CN203504172U - Lightning protection circuit module - Google Patents
Lightning protection circuit module Download PDFInfo
- Publication number
- CN203504172U CN203504172U CN201320673702.7U CN201320673702U CN203504172U CN 203504172 U CN203504172 U CN 203504172U CN 201320673702 U CN201320673702 U CN 201320673702U CN 203504172 U CN203504172 U CN 203504172U
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- China
- Prior art keywords
- protection circuit
- circuit module
- gas discharge
- lightning protection
- network transformer
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000011787 zinc oxide Substances 0.000 claims abstract description 24
- 230000001052 transient effect Effects 0.000 claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 229960001296 zinc oxide Drugs 0.000 claims description 22
- 230000001681 protective effect Effects 0.000 claims description 16
- 238000005538 encapsulation Methods 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001629 suppression Effects 0.000 abstract 2
- 238000001914 filtration Methods 0.000 abstract 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 9
- 238000004891 communication Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000006173 Good's buffer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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Abstract
The utility model discloses a lightning protection circuit module. The lightning protection circuit module includes gas discharge tubes, a zinc oxide varistor, decoupling resistors, transient voltage suppression diodes, a network transformer and filtering capacitors which are integrated in a protection circuit module. The primary side of the network transformer is divided into four groups; two ends of a primary coil in each group are connected with input differential data lines; and two ends of a secondary coil in each group are connected with output differential data lines. According to the lightning protection circuit module of the utility model, the decoupling resistors are connected in series with the differential data lines at the secondary side of the network transformer, such that a first-stage protection circuit can act at first; an internet port transformer primary tap is grounded through the zinc oxide varistor; the differential data lines connected with the primary side of the network transformer are connected with in parallel with the three-terminal gas discharge tubes, such that a shunting effect can be realized, and the gas discharge tubes will not bear high current alone, and therefore, the aging and failure of the discharge tubes can be delayed; and the transient voltage suppression diodes at the secondary side of the transformer can suppress differential-mode voltage converted from primary protection circuit common-mode voltage. The lightning protection circuit module has a double-protection function, namely has a common-mode voltage protection ability and a differential-mode voltage protection ability, and therefore, the safety and reliability of equipment Ethernet ports can be greatly enhanced.
Description
Technical field
The utility model relates to a kind of lightning protection circuit module, is especially a kind ofly applied to disconnectable lightning protection circuit module on outdoor single network interface class communication equipment.
Background technology
At thunderstorm season, thunder and lightning is very normal phenomenon, but serious thunder and lightning weather tends to outdoor communication equipment to bring very serious destruction, and when even dangerous, entail dangers to is to people's life security.In order to prevent the generation of this class situation, the Ministry of Information Industry, to having increased the classification standard of lightning Protection in the national standard of this kind equipment, has also gone out a set of lightning Protection standard of oneself between follow-up each communication common carrier.
General network interface thunderbolt design is all integrated on mainboard; by gas discharge tube; the protection devices such as TVS pipe (transient voltage twin zener dioder) form; such design is no doubt convenient; but this equipment is applied in the more serious region of thunderbolt; large-area equipment suffers that thunderbolt will produce the problem of the maintenance of doing over again while destroying; most plank all can not keep in repair and can only scrap because thunderbolt is corrupted to mainboard; more renew finally can only to client, this increases greatly for the follow-up maintenance cost of manufacturer.The protection of traditional network interface is general only adds gas discharge tube on data difference separated time, but because gas discharge tube reaction is slow operate time, and long-term action can make component failure very fast, loses protective action.
Utility model content
The utility model technical issues that need to address are to provide a kind of outdoor single network interface class communication equipment that is applied to, conveniently replaced, have duplicate protection ability, do not damage the lightning protection circuit module of mainboard.
For addressing the above problem, technical solution adopted in the utility model is: a kind of lightning protection circuit module, comprise and be integrated in a gas discharge tube RV1～RV4 in protective circuit module, Zinc-oxide piezoresistor VDR, move back even resistance R 435～R439, R442～R444, transient voltage twin zener dioder TVS5～TVS8, network transformer T1 and filter capacitor C185, C186, it is characterized in that: network transformer T1 is elementary is divided into four groups, the primary coil two ends of every group connect input difference data wire, secondary coil two ends connect output differential data line, in the differential data line of the elementary connection of network transformer and connect gas discharge tube, gas discharge tube other end ground connection, the elementary tap of network transformer T1 is by Zinc-oxide piezoresistor VDR ground connection, in the differential data line that network transformer T1 time level connects, transient voltage twin zener dioder in parallel is again moved back after even resistance in series connection.
