminal and PE terminal When there is surge in road, the first varistor RV1 in the 3rd protection circuit, the second varistor RV2, After second gas-discharge tube V2, the 4th varistor RV4 conducting become low-resistance, form two mistakes (Article 1 is along the first varistor RV1 and the second gas-discharge tube V2 direction for voltage leadage circuit Forming leadage circuit, Article 2 is along the 4th varistor RV4, the second varistor RV2 and second Gas-discharge tube V2 direction forms leadage circuit), thus the electricity that will scurry between circuit L-PE Gush and be limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line and PE line Between the protection of electronic equipment.

In the present embodiment, on the basis of embodiment 1, add the 4th varistor RV4, then L-N protected mode the first protection circuit is with regard to many one article of roads of releasing along the 4th varistor RV4 Footpath, the surge being more beneficial for the first protection circuit is released；Then N-PE protected mode second protects electricity Road is with regard to many one article of roads of releasing connected along the 4th varistor RV4 and the first varistor RV1 Footpath, then the surge being more beneficial for the second protection circuit is released；L-PE protected mode the 3rd protection circuit Many one article is connected the releasing of direction along the 4th varistor RV4 and the second varistor RV2 Path, is more beneficial for the 3rd protection circuit surge and releases.

In this embodiment, the nominal varistor voltage scope of the 4th varistor RV4 is 18V～1800V.Preferably, the nominal varistor voltage value of the 4th varistor RV4 is 68V～150V.

Embodiment 9

In the present embodiment, bridge architecture surge protector circuit structure as shown in Figure 10: include L (phase line) terminal, N (neutral conductor) terminal and PE (ground wire) terminal, the first varistor RV1, First gas-discharge tube V1, the second varistor RV2, the second gas-discharge tube V2 and the 4th gas Body discharge tube V4；

Further, at the first gas-discharge tube V1 and the common port c of N terminal and the second gas It is connected by the 4th gas-discharge tube V4 between the common port d of discharge tube V2 and PE terminal.

Thus, and protection circuit between L terminal and N terminal (for ease of describing, referred to as first Protection circuit) it is made up of first one parallel branch of varistor RV1 series connection, parallel branch is by the After one gas-discharge tube V1 and the second varistor RV2 parallel connection again with a series arm joint group Become (series arm is composed in series by the second gas-discharge tube V2 and the 4th gas-discharge tube V4)；

(for ease of describing, referred to as second protects protection circuit between N terminal and PE terminal Circuit) composed in parallel by the 4th gas-discharge tube V4 and a series arm, wherein, series connection Route after the first gas-discharge tube V1 and the second varistor RV2 parallel connection again with the second gas discharge Pipe V2 is composed in series；

(for ease of describing, the referred to as the 3rd protection is electric for protection circuit between L terminal and PE terminal Road) it is made up of first one parallel branch of varistor RV1 series connection, wherein parallel branch is by first After gas-discharge tube V1 and the 4th gas-discharge tube V4 series connection again with the second gas-discharge tube V2 also Joint group becomes；

During circuit work: when surge occurs in the circuit between L terminal and N terminal, the first protection First varistor RV1 in circuit, the first gas-discharge tube V1, the second varistor RV2, After second gas-discharge tube V2, the 4th gas-discharge tube V4 conducting become low-resistance, form three mistakes (Article 1 is along the first varistor RV1 and the first gas-discharge tube V1 direction for voltage leadage circuit Forming leadage circuit, Article 2 is along the first varistor RV1 and the second varistor RV2 direction Forming leadage circuit, Article 3 is along the first varistor RV1, the second gas-discharge tube V2 and the Four gas-discharge tube V4 directions form leadage circuit), thus will scurry between circuit L-N Surge is limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line and N line Between the protection of electronic equipment；When there is surge in circuit between N terminal and PE terminal, second Second varistor RV2, the first gas-discharge tube V1, the second gas-discharge tube in protection circuit After V2, the 4th gas-discharge tube V4 conducting become low-resistance, form three articles of overvoltage leadage circuits (the Article one, form leadage circuit along the second varistor RV2 and the second gas-discharge tube V2 direction, the Article two, form leadage circuit along the first gas-discharge tube V1 and the second gas-discharge tube V2 direction, the Article three, form leadage circuit along the 4th gas-discharge tube V4 direction), when L terminal and PE terminal it Between circuit time surge occurs, first varistor RV1 the first gas discharge in the 3rd protection circuit After pipe V1, the second gas-discharge tube V2, the 4th gas-discharge tube V4 conducting become low-resistance, shape (Article 1 is along the first varistor RV1 and the second gas-discharge tube to become two overvoltage leadage circuits V2 direction forms leadage circuit, and Article 2 is along the first varistor RV1, the first gas-discharge tube V1 and the 4th gas-discharge tube V4 direction form leadage circuit), thus circuit L-PE will be scurried into Between surge be limited in the voltage range that electronic equipment can bear, it is achieved to being connected to L line And the protection of electronic equipment between PE line.

