CN104332982A - Lightning protection system - Google Patents

Abstract

The invention provides a lightning protection system, which includes: a power line protection system, a signal line protection system, and a grounding system, wherein the power line protection system and the signal line protection system are both used to reduce or eliminate surge surge voltage, the grounding system is used to lead the current generated by the surge voltage into the ground, and both the power line protection system and the signal line protection system are connected to the grounding system. Provide lightning protection for power lines and signal lines through the power line protection system, signal line protection system and grounding system, reduce or eliminate surge voltage, and prevent surge voltage from entering the indoor electronic equipment from power lines or signal lines, etc. Avoid damage to electronic equipment.

Description

A lightning protection system

technical field

The invention relates to the field of power supply system protection, and more specifically relates to a lightning protection system.

Background technique

In recent years, with the rapid development of information technology, various forms of electronic information systems such as communication equipment, computer networks and automatic control equipment have been more and more widely used. And communication monitoring equipment to carry out in an orderly manner. Lightning strikes are one of the natural disasters that occur every year. As the operating voltage of electronic equipment continues to decrease and the number and scale continue to expand, the possibility that the low-voltage power supply system may encounter lightning strikes is also increasing, and the consequences may interrupt the operation of the entire system. , and cause greater economic losses. Therefore, in the current situation of more and more complex power supply systems, the surge voltage of low-voltage power supply systems mainly caused by lightning has become an important topic of concern.

Among them, lightning rods on general buildings can only prevent direct lightning strikes. However, induced lightning and lightning wave intrusion cause greater harm. High-energy induced lightning and lightning electromagnetic pulses generated by strong electromagnetic fields pass through power supplies, antennas, and radio signal transceivers. Such lines sneak into the room and endanger electrical equipment such as TVs, telephones, and electronic instruments. In other words, surge voltage can enter indoor electronic equipment from power lines or signal lines. Therefore, it is necessary to effectively monitor the power supply system and signal system. Lightning protection measures.

Contents of the invention

In order to solve the above problems, the present invention provides a lightning protection system, which can weaken or eliminate the surge voltage and play a role of lightning protection for the power supply system and the signal system.

To achieve the above object, the present invention provides a lightning protection system, which includes a power line protection system, a signal line protection system and a grounding system;

Wherein, both the power line protection system and the signal line protection system are used to reduce or eliminate the surge voltage, the grounding system is used to guide the current generated by the surge voltage into the ground, and the power line protection system It is connected to the signal line protection system, and both the power line protection system and the signal line protection system are connected to the grounding system.

Preferably, in the above-mentioned lightning protection system, the power line protection system includes: a line inlet port, a distribution end and an equipment end connected in sequence, and the line inlet port, the distribution end and the equipment end are respectively installed Power surge protector.

Preferably, in the above-mentioned lightning protection system, the inlet port of the line selects a surge protector or a voltage-limiting surge protector that has passed the first-class classification test; the distribution end selects a voltage-limiting surge protector; The above-mentioned equipment side uses a voltage-limiting surge protector.

Preferably, in the above lightning protection system, the distribution end includes: a general power distribution end, and the general power distribution end selects NKP-DY-I-4P surge protector or NKP-DY-III-2P surge protector Protector, distribution terminal, the distribution terminal selects NKP-DY-II-4P surge protector.

Preferably, in the above-mentioned lightning protection system, the equipment side selects NKP-DY-IIIL surge protector or NKP-DY-IIIC surge protector.

Preferably, in the above lightning protection system, the signal line protection system is a video line protection system, an audio line protection system, a perimeter alarm signal system or a control line protection system.

Preferably, in the above lightning protection system, the grounding system includes an indoor grounding system and an outdoor grounding system;

The indoor grounding system includes an equipotential grounding busbar;

The outdoor grounding system includes: 6 vertical grounding electrodes, the 6 vertical grounding electrodes are respectively distributed on the 4 corners of the rectangular soil ditch and the midpoint of the two long sides; 5 horizontal grounding electrodes, the 5 The horizontal grounding electrodes are distributed on the center line of the two long sides, the two short sides and the long sides of the rectangular soil ditch, and the horizontal grounding electrodes are used for welding the 6 vertical grounding electrodes; the horizontal grounding of the center line pole as the PE ground terminal.

Preferably, in the above lightning protection system, the outdoor grounding system is 1.5m-3.0m away from the indoor grounding system, including endpoint values.

Preferably, in the above lightning protection system, the vertical ground pole is L5 galvanized angle steel with a length of 2.5m, and the horizontal ground pole is No. 4 galvanized flat steel.