Described gas discharge tube adopts three terminal gas discharge tubes of 3RM230L-8 type.
Described transient voltage twin zener dioder adopts the transient voltage twin zener dioder of BV03CW type.
Described Zinc-oxide piezoresistor adopts the plug-in unit Zinc-oxide piezoresistor of TVR10101KOC3AI3Y type.
Describedly move back the Chip-R that even resistance is 0402 encapsulation, its resistance is 5.1 ohm.
The beneficial effect that adopts technique scheme to produce is: the utility model is gone here and there and moved back even resistance in the secondary differential data line of network transformer; make first order protective circuit first produce action; the elementary tap of net mouth transformer adds Zinc-oxide piezoresistor over the ground; play the effect of shunting with three terminal gas discharge tube parallel connections; be unlikely to allow alone gas discharge tube bear large electric current, delayed the ageing failure of discharge tube.The transient voltage twin zener dioder of transformer secondary output has suppressed the differential mode voltage being changed by elementary protective circuit common-mode voltage, this design tool duplicate protection, existing protection common-mode voltage ability has again the ability of protection differential mode voltage, greatly strengthened the security reliability to equipment Ethernet interface, can meet the lightning Protection requirement of this product in various International Certifications, the most important thing is that this circuit is integrated in a protection module, and connect separately the earth, there is good buffer action with mainboard, protection module can be freely changed in thunderbolt protective circuit damage later, made up situation about cannot repair after protecting circuit designed is destroyed on mainboard.
Accompanying drawing explanation
Fig. 1 is the utility model circuit theory diagrams;
Embodiment
Below in conjunction with accompanying drawing, utility model is described in further detail: as shown in Figure 1, be integrated in a gas discharge tube RV1～RV4 in protective circuit module this novel comprising, Zinc-oxide piezoresistor VDR, move back even resistance R 435～R439, R442～R444, transient voltage twin zener dioder TVS5～TVS8, network transformer T1 and filter capacitor C185, C186, network transformer is elementary is divided into four groups, the primary coil two ends of every group connect input difference data wire, secondary coil two ends connect output differential data line, in the differential data line of the elementary connection of network transformer and connect gas discharge tube, gas discharge tube other end ground connection, between data difference separated time, with the gas discharge tube of three terminal ground connection, save arrangement space, the elementary tap of network transformer is by Zinc-oxide piezoresistor ground connection, play the effect of shunting with three terminal gas discharge tube parallel connections, be unlikely to allow alone gas discharge tube bear large electric current, delayed the ageing failure of discharge tube.In the differential data line of the secondary connection of network transformer, transient voltage twin zener dioder in parallel is again moved back after even resistance in series connection.In transformer secondary output differential data line, connecting and moving back even resistance is in order to allow first order protective circuit can first produce action; The transient voltage twin zener dioder of transformer secondary output has suppressed the differential mode voltage being changed by elementary protective circuit common-mode voltage, and this circuit is made an independent lightning strike protection module and connect separately the earth, and mainboard has good buffer action.
Gas discharge tube: when applied voltage increases to the dielectric strength over gas, the gap of two interpolars is by discharge breakdown, by original state of insulation, be converted into conduction state, the voltage after conducting between discharge tube the two poles of the earth maintains the residual voltage level that electric arc channel determines of putting.
Zinc-oxide piezoresistor: when overvoltage appears at two interpolar of Zinc-oxide piezoresistor, Zinc-oxide piezoresistor can be by voltage clamping to relatively-stationary magnitude of voltage, thus realize the protection to late-class circuit.The response time of Zinc-oxide piezoresistor is ns level, faster than gas discharge tube, and slightly slower than TVS pipe, the discharge capacity of Zinc-oxide piezoresistor is larger, but less than gas discharge tube.Its response speed of overvoltage protection for electronic circuit can meet the demands.The junction capacitance of Zinc-oxide piezoresistor is the order of magnitude scope to several thousand Pf at hundreds of generally; in a lot of situations, should not directly be applied in the protection of high-frequency signal circuit; while being applied in the protection of alternating current circuit; because its junction capacitance increases leakage current compared with conference; when design protection circuit, need to take into full account; the discharge capacity of Zinc-oxide piezoresistor is larger; but less than gas discharge tube; in the utility model design, used Zinc-oxide piezoresistor to connect the earth on transformer tapping, such design can not cause because of the problem of junction capacitance data-signal variation.