In the present embodiment, on the basis of embodiment 1, add the 4th gas-discharge tube V4, then L-N protected mode the first protection circuit with regard to many one article along the second gas-discharge tube V2 and the 4th The path in the direction of gas-discharge tube V4 series connection, the surge being more beneficial for the first protection circuit is released； Then N-PE protected mode the second protection circuit with regard to many one article along the 4th gas-discharge tube V4 direction Releasing path, the surge being more beneficial for the second protection circuit is released；L-PE protected mode the 3rd is protected Circuit is with regard to many one article of releasing along the first gas-discharge tube V1 and the 4th gas-discharge tube direction V4 Path, is more beneficial for the 3rd protection circuit surge and releases.

In this embodiment, the nominal spark discharge voltage scope of the 4th gas-discharge tube V4 70V～3500V.Preferably, the nominal spark discharge voltage scope of the 4th gas-discharge tube V4 90V～150V.

Embodiment 10

In the present embodiment, bridge architecture surge protector circuit structure as shown in figure 11: include DC+ (direct-flow positive pole line) terminal, DC-(direct current negative line) terminal and PE (ground wire) terminal, One varistor RV1, the second varistor RV2, the first gas-discharge tube V1, the second gas Discharge tube V2, the 5th gas-discharge tube V5, the 6th gas-discharge tube V6, the second capacitor C2, 3rd capacitor C3；

Specifically, first end of the first varistor RV1 is connected with DC+ terminal, the first pressure-sensitive electricity Second end of resistance RV1 and first end of the first gas-discharge tube V1 connect, the first gas-discharge tube Second end of V1 and first end of the 5th gas-discharge tube V5 connect, the 5th gas-discharge tube V5 The second end and first end of the 6th gas-discharge tube V6 connect, the of the 6th gas-discharge tube V6 Two ends are connected with DC-terminal；First end of the second capacitor C2 and the first gas-discharge tube V1 and The common port of the 5th gas-discharge tube V5 connects, first end of the 3rd capacitor C3 and the 5th gas The common port of discharge tube V5 and the 6th gas-discharge tube V6 connects, the second of the second capacitor C2 It is connected with DC-terminal after holding the second end with the 3rd capacitor C3 and tying；

Specifically, first end of the second varistor RV2 is connected with DC-terminal, the second pressure-sensitive electricity Second end of resistance RV2 and first end of the second gas-discharge tube V2 connect, the second gas-discharge tube Second end of V2 is connected with PE terminal；

Thus, the protection circuit between DC+ terminal and DC-terminal is (for ease of describing, referred to as First protection circuit) it is made up of first one parallel branch of varistor RV1 series connection.Wherein in parallel Prop up route discharge gap chain (for convenience of describing, referred to as G) and the second varistor RV2 joint group Becoming, wherein, electric discharge chain G is triggered circuit by 3 layers of discharge gap and 2 and forms, specifically, and 3 layers Discharge gap is by the first gas-discharge tube V1, the 5th gas-discharge tube V5, the 6th gas-discharge tube V6 Being composed in series, 2 articles are triggered circuit and are made up of the second capacitor C2 and the 3rd capacitor C3 respectively；

(for ease of describing, referred to as second protects protection circuit between DC-terminal and PE terminal Circuit) by a parallel branch, (parallel branch is by discharge gap chain G and the second varistor RV2 Compose in parallel) it is composed in series with the second gas-discharge tube V2, the protection between DC+ and PE terminal Circuit (for ease of describing, the referred to as the 3rd protection circuit) is by the first varistor RV1 series connection the Two gas-discharge tube V2 compositions；