It can be seen from the above description that the present invention provides a lightning protection system, which includes: a power line protection system, a signal line protection system, and a grounding system, wherein the power line protection system and the signal line protection system are used for The surge voltage is reduced or eliminated, the grounding system is used to guide the current generated by the surge voltage into the ground, and the power line protection system and the signal line protection system are both connected to the grounding system. Provide lightning protection for power lines and signal lines through the power line protection system, signal line protection system and grounding system, reduce or eliminate surge voltage, and prevent surge voltage from entering the indoor electronic equipment from power lines or signal lines, etc. Avoid damage to electronic equipment.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic diagram of a lightning protection system provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of a power line protection system provided in an embodiment of the present application;

Fig. 3 is a schematic diagram of a distribution terminal provided in the embodiment of the present application;

Fig. 4 is a schematic diagram of a grounding system provided in an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As mentioned in the background technology, the existing lightning protection technology generally can only prevent direct lightning strikes. For electronic information systems, generally including power lines and signal lines, it can only prevent direct lightning strikes and lightning protection methods cannot protect electronic equipment on power lines and signal lines. Take effective protection.

In order to solve the problems in the prior art, the present invention provides a lightning protection system for electronic information systems, the electronic information systems can be power supply systems, video monitoring systems, video intercom systems, parking management systems, Or public address background music system.

As shown in Figure 1, the lightning protection system described in this application includes: a power line protection system 101 for protecting the power line of the electronic information system; a signal line protection system 102 for protecting the signal line of the electronic information system and a grounding system 103.

Wherein, the power line protection system 101 and the signal line protection system 102 are both used to reduce or eliminate surge voltage. When a lightning strike occurs, a surge voltage will be generated in the power line and the signal line, and the surge voltage will cause damage to the electronic equipment of the power line and the signal line. The power line protection system 101 can prevent the electronic equipment of the power line from Due to the damage caused by the surge voltage, the signal line protection system 102 can prevent the electronic equipment of the signal line from being damaged due to the surge voltage.

The grounding system 103 is used to lead the current generated by the surge voltage into the ground, the power line protection system 101 is connected to the signal line protection system 102, and the power line protection system 101 is connected to the signal line protection system 102 are all connected to the grounding system 103, and the grounding system 103 is grounded so that the current generated by the surge voltage is grounded.

As shown in FIG. 2 , the power line protection system 101 includes: a line inlet port 111, a distribution port 112, and an equipment end 113 connected in sequence. Install a power surge protector separately. A surge protector or a voltage-limiting surge protector that has passed the first-class classification test is selected at the line inlet port 111; a voltage-limiting surge protector is selected at the distribution end 112; a voltage-limiting type surge protector is selected at the equipment end 113 surge protector. The surge protector of the above-mentioned setting type can effectively protect the electronic equipment of the power line of the electronic information system, and weaken or eliminate the lightning strike accident caused by the surge voltage generated by the lightning strike.

Wherein, the line inlet port 111 , the distribution port 112 and the equipment port 113 are all connected to the grounding system 103 . The line entry port 111 is used to connect to a power supply, and the power supply supplies power to the equipment port 113 through the distribution port 112 . The device end 113 is connected to the signal line protection system 102 for receiving signals.

When the induced lightning and lightning waves cause surge voltage in the power system, the surge protectors corresponding to each part will be turned on in a short time immediately, and the amplitude of the surge voltage will be within the safe working range of the equipment. , At the same time, the surge energy is released into the ground, and then the surge protector quickly becomes a high-impedance state, so as not to affect the normal power supply. Among them, the line inlet port 111 refers to the inlet port of the user's power supply system, and the surge protector used in the first-level classification experiment can prevent 10/350μs and 100KA lightning waves. The purpose of installing a surge protector or a voltage-limiting protector for the first-class classification experiment at the line inlet 111 is to discharge the direct lightning current and limit the surge voltage of tens of thousands to hundreds of thousands of volts to 2500-3000 volts . The purpose of selecting a voltage-limiting surge protector at the distribution end 112 is to limit the residual surge voltage of the surge protector that has passed the first-class classification test to 1500V-2000V. For example, NKP-DY is usually used for floor power distribution. -III-2P surge protector. The voltage-limiting surge protector selected by the equipment terminal 113 reduces the residual surge voltage to less than 1000 volts, and finally protects the terminal equipment.

With reference to Fig. 3, described distribution terminal 112 comprises: total distribution terminal 121, and described total distribution terminal 121 selects NKP-DY-I-4P surge protector for use; Distribution terminal 122, described distribution terminal 122 Choose NKP-DY-II-4P surge protector or NKP-DY-III-2P surge protector, and the device terminal 113 chooses NKP-DY-IIIL surge protector or NKP-DY-IIIC surge protector . Wherein, the general distribution terminal 121 is connected to the line inlet terminal 111 , and the distribution terminal 122 is connected to the equipment terminal 113 .

Corresponding to different electronic information systems, the signal line protection system 102 is a video line protection system, an audio line protection system, a perimeter alarm signal system or a control line protection system. Taking the video surveillance system as an example, a high-speed dome camera and a bolt camera without a pan/tilt are respectively installed outdoors. According to the characteristics of these two cameras, in addition to using the power line protection system 101, the high-speed dome machine also uses the video line protection system and The control line protection system is used for protection, and the lightning protector selected is NKP-TEL-4C-3a; the bolt without pan/tilt is protected by the video line protection system, and the lightning protection device selected is NKP-TEL-4C-2a. Taking the public broadcasting background music system as an example, the speakers and sound columns are exposed to the outdoors for a long time, so in the thunderstorm season, the possibility of being damaged by lightning is very high. And the overvoltage of the terminal is protected, and the audio line protection system is installed on the front end of the speaker and the sound column, that is, the audio line, to protect it, that is, the surge protector NKP-DY-IIIL-D110 is used.

