CN218850406U

CN218850406U - Lightning protection module capable of monitoring abnormal high-voltage signals

Info

Publication number: CN218850406U
Application number: CN202223326049.5U
Authority: CN
Inventors: 黄章庆; 黄湘柏; 何鹉
Original assignee: Huage Electronics Kunshan Co ltd
Current assignee: Huage Electronics Kunshan Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-04-11
Anticipated expiration: 2032-12-09

Abstract

The utility model provides a lightning protection module capable of monitoring abnormal high-voltage signals, which is applied to the technical field of lightning protection circuits and comprises a shell, wherein a trigger unit and a three-level discharge tube GDT2 are arranged in the shell, and a protection unit for protecting the lightning protection module and a remote sensing unit for detecting trigger current in the trigger unit are also arranged in the shell; the trigger unit comprises a secondary discharge tube GDT1, one end of the secondary discharge tube GDT1 is electrically connected with a piezoresistor ZR and a capacitor C respectively, the other end of the piezoresistor ZR is connected with an input winding L1 of an isolation transformer, the other end of the piezoresistor ZR is electrically connected with a pin of a tertiary discharge tube GDT2, the other end of the capacitor C is electrically connected with the input winding L1 of the isolation transformer and the pin of the tertiary discharge tube GDT2, and the pin II and the pin III of the tertiary discharge tube GDT2 are connected with an output winding L2 of the isolation transformer. The leakage current can be reduced, the power consumption can be reduced, and the safety can be improved.

Description

Lightning protection module capable of monitoring abnormal high-voltage signals

Technical Field

The utility model belongs to the technical field of the lightning protection circuit, concretely relates to lightning protection module that can monitor unusual high-voltage signal.

Background

In the information era, computer networks and communication equipment are more and more precise, the requirements of working environments of the computer networks and the communication equipment are higher and higher, and thunder and lightning and transient overvoltage of large-scale electrical equipment frequently invade indoor electrical equipment and network equipment through circuits such as a power supply, an antenna, radio signal transceiving equipment and the like, so that equipment or components are damaged, casualties and transmission or storage data are interfered or lost, even the electronic equipment is subjected to misoperation or temporary paralysis, system pause and data transmission interruption, and a local area network or even a wide area network is damaged. It is harmful to eyes and heart, and the indirect loss is generally far greater than the direct economic loss.

The gas discharge tube is used as a lightning protection tube or an antenna switch tube for overvoltage protection, and two or more electrodes filled with a certain amount of inert gas are arranged in the tube. The gas discharge tube is a gap type lightning protection element, and is used for lightning protection of a communication system.

The prior lightning protection module mostly uses a piezoresistor as a protection element, belongs to a strangulation type protection module, and is still in a high-voltage state during overvoltage, so that the safety is not high, the leakage current is large, the aging is easy, and the service life is short.

Therefore, a lightning protection module with high safety, low leakage current and long service life is needed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problem in the prior art, the utility model aims at providing a lightning protection module that can monitor unusual high-voltage signal carries out the partial pressure through the combination of different circuit component, can reduce the leakage current, reduces power consumption, improves the security.

A lightning protection module capable of monitoring abnormal high-voltage signals comprises a shell, wherein a trigger unit and a three-level discharge tube GDT2 which are connected with each other are arranged in the shell, a protection unit for protecting the lightning protection module and a remote sensing unit for detecting trigger current in the trigger unit are further arranged in the shell;

the trigger unit comprises a secondary discharge tube GDT1, one end of the secondary discharge tube GDT1 is respectively and electrically connected with a piezoresistor ZR and a capacitor C, the other end of the piezoresistor ZR is connected with an input winding L1 of an isolation transformer, the other end of the piezoresistor ZR is electrically connected with a pin of a tertiary discharge tube GDT2, the other end of the capacitor C is electrically connected with the input winding L1 of the isolation transformer and the pin of the tertiary discharge tube GDT2, and the pin II and the pin III of the tertiary discharge tube GDT2 are connected with an output winding L2 of the isolation transformer.

To avoid spontaneous ignition of the lightning protection module, the internal gap of the housing is filled with a flame retardant filler.

In order to facilitate the connection of the lightning protection module and external equipment, the first pin of the third-level discharge tube GDT2 extends out of the shell to serve as a live wire terminal L, the third pin of the third-level discharge tube GDT2 extends out of the shell to serve as a zero wire terminal N, and the shell is further provided with a grounding end E.

In order to realize remote monitoring and control, the inside of the remote sensing unit is provided with an inductive switch K for monitoring the current of the secondary discharge tube GDT1, two ends of the inductive switch K are respectively connected with a first wiring terminal S1 and a second wiring terminal S2 through wires, and the first wiring terminal S1 and the second wiring terminal S2 extend out of the shell 1 and an external control circuit electric connection.

