CN203326590U - Signal circuit lightning protection device - Google Patents
Signal circuit lightning protection device Download PDFInfo
- Publication number
- CN203326590U CN203326590U CN2012206124127U CN201220612412U CN203326590U CN 203326590 U CN203326590 U CN 203326590U CN 2012206124127 U CN2012206124127 U CN 2012206124127U CN 201220612412 U CN201220612412 U CN 201220612412U CN 203326590 U CN203326590 U CN 203326590U
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- lightning protection
- voltage stabilizing
- circuit
- protection device
- signal
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Abstract
The utility model provides a signal circuit lightning protection device for a telephone program control switch. The signal circuit lightning protection device comprises a gas discharge tube DZ and thermistors PTC1 and PTC2, wherein two ends of an input signal are respectively connected with two base pins of the gas discharge tube DZ and one end of the thermistors PTC1 and PTC2, the other end of the thermistors PTC1 and PTC2 are two ends of an output signal respectively, a third base pin of the gas discharge tube DZ is connected with a lightning protection ground wire. The signal circuit lightning protection device is characterized by further comprising a voltage stabilizing circuit, two ends of the voltage stabilizing circuit are respectively connected with the two ends of the output signal, the voltage stabilizing circuit comprises voltage stabilization inhibition diodes D1, D2 and D3, the diode D1 and the diode D2 are connected in series and then are connected in parallel with the diode D3, and the lightning protection ground wire is connected between the diode D1 and the diode D2 through leads. The signal circuit lightning protection device can guarantee no influence on work under a thunder and lightning condition, maintains a circuit work voltage, excellently protects equipment and has excellent work performance.
Description
Technical field
The utility model provides a kind of programme-controlled lightning-protection module of phone that belongs to, and belongs to the Lightning Prevention Technique field
Background technology
Thermal effect, blast effect, dynamo-electric effect, static and electromagnetic induction etc. that the destruction main manifestations of thunder and lightning is lightning current, the main path Shi“ road of lightning ingress " and " field ", lightning protection measures is corresponding " opening circuit " and " closing " namely." closing " is mainly that shielding is that the equipment will needed protection is placed in shield by shielding and insulation, and the energy that makes thunder and lightning not invade or to invade is little of being not enough to damage equipment.Insulation is on the one hand to make the equipment that will the protect passage away from lightning ingress, is to adopt the not optical cable of induction lightening to carry out the signal transmission on the other hand.The main method " opened circuit " is the SPD surge protector to be installed with equipotential, is connected, and it is to make between equipment or device, in the equipotential state, not have potential difference just can not be electrically shocked and wear damage that equipotential connects.The SPD surge protector is installed is the thunder and lightning of being invaded by cable line was released into ground by SPD moment, the potential difference that protected equipment is born is acceptable.
The current lightning protection programme-controlled to phone generally adopts and assign gas discharge tube on distributing frame; can reach the most of thunder energy of bleed off, play the effect of lightning protection, but exoelectrical reaction speed be slow; lightning current likely first is applied on the electronic device of programme-controlled inside, thus damage equipment.The utility model that the patent No. is ZL200720024910.9 provides a kind of novel lightning protection module for network, adopt 4 TVS to manage integrated TVS chip, overcome the slow-footed defect of exoelectrical reaction, embodied the advantage that clamp voltage is low, transmission rate is high, but the lightning current energy that can bear due to the TVS chip is low, operating voltage is low, be not suitable for Uc high, require to bear the signal circuit that the lightning current energy is large.
The utility model content
The purpose of this utility model is to provide that a kind of exoelectrical reaction speed is fast, Uc is high, bear the signal circuit lightning protection device that the lightning current energy is large.Its technical scheme is:
A kind of signal circuit lightning protection device, comprise gas discharge tube 1, with thermistor 2, thermistor 3, the input signal two ends connect respectively two pins of gas discharge tube and an end of thermistor 2 and thermistor 3, described thermistor 2 and 3 other ends are respectively the two ends of output signal, the three-prong of gas discharge tube 1 is connected with lightning protection ground wire, it is characterized in that described signal circuit lightning protection device also comprises a voltage stabilizing circuit, the two ends of described voltage stabilizing circuit connect respectively the two ends of output signal, this voltage stabilizing circuit is by voltage stabilizing twin zener dioder 4, 5, 6 form, voltage stabilizing twin zener dioder 4, in parallel with voltage stabilizing twin zener dioder 6 after 5 series connection of voltage stabilizing twin zener dioder, voltage stabilizing twin zener dioder 4, between voltage stabilizing twin zener dioder 5, with wire, with lightning protection ground wire, be connected.
