Metal commodities HS code directory

List of contents of this article:

• 1,Metal commodities HS code directory How do outdoor cameras protect against lightning?? Ask for answers
• 2, How does the camera on the top of the mountain protect against lightning?
• 3, How to take lightning protection measures for security monitoring system
• 4, How to prevent lightning in the monitoring system??
• 5, How to do network camera lightning protection?

How do outdoor cameras protect against lightning?? Ask for an answer

1. The outdoor camera of the security system can only be protected by an independent lightning rod to prevent direct lightning strikes. The camera cannot be installed on the lightning rod body, and the camera pole should not be made into a lightning rod. The camera should be insulated from the pole and must not be connected to the ground; 2) The security system does not allow multi-point grounding, and the front-end camera must be insulated from the earth.

2. Well, in general, outdoor cameras now, if the pole is vertical, a lightning rod is added to the pole and grounded through the channel inside the pole. At the same time, the camera itself uses a lightning arrester for lightning protection. If there is no vertical pole, it is a lightning protection device installed at the camera end. To choose a lightning arrer, you need to look at the camera interface and voltage.

3. If there is no tall construction around, or the camera gun is in the LPZOA area, the camera gun should be equipped with a lightning rod. The lightning rod is generally made of hot-dip galvanized round steel or carbon steel rod. The camera gun is located in the LPOB area, that is, when the lightning of a tall building around it will not hit the camera directly, you only need to install the power supply and signal line of the camera gun with lightning protection equipment.

4. Simple lightning protection steps for outdoor vertical pole camera: the grounding body at the bottom of the lightning rod is installed at the top of the vertical pole, and the grounding body at the bottom of the vertical rod is not less than 5-2 meters, and the lightning rod, and the grounding body are welded to be firmly conductive.Install and monitor the two-in-one or three-in-one lightning protection device, and the lightning protection ground wire connection grounding body.

5. Choose a reasonable lightning protection circuit design scheme and reasonably arrange the external interface; (2) Correctly handle the connection between the equipment system and the lightning protection site. Choosing devices with high surge protection level is an effective way to improve the lightning protection ability of the camera, which means increasing the cost.

6. In RS-48Ethernet, POE and other ports in security equipment, Langtuo Lightning Protection Company has a series of perfect lightning protection schemes.

How to protect the lightning of the camera overhead on the top of the mountain?

1. Lightning protection of front-end equipment: There are two distribution methods of front-end equipment: outdoor and indoor. The indoor distribution generally will not be directly struck by lightning, but it is necessary to consider preventing lightning overvoltage from affecting the equipment, while outdoor equipment should also be considered to prevent direct lightning strikes.

2. The outdoor camera of the security system can only be protected by an independent lightning rod to prevent direct lightning strikes. The camera cannot be installed on the lightning rod body, and the camera pole should not be made into a lightning rod. The camera should be insulated from the pole and must not be connected to the ground; 2) The security system does not allow multi-point grounding, and the front-end camera must be insulated from the earth.

3. The direct lightning protection of the camera should be considered from two aspects. If the camera is in an open area, there are many minefields, and there are no tall buildings around, a lightning rod should be installed on the support pole of the camera as a direct lightning protection for the surveillance camera.

4. Well, in general, outdoor cameras now, if the pole is vertical, a lightning rod is added to the pole and grounded through the channel inside the pole. At the same time, the camera itself uses a lightning arrester for lightning protection. If there is no vertical pole, it is a lightning protection device installed at the camera end. To choose a lightning arrer, you need to look at the camera interface and voltage.

5. Lightning protection of front-end equipment There are two cases of front-end equipment: outdoor and indoor installation. The equipment installed indoor generally will not be directly struck by lightning, but it is necessary to consider preventing lightning and lightning overvoltage from infringing the equipment, while outdoor equipment also needs to consider preventing direct lightning strikes.

6. Usually, the front-end equipment such as the camera is placed within the effective protection range of the flasher (lightning rod or other flash conductor). When the camera is erected independently, in order to prevent the lightning rod and the transient high potential on the lead line, the lightning rod should be 3-4 meters away from the camera.

How should the security monitoring system take lightning protection measures

Thunderstorm weather, how to take lightning protection measures for security monitoring equipment? Weak electric bright son shares 3 points.