The trigger unit comprises a secondary discharge tube GDT1, one end of the secondary discharge tube GDT1 is electrically connected with a resistor R1 and a parameter resistor R respectively, the other end of the secondary discharge tube GDT1 is connected with an input winding L1 of an isolation transformer, the other end of the resistor R1 is electrically connected with a pin of a tertiary discharge tube GDT2, the other end of the parameter resistor R is electrically connected with the input winding L1 of the isolation transformer and the pin of the tertiary discharge tube GDT2, and the pin II and the pin III of the tertiary discharge tube GDT2 are connected with an output winding L2 of the isolation transformer.

The trigger unit comprises a secondary discharge tube GDT1, two ends of the secondary discharge tube GDT1 are connected with a piezoresistor ZR and one end of an input winding L1 of an isolation transformer, the other end of the input winding L1 of the isolation transformer is connected with a pin III of a tertiary discharge tube GDT2, the other end of the piezoresistor ZR is electrically connected with the pin III of the tertiary discharge tube GDT2, and an output winding L2 of the isolation transformer is connected with the pin III and the pin II of the tertiary discharge tube GDT 2.

The utility model has the advantages that: according to the lightning protection module capable of monitoring the abnormal high-voltage signal, the leakage current of the lightning protection module is small through the voltage division between the piezoresistor ZR and the capacitor C, and the application range of the safety standard is wide; meanwhile, the trigger signal of the lightning protection module is increased by partial pressure, so that the false triggering of small signals can be effectively avoided, and the normal use of protected devices is guaranteed.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a first circuit diagram of the trigger unit of the present invention;

fig. 3 is a second circuit diagram of the trigger unit of the present invention;

fig. 4 is a third circuit diagram of the trigger unit of the present invention.

Labeled as: 1. a housing; 2. a flame retardant filler.

Detailed Description

Example one

As shown in fig. 1, a lightning protection module capable of monitoring an abnormal high voltage signal includes a housing 1, and a trigger unit, a three-level discharge tube GDT2, a protection unit and a remote sensing unit are disposed inside the housing 1. The flame-retardant filler 2 is filled in the gap inside the shell 1, and the flame-retardant filler 2 can be quartz powder or flame-retardant glue and is used for avoiding spontaneous combustion of the lightning protection module.

The protection unit is used for protecting the lightning protection module, and can detect the current and the temperature, and the protection unit can be any circuit with a protection function, and the specific circuit structure is not described herein.

The inside of remote sensing unit is provided with and is used for monitoring secondary discharge tube GDT1 electric current 'S inductive switch K, inductive switch K' S both ends are connected with first terminal S1, second terminal S2 through the wire respectively, first terminal S1, second terminal S2 stretch out casing 1 and external control circuit electric connection are favorable to realizing remote monitoring.

As shown in fig. 2, the trigger unit includes a second-level discharge tube GDT1, one end of the second-level discharge tube GDT1 is electrically connected with a piezoresistor ZR, a capacitor C, the other end is connected with an input winding L1 of an isolation transformer, the other end of the piezoresistor ZR is electrically connected with a pin of a third-level discharge tube GDT2, the other end of the capacitor C is electrically connected with the input winding L1 of the isolation transformer, three electrical connections of the pin of the third-level discharge tube GDT2, two pins and three pins of the third-level discharge tube GDT2 are connected with an output winding L2 of the isolation transformer, through the input winding L1, the ratio relationship between the output windings L2, the high-voltage signal transmitted to the third-level discharge tube GDT2 can be adjusted, and different scenes can be favorably adapted.

Wherein, the first pin of tertiary discharge tube GDT2 stretches out casing 1 is as live wire wiring end L, and the three pins of tertiary discharge tube GDT2 stretch out casing 1 is as zero line wiring end N, still be provided with earthing terminal E on casing 1, be convenient for this lightning protection module is connected with the device that outside was protected.

The working principle is as follows: this overvoltage lightning protection module that partial pressure triggered, during the use, whether have unusual high pressure to take place through the bleeder circuit that piezo-resistor ZR and electric capacity C are constituteed, wherein second grade discharge tube GDT1 is as trigger element, when voltage among the bleeder circuit reachs the settlement scope, second grade discharge tube GDT1 switches on after arousing, then input winding L1 and the ratio relation between output winding L2 through isolation transformer, to tertiary discharge tube GDT2 transmission high voltage signal, treat that tertiary discharge tube GDT2 switches on the back by high voltage signal trigger, external unusual high voltage energy is switched on the earthing terminal by GDT2, realize the earial drainage, avoid this high voltage energy to destroy by the protection device. The three-level discharge tube GDT2 is in an active trigger type, and when a high-voltage signal reaches a threshold value, the three-level discharge tube GDT2 is triggered to be conducted to generate leakage current.

Through the combination of the piezoresistor ZR and the capacitor C with different parameters, the type selection of the secondary discharge tube GDT1 and the ratio relation between the input winding L1 and the output winding L2 of the isolation transformer, the triggering range of the lightning protection module can be adjusted, and the accuracy is improved.