During circuit work: when surge occurs in the circuit when between DC+ line and DC-line, surge voltage is same Time be applied to the first varistor RV1, the second varistor RV2 and discharge gap chain G two ends, Wherein the resistance value of the first varistor RV1 and the second varistor RV2 raises with voltage and subtracts Few, the low-resistance of the surge energy that the most all becomes releasing.And discharge gap chain G two ends transient voltage After reaching the startup threshold value of gas-discharge tube V1, trigger the second capacitor C2 auxiliary in circuit the One gas-discharge tube V1 igniting conducting, then the first gas-discharge tube V1 becomes low-resistance, and simultaneously the 5th The voltage at gas-discharge tube V5 two ends rises, and after it reaches to start its threshold value, triggers in circuit The 5th gas-discharge tube V5 conducting in 3rd capacitor C3 auxiliary discharge gap chain, the 5th gas is put Fulgurite V5 becomes low-resistance, and the voltage at the 6th gas-discharge tube V6 two ends rises, and reaches when it equally After starting its threshold value, the 6th gas-discharge tube V6 becomes low-resistance, and then whole first protection electricity All components and parts in road all become low-resistance；(Article 1 is along to form two articles of overvoltage leadage circuits One varistor RV1 forms leadage circuit with the direction of electric discharge chain G, and Article 2 is pressure-sensitive along first Resistance RV1 and the second varistor RV2 direction form leadage circuit), thus line will be scurried into Surge between the DC+-DC-of road is limited in the voltage range that electronic equipment can bear, it is achieved To being connected to the protection of electronic equipment between DC+ line and DC-line.

When surge occurs in circuit between DC-terminal and PE terminal, surge voltage applies simultaneously To the second varistor RV2, discharge gap chain G and the second gas-discharge tube V2 two ends, Qi Zhong The resistance value of two varistor RV2 raises with voltage and reduces, and the most all becomes surge of can releasing The low-resistance of energy, becomes low-resistance after the second gas-discharge tube V2 conducting.And discharge gap chain G two ends After transient voltage reaches the startup threshold value of gas-discharge tube V1, trigger the second capacitor in circuit C2 assists the first gas-discharge tube V1 igniting conducting, then the first gas-discharge tube V1 becomes low-resistance, The voltage at the 5th gas-discharge tube V5 two ends rises simultaneously, after it reaches to start its threshold value, triggers The 5th gas-discharge tube V5 conducting in the 3rd capacitor C3 auxiliary discharge gap chain in circuit, the Five gas-discharge tube V5 become low-resistance, and the voltage at the 6th gas-discharge tube V6 two ends rises, with Sample is after it reaches to start its threshold value, and the 6th gas-discharge tube V6 becomes low-resistance, and then whole All components and parts in two protection circuits all become low-resistance；Form two articles of overvoltage leadage circuits ( Article one, the direction along the second varistor RV2 with electric discharge chain G forms leadage circuit, and Article 2 is edge Second varistor RV2 forms leadage circuit with electric discharge chain G direction), thus circuit will be scurried into Surge between DC--PE terminal is limited in the voltage range that electronic equipment can bear, it is achieved right It is connected to the protection of electronic equipment between DC-line and PE line.

When surge occurs in circuit between DC+ terminal and PE terminal, surge voltage applies simultaneously To the first varistor RV1 and the second gas-discharge tube V2 two ends, wherein the first varistor RV1 Resistance value raise with voltage and reduce, the low-resistance of the surge energy that the most all becomes releasing, the Two gas-discharge tube V2 both end voltage become low-resistance after exceeding the conducting of its dielectric strength.And then it is whole All components and parts in 3rd protection circuit all become low-resistance；Formed along the first varistor RV1 with The leadage circuit in the direction of the second gas-discharge tube V2, thus will scurry into circuit DC+-PE it Between surge be limited in the voltage range that electronic equipment can bear, it is achieved to being connected to DC+ The protection of electronic equipment between line and PE line.

In this embodiment, the 5th gas-discharge tube V5 and the nominal spark of the 6th gas-discharge tube V6 Discharge voltage range 70V～3500V.Preferably, the first gas-discharge tube V1, the 5th gas are put Fulgurite V5, the 6th gas-discharge tube V6 value are identical, nominal spark discharge voltage scope 90V～230V.Preferably, the first gas-discharge tube V1, the 5th gas-discharge tube V5, the 6th gas Body discharge tube V6 is integrated element, for example, lamination gas-discharge tube.Second capacitor C2 It is 10PF～100nF with the capacitance of the 3rd capacitor C3, preferably 50PF～3nF, withstanding voltage For 100V～10kV.

It should be understood that in above-mentioned all embodiments, varistor and gas-discharge tube are all electricity Pressure-sensitive perceptual device, i.e. under different voltages, its bulk properties can change.Specifically, pressure The resistance of quick resistance can reduce along with the rising of voltage, and gas-discharge tube exceedes it when applied voltage During dielectric strength, the gap of two interpolars, by discharge breakdown, is converted into conducting by original off-state State.Such as when surge occurs in the circuit between L terminal and N terminal, surge voltage is executed simultaneously It is added in the first varistor RV1, the first gas-discharge tube V1, the second varistor RV2 two ends. Under the effect of surge voltage, the first varistor RV1 and the second varistor RV2 becomes low Resistance, in turn limit the amplitude of surge voltage.Meanwhile, if the first gas-discharge tube V1 The surge voltage at two ends exceedes its dielectric strength, and the first gas-discharge tube V1 becomes conducting state, Also limit the amplitude of surge voltage.Due to the second varistor RV2 and the first gas-discharge tube V1 is in parallel, in addition to shunting, and the spike brought when also reducing the first gas-discharge tube response, Further increasing the response speed to surge, for this parameter is released in surge, effect is more Excellent.