Better for the lightning protection effect that makes this device, should make the connecting line between voltage stabilizing circuit and lightning protection ground wire as far as possible short, thick, straight.
Its operation principle is that " under normal circumstances, the resistance of thermistor is very little, is equivalent to short circuit, and signal circuit is passed and can't afford any impact.When electric wave is come, voltage stabilizing twin zener dioder D1, D2, D3 move very fast, so it is conducting at first, lightning voltage is clamped down in very low level, along with lightning wave passes through thermistor, make the resistance of thermistor sharply increase, the thermistor front end be high-quality gas discharge tube DZ voltage also and then sharply become large, allow the conducting of high-quality gas discharge tube discharge, bleed off falls a large amount of thunder energies, meanwhile, voltage stabilizing circuit is strictly controlled the voltage of output signal end in whole process on the level of equipment normal operation, thereby guarantees device security work.
Compared with prior art, have following advantage: 1, reaction speed is fast for the utility model, and discharge capability is strong; 2, voltage regulation performance is good, the lightning wave of foot after guaranteeing to be clamped down on by it is on the level of equipment permission work, and the connection between input and output adopted thermistor, and he can carry out time delay and transfer overvoltage, well protect the equipment such as telephone exchanger, excellent working performance; 3, can to 32 road signals, be protected simultaneously.
The accompanying drawing explanation
Fig. 1 is the circuit diagram of the utility model embodiment.
Embodiment
In the embodiment shown in fig. 1: the input signal two ends connect respectively two pins of gas discharge tube DZ and the end of thermistor PTC1 and PTC2, described thermistor PTC1 and the PTC2 other end are respectively the two ends of output signal, the three-prong of gas discharge tube DZ is connected with lightning protection ground wire, it is characterized in that described signal circuit lightning protection device also comprises a voltage stabilizing circuit, the two ends of described voltage stabilizing circuit connect respectively the two ends of output signal, this voltage stabilizing circuit is by voltage stabilizing twin zener dioder D1, D2, D3 forms, D1, in parallel with D3 after the D2 series connection, D1, between D2, with wire, with lightning protection ground wire, be connected.
Claims (1)
1. a signal circuit lightning protection device, comprise gas discharge tube (1), with the first thermistor (2), the second thermistor (3), the input signal two ends connect respectively two pins of gas discharge tube DZ and an end of the first thermistor (2) and the second thermistor (3), described the first thermistor (2) and the second thermistor (3) other end are respectively the two ends of output signal, the three-prong of gas discharge tube (1) is connected with lightning protection ground wire, it is characterized in that described signal circuit lightning protection device also comprises a voltage stabilizing circuit, the two ends of described voltage stabilizing circuit connect respectively the two ends of output signal, this voltage stabilizing circuit is by voltage stabilizing twin zener dioder (4, 5, 6) form, the first voltage stabilizing twin zener dioder (4), in parallel with the 3rd voltage stabilizing twin zener dioder (6) after the second voltage stabilizing twin zener dioder (5) series connection, the first voltage stabilizing twin zener dioder (4), between the second voltage stabilizing twin zener dioder (5), with wire, with lightning protection ground wire, be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206124127U CN203326590U (en) | 2012-11-20 | 2012-11-20 | Signal circuit lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206124127U CN203326590U (en) | 2012-11-20 | 2012-11-20 | Signal circuit lightning protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326590U true CN203326590U (en) | 2013-12-04 |
Family
ID=49665885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012206124127U Expired - Fee Related CN203326590U (en) | 2012-11-20 | 2012-11-20 | Signal circuit lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203326590U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105431025A (en) * | 2015-12-03 | 2016-03-23 | 浪潮电子信息产业股份有限公司 | Method for improving ESD protection effect of VGA and saving space of PCB |
-
2012
- 2012-11-20 CN CN2012206124127U patent/CN203326590U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105431025A (en) * | 2015-12-03 | 2016-03-23 | 浪潮电子信息产业股份有限公司 | Method for improving ESD protection effect of VGA and saving space of PCB |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20141120 |
|
| EXPY | Termination of patent right or utility model |