Example two

As shown in fig. 3, the structure of the present embodiment is substantially the same as that of the first embodiment, and the difference is: this embodiment the trigger unit includes secondary discharge tube GDT1, secondary discharge tube GDT 1's one end electric connection has resistance R1, parameter resistance R respectively, and the other end is connected with isolation transformer's input winding L1, resistance R1's the other end with tertiary discharge tube GDT 2's a pin electric connection, parameter resistance R's the other end with isolation transformer's input winding L1, tertiary discharge tube GDT 2's three electric connection of pin, tertiary discharge tube GDT 2's two and three and isolation transformer's output winding L2 of pin are connected.

The working principle of this embodiment is the same as that of the first embodiment, and whether an abnormal high voltage occurs in the power supply is detected by dividing the voltage through a voltage dividing circuit composed of a resistor R1 and a parameter resistor R, wherein the size of the parameter resistor R can be adjusted according to actual requirements.

Compared with the first embodiment, the two-stage discharge tube GDT1 in the present embodiment can be selected from a low voltage type, has a high leakage current but a large trigger signal, and has high adjustment accuracy and low cost.

EXAMPLE III

As shown in fig. 4, the structure of the present embodiment is substantially the same as that of the first embodiment, except that: this embodiment the trigger unit includes secondary discharge tube GDT1, secondary discharge tube GDT 1's both ends are connected with piezo-resistor ZR, isolation transformer's input winding L1's one end, isolation transformer's input winding L1's the other end and tertiary discharge tube GDT 2's pin three are connected, piezo-resistor ZR's the other end with a pin electric connection of tertiary discharge tube GDT2, isolation transformer's output winding L2 with tertiary discharge tube GDT 2's pin three, pin two are connected.

The working principle of this embodiment is similar to that of the first embodiment, except that the voltage dividing function is not present in this embodiment, and the high voltage type needs to be selected for the secondary discharge tube GDT 1.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lightning protection module capable of monitoring abnormal high-voltage signals comprises a shell (1), and is characterized in that a trigger unit and a three-level discharge tube GDT2 which are connected with each other are arranged in the shell (1), a protection unit for protecting the lightning protection module and a remote sensing unit for detecting trigger current in the trigger unit are further arranged in the shell (1);

the trigger unit comprises a secondary discharge tube GDT1, one end of the secondary discharge tube GDT1 is electrically connected with a piezoresistor ZR and a capacitor C respectively, the other end of the piezoresistor ZR is connected with an input winding L1 of an isolation transformer, the other end of the piezoresistor ZR is electrically connected with a pin of a tertiary discharge tube GDT2, the other end of the capacitor C is electrically connected with the input winding L1 of the isolation transformer and a pin of the tertiary discharge tube GDT2, and a pin II and a pin III of the tertiary discharge tube GDT2 are connected with an output winding L2 of the isolation transformer.

2. Lightning protection module capable of monitoring abnormally high voltage signals according to claim 1, characterized in that the internal gap of the casing (1) is filled with a flame-retardant filler (2).

3. The lightning protection module capable of monitoring abnormal high voltage signal according to claim 1, wherein a first pin of the three-stage discharge tube GDT2 extends out of the housing (1) as a live terminal L, a third pin of the three-stage discharge tube GDT2 extends out of the housing (1) as a neutral terminal N, and a ground terminal E is further disposed on the housing (1).

4. The lightning protection module capable of monitoring an abnormal high voltage signal according to claim 1, wherein a sensing switch K for monitoring the current of the secondary discharge tube GDT1 is arranged inside the remote sensing unit, two ends of the sensing switch K are respectively connected with a first terminal S1 and a second terminal S2 through wires, and the first terminal S1 and the second terminal S2 extend out of the housing (1) and are electrically connected with an external control circuit.

5. The lightning protection module according to any one of claims 1 to 4, wherein the trigger unit includes a secondary discharge tube GDT1, one end of the secondary discharge tube GDT1 is electrically connected to a resistor I R1 and a parameter resistor R, respectively, and the other end is connected to an input winding L1 of an isolation transformer, the other end of the resistor I R1 is electrically connected to a pin I of the tertiary discharge tube GDT2, the other end of the parameter resistor R is electrically connected to the input winding L1 of the isolation transformer and a pin III of the tertiary discharge tube GDT2, and the pin II and the pin III of the tertiary discharge tube GDT2 are connected to an output winding L2 of the isolation transformer.

6. The lightning protection module according to any one of claims 1 to 4, wherein the trigger unit includes a secondary discharge tube GDT1, two ends of the secondary discharge tube GDT1 are respectively connected to a voltage dependent resistor ZR and one end of an input winding L1 of an isolation transformer, the other end of the input winding L1 of the isolation transformer is connected to a pin III of a tertiary discharge tube GDT2, the other end of the voltage dependent resistor ZR is electrically connected to a pin I of the tertiary discharge tube GDT2, and an output winding L2 of the isolation transformer is connected to a pin III and a pin II of the tertiary discharge tube GDT 2.