It is above a kind of bridge architecture surge protector provided by the present invention has been carried out detailed Jie Continue.Principle and the embodiment of the present invention are set forth by specific case used herein, with The explanation of upper embodiment is only intended to help to understand method and the core concept thereof of the present invention.Should refer to Go out, for those skilled in the art, in the premise without departing from the principle of the invention Under, it is also possible to the present invention is carried out some improvement and modification, and these improve and modification also falls into this In bright scope of the claims.

Claims

1. a bridge architecture surge protector, it is characterised in that including:

The first terminal, the second terminal, the 3rd terminal, the first varistor, the first gas discharge Pipe, the second varistor and the second gas-discharge tube；

First end of described first varistor is connected with the first terminal, described first varistor The second end be connected with the first end of described first gas-discharge tube, described first gas-discharge tube The second end be connected with described second terminal；

First end of described second varistor and the second terminal connect, described second varistor The second end be connected with the first end of described second gas-discharge tube, described second gas-discharge tube The second end be connected with described 3rd terminal；

The common port of described first varistor and described first gas-discharge tube and described second pressure The common port of quick resistance and described second gas-discharge tube connects.

Bridge architecture surge protector the most according to claim 1, it is characterised in that institute State the common port of the first varistor and described first gas-discharge tube and described second varistor Connected by wire with the common port of described second gas-discharge tube；

Or described first varistor and the common port and described second of described first gas-discharge tube The common port of varistor and described second gas-discharge tube is connected by the 3rd varistor；

Or described first varistor and the common port and described second of described first gas-discharge tube The common port of varistor and described second gas-discharge tube is connected by the first fuse；

Or described first varistor and the common port and described second of described first gas-discharge tube The common port of varistor and described second gas-discharge tube is connected by the 3rd gas-discharge tube.

Bridge architecture surge protector the most according to claim 1, it is characterised in that also Including indicating circuit, the first end of described indicating circuit is connected with the first terminal, described instruction electricity Second end on road and the second terminal connect.

Bridge architecture surge protector the most according to claim 1, it is characterised in that also Including the second fuse and the 3rd fuse；

Described second fuse is serially connected between described the first terminal and described first varistor；

Described 3rd fuse is serially connected between described second terminal and described second varistor.

Bridge architecture surge protector the most according to claim 1, it is characterised in that also Including the first disconnector and the second disconnector；

Bridge architecture surge protector the most according to claim 1, it is characterised in that also Including the 4th varistor；

Described 4th varistor the first end and described the first terminal and the first varistor public End connection, described 4th varistor the second end and described second terminal and the second varistor Common port connects.

Bridge architecture surge protector the most according to claim 1, it is characterised in that also Including the 4th gas-discharge tube；

Described 4th gas-discharge tube the first end and described second terminal and the first gas-discharge tube Common port connects, described 4th gas-discharge tube the second end and described 3rd terminal and the second gas Discharge tube common port connects.

Bridge architecture surge protector the most according to claim 1, it is characterised in that also Including the 5th gas-discharge tube, the 6th gas-discharge tube, the second capacitor and the 3rd capacitor；

First end of described 5th gas-discharge tube connects with the second end of described first gas-discharge tube Connecing, the second end of described 5th gas-discharge tube connects with the first end of described 6th gas-discharge tube Connecing, the second end of described 6th gas-discharge tube is connected with described second terminal；

First end of described second capacitor and described first gas-discharge tube and described 5th gas The common port of discharge tube connects, the second end of described 3rd capacitor and described 5th gas discharge Pipe and described 6th gas-discharge tube common port connect, the second end of described second capacitor with It is connected with described second terminal after second end of described 3rd capacitor knot.

Bridge architecture surge protector the most according to claim 1, it is characterised in that institute The nominal spark discharge voltage difference stating the first gas-discharge tube and described second gas-discharge tube is little In 200V, described first varistor and the nominal varistor voltage difference of described second varistor Less than 200V.

Bridge architecture surge protector the most according to claim 9, it is characterised in that Described nominal spark discharge voltage is more than described nominal varistor voltage, and described nominal spark discharge Voltage is less than 200V with the difference of described nominal varistor voltage.