The grounding system occupies a very important position in the entire lightning protection system, so the success of a lightning protection project depends on the grounding system, and the outdoor grounding and indoor grounding are carried out at the same time, and the outdoor grounding system and the indoor grounding system are connected. As shown in FIG. 3 , the grounding system includes an indoor grounding system 201 and an outdoor grounding system 202 .

The indoor grounding system 202 includes an equipotential grounding busbar. The outdoor grounding system 201 includes: 6 vertical grounding electrodes 203, the 6 vertical grounding electrodes 203 are respectively distributed on the 4 corners of the rectangular soil ditch and the midpoint of the two long sides; 5 horizontal grounding electrodes 204, The five horizontal ground electrodes 204 are distributed on the two long sides, two short sides and the center line of the long side of the rectangular soil ditch, and the horizontal ground electrodes are used for welding the six vertical ground electrodes 203; The horizontal ground electrode 204 of the neutral line serves as the PE ground terminal. Using the horizontal grounding electrode 204 as the PE grounding terminal makes the implementation of the outdoor grounding system 201 simple.

The distance between the outdoor grounding system 202 and the indoor grounding system 201 is 1.5m-3.0m, including endpoint values. At this time, the indoor and outdoor grounding systems can be effectively connected to achieve effective lightning protection.

In this embodiment, the length×width of the rectangular soil ditch can be set as 6m×3m. The rectangular frame line width of the rectangular soil ditch is 0.8m, and the depth of the rectangular soil ditch is 0.6m-0.8m. The vertical ground electrode 203 is L5 galvanized angle steel with a length of 2.5m, and the horizontal ground electrode 2504 is No. 4 galvanized flat steel. Lead the No. 4 galvanized flat steel welded in the middle of the ground grid frame to the outer corner of the machine room, 0.3 meters above the ground, and use it as the PE grounding end; Enter the room through the wall, and connect to the equipotential grounding busbar of the indoor grounding system 202, such as the equipotential grounding busbar in the machine room. By adopting the above design, the grounding of the lightning strike current can be effectively realized, and the material cost is low.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A lightning protection system, comprising: a power line protection system, a signal line protection system and a grounding system; Wherein, both the power line protection system and the signal line protection system are used to reduce or eliminate the surge voltage, the grounding system is used to guide the current generated by the surge voltage into the ground, and the power line protection system It is connected to the signal line protection system, and both the power line protection system and the signal line protection system are connected to the grounding system. 2. The lightning protection system according to claim 1, characterized in that, the power line protection system comprises: a line inlet port, a distribution end and an equipment end connected in sequence, at the line inlet port, the distribution end And a power surge protector is respectively installed at the equipment end. 3. The lightning protection system as claimed in claim 2, characterized in that, the inlet port of the line selects a surge protector or a voltage-limiting surge protector that has passed the primary classification test; the distribution terminal selects a voltage-limiting surge protector. type surge protector; the equipment side uses a voltage-limiting type surge protector. 4. lightning protection system as claimed in claim 3, is characterized in that, described distributing terminal comprises: total distribution terminal, and described total distribution terminal selects NKP-DY-I-4P surge protector or NKP- DY-III-2P surge protector, distribution terminal, the distribution terminal uses NKP-DY-II-4P surge protector. 5. The lightning protection system according to claim 3, characterized in that NKP-DY-IIIL surge protector or NKP-DY-IIIC surge protector is selected at the equipment end. 6. The lightning protection system according to claim 1, wherein the signal line protection system is a video line protection system, an audio line protection system, a perimeter alarm signal system or a control line protection system. 7. The lightning protection system according to claim 1, wherein the grounding system comprises an indoor grounding system and an outdoor grounding system; The indoor grounding system includes an equipotential grounding busbar; The outdoor grounding system includes: 6 vertical grounding electrodes, the 6 vertical grounding electrodes are respectively distributed on the 4 corners of the rectangular soil ditch and the midpoint of the two long sides; 5 horizontal grounding electrodes, the 5 The horizontal grounding electrodes are distributed on the center line of the two long sides, the two short sides and the long sides of the rectangular soil ditch, and the horizontal grounding electrodes are used for welding the 6 vertical grounding electrodes; the horizontal grounding of the center line pole as the PE ground terminal. 8. The lightning protection system according to claim 7, wherein the outdoor grounding system is 1.5m-3.0m away from the indoor grounding system, inclusive. 9 . The lightning protection system according to claim 7 , wherein the vertical ground pole is L5 galvanized angle steel with a length of 2.5 m, and the horizontal ground pole is No. 4 galvanized flat steel.