Direct lightning protection: Review and use the existing lightning protection conditions of Party A's buildings (must have passed the acceptance), and set the security equipment within the effective protection scope of Party A's building lightning protection system as much as possible.

Install a lightning rod and protect the equipmentHold an angle of 45° to form protection. It is enough to introduce the lightning rod to the ground with a ground cable. It is also necessary to install lightning protection equipment for the video signal and monitoring power supply to prevent lightning strikes from damaging the monitoring host and the computer room equipment.

The direct lightning protection of the camera should be considered from two aspects. If the camera is in an open area, a multi-mine area, and there are no tall buildings around, a lightning rod should be installed on the support of the camera as a direct lightning protection for the surveillance camera.

How to prevent lightning in the monitoring system??

To make a weak current system lightning protection, it is generally divided into four aspects, namely the installation of lightning arr, grounding, line shielding, and other potentials. We discuss these four aspects separately. Installing lightning protection system. Installing lightning protection includes the installation of power supply lightning protection and signal lightning protection.

From the perspective of lightning protection, the direct burial laying method has the best protection effect. The overhead line is the most vulnerable to lightning strike, and it is destructive and has a wide range of impact. In order to avoid damage to the first and tail equipment, the overhead line should be grounded on each pole when transmitting, and the hanging line of the overhead cable and the metal pipe in the line should be connected. Land.

National Standard for Lightning Protection and Grounding GB 50343-2012 Technical Specifications for Lightning Protection of Buildings Electronic Information System GB 50057-2010 Specifications for Lightning Protection for Buildings and Lightning Protection Specific Standards Specific Requirements for this project is for monitoring system lightning protection, including The rod directly hits the lightning protection and the monitoring system power system protection.

The video surveillance system mainly transmits signal lines and power lines. The safest wiring method should be through the metal pipe and buried in the ground throughout the whole process. At the same time, it should be noted that both ends of the metal pipe must be effectively grounded.The power supply of the camera is generally ac220v or dc12v.

Direct lightning protection: Review and use the existing lightning protection conditions of Party A's buildings (must have passed the acceptance), and set the security equipment within the effective protection scope of Party A's building lightning protection system as much as possible.

Second-level lightning protection, third-level lightning protection, absorb lightning surges step by step. The second is signal lightning protection (including video signals and RS485 control signals), and the signal anti-surge protector is used to introduce the surge current induced on the signal line into the ground network through the ground wire. The combination of power supply lightning protection and signal lightning protection can effectively protect the monitoring system from lightning strikes.

How to do network camera lightning protection?

1. From the perspective of lightning protection, the direct burial laying method has the best protection effect. The overhead line is most susceptible to lightning strikes, and it is destructive and has a wide range of impact. In order to avoid damage to the head and tail equipment, grounding should be done on each pole when the overhead line is transmitted, and the hanging line of the overhead cable and the metal pipe in the line should be grounded.

2. Therefore, doing a good job in the line protection connected to the system is a part of the overall lightning protection that cannot be ignored. The video surveillance system mainly transmits signal lines and power cables. The safest wiring method should be through the metal pipe and buried in the ground throughout the whole process. At the same time, it should be noted that both ends of the metal pipe must be effectively grounded. The power supply of the camera is generally ac220v or dc12v.

3. Hello, poster: If your surveillance camera is higher than the trees and houses next to it, you can directly find a metal rod 20 cm higher than the camera and install it near the camera, and then introduce the ground wire.

4. The lightning protection CCTV system of the transmission line is mainly the transmission signal line and power line. The power supply of the outdoor camera can be introduced from the terminal device or from the power supply near the monitoring point. The control signal transmission line and the alarm signal transmission line are generally selected from the core shielding soft cable, which is installed (or laid) between the front end and the terminal.

5. On this basis, an accurate and systematic lightning protection solution can be given by selecting a suitable lightning protection device, researching and exploring reasonable signals, power line wiring, and clarifying shielding and grounding methods. The main reason for the damage caused by lightning damage to the monitoring security system (1) Direct lightning strike.

6. All lines (power supply, video, control) connected to the camera are equipped with corresponding lightning arrres (monitoring comprehensive lightning armper three-in-one or two-in-one).Secondly, the grounding of the lightning guard and camera metal shield should be done well. The above is only the lightning protection of the camera. If you need to monitor the lightning protection of the system, you need to pay attention to many other items.