Ask for advice on how to do lightning protection and grounding in the monitoring center

The lightning protection grounding of the monitoring center is simply understood from the text to how to be grounded, and how to ground the electrode is troublesome.

The simplest lightning protection and grounding of the monitoring center should be referred to.

1] Technical Code for Safety and Security Engineering GB 50348-2004

2] Design Standard for Intelligent Buildings GB T 50314-2006

4] "Engineering Technical Code for Civil CCTV System" GB50198-1994

6] "Requirements for Residential Community Security Technical Protection System" DB 3302 T1006-2007

The part about the computer room in the specification. It covers a wide range of topics, not one or two sentences.

Some of these excerpts will be used as an introduction.

Technical Code for Safety and Prevention Engineering GB50348 on several provisions of lightning protection and grounding design:

The safety protection device built in the mountainous area and wilderness, or the front-end equipment installed on the top of the tower, or the cable end is higher than the safety precaution system of the nearby building, shall be set up in accordance with the requirements of the current national standard "Code for lightning protection design of buildings" GB 50057.

The lightning protection design of the safety and security system built in the building should adopt the design principles of equipotential connection and common grounding system, and meet the requirements of the current national standard "Technical Code for Lightning Protection of Building Electronic Information System" GB 50343.

The grounding bus of the safety system should be made of copper wire, and the grounding terminal should be marked with the symbol of the ground wire. The ground resistance shall not be greater than 4; The grounding resistance of the safety and precaution system built in the field shall not be greater than 10; When the soil resistivity of alpine delay is greater than 2000·m, its grounding resistance shall not be greater than 20.

The power supply system, signal transmission line, antenna feeder of the security system of the high-risk protection object, and the overhead cable entry end of the monitoring room shall take protective measures against lightning induction overvoltage and overcurrent.

The power line and signal line of the safety system pass through the interface of different lightning protection areas, and the surge protector should be installed; Surge protectors should be installed on the critical equipment of the system. The grounding terminal of the surge protector and the lightning protection grounding device should be equipotential connected. The equipotential connection belt should be made of copper wire, and its cross-sectional area should not be less than 16m.

The monitoring center should be set up with a grounding ring or a row, and the ring or row should be bare copper wire, and the area of seven sections should not be less than 35m.

Cables shall not be laid on the roof of the building, and when they must be laid, they should be shielded and grounded through metal pipes.

Both ends of the overhead cable hanging wire and the metal pipe in the overhead cable cable should be grounded.

In the optical cable transmission system, the shell of each optical transceiver should be grounded. The reinforcing core of the optical end and the sheath of the overhead optical cable should be grounded.

1. Take corresponding isolation measures to prevent image interference caused by unequal ground potential.

2. Lightning protection measures should be taken for the connection cable of the camera installed outdoors.

Leave an email address, and I'll send you a plan.

There are three types of monitoring lightning protectors, power supply, signal, and control. Ordinary surveillance cameras do not have control lines, and the lightning protectors of power supply and signal are combined together, which is called power signal two-in-one lightning protector.

In the