Transient voltage twin zener dioder (TVS pipe): when the high energy impact events of moment is stood at TVS pipe two ends, reach its voltage of starting, it can make with high speed its impedance suddenly reduce, absorb a large electric current simultaneously, by the voltage clamp between its two ends on a predetermined numerical value, thereby guarantee that circuit element below avoids the high-octane impact of transient state and damage.
Move back even resistance: be placed between first order protective circuit and second level protective circuit; prevent that first order protective circuit is also not activated second level protective circuit and has just started; if starting, second level protective circuit comparatively fast can cause first order circuit just not started; rear class protective circuit has been born all thunderbolt energy like this, does not reach the object that protective circuit designed originally.
As this novel embodiment, above-mentioned gas discharge tube adopts three terminal gas discharge tubes of 3RM230L-8 type.Transient voltage twin zener dioder adopts the transient voltage twin zener dioder of BV03CW type.Zinc-oxide piezoresistor adopts the plug-in unit Zinc-oxide piezoresistor of TVR10101KOC3AI3Y type.Move back the Chip-R that even resistance is 0402 encapsulation, its resistance is 5.1 ohm.
The equipment network interface lightning resistance energy parameter of this design is as follows:
1 lightning waveform (10/700us), built-in 40 Ohmic resistances, holding wire over the ground, can bear 6000V, and wire size line, to holding wire, can bear at least 4KV.
2 composite waves (1.2/50us, 8/20us), built-in 42 Ohmic resistances, holding wire over the ground, can bear 6000V, and wire size line, to holding wire, can bear at least 4KV.
This novel greatly reducing because thunderbolt destroys the maintenance cost of doing over again causing; it is higher that the design of lightning-protection module makes that lightning protection grade can do; make mainboard safer in thunderbolt with the isolation design of mainboard, can facilitate the design of changing lightning protection module on mainboard freely to make to have reached optimum on the upper and rework cost of maintenance.
This overvoltage type protection philosophy: when very large voltage that thunderbolt causes; at this time Zinc-oxide piezoresistor starts; gas discharge tube starts; in a short period of time by large voltage clamping to very low residual voltage; residual voltage to only having several volts, is not damaged chip through TVS pipe (transient voltage twin zener dioder) clamper at transformer secondary output.
Claims (5)
1. a lightning protection circuit module, comprise and be integrated in a gas discharge tube RV1～RV4 in protective circuit module, Zinc-oxide piezoresistor VDR, move back even resistance R 435～R439, R442～R444, transient voltage twin zener dioder TVS5～TVS8, network transformer T1 and filter capacitor C185, C186, it is characterized in that: network transformer T1 is elementary is divided into four groups, the primary coil two ends of every group connect input difference data wire, secondary coil two ends connect output differential data line, in the differential data line of the elementary connection of network transformer and connect gas discharge tube, gas discharge tube other end ground connection, the elementary tap of network transformer T1 is by Zinc-oxide piezoresistor VDR ground connection, in the differential data line that network transformer T1 time level connects, transient voltage twin zener dioder in parallel is again moved back after even resistance in series connection.
2. lightning protection circuit module according to claim 1, is characterized in that described gas discharge tube adopts three terminal gas discharge tubes of 3RM230L-8 type.
3. lightning protection circuit module according to claim 1, is characterized in that described transient voltage twin zener dioder adopts the transient voltage twin zener dioder of BV03CW type.
4. lightning protection circuit module according to claim 1, is characterized in that described Zinc-oxide piezoresistor adopts the plug-in unit Zinc-oxide piezoresistor of TVR10101KOC3AI3Y type.
5. lightning protection circuit module according to claim 1, moves back the Chip-R that even resistance is 0402 encapsulation described in it is characterized in that, its resistance is 5.1 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320673702.7U CN203504172U (en) | 2013-10-29 | 2013-10-29 | Lightning protection circuit module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320673702.7U CN203504172U (en) | 2013-10-29 | 2013-10-29 | Lightning protection circuit module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504172U true CN203504172U (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320673702.7U Expired - Fee Related CN203504172U (en) | 2013-10-29 | 2013-10-29 | Lightning protection circuit module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532545A (en) * | 2019-01-08 | 2019-03-29 | 唐山智通仪表技术有限公司 | A kind of electric motor intelligent charging pile |
-
2013
- 2013-10-29 CN CN201320673702.7U patent/CN203504172U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532545A (en) * | 2019-01-08 | 2019-03-29 | 唐山智通仪表技术有限公司 | A kind of electric motor intelligent charging pile |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 |
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| CF01 | Termination of patent right due to non-payment of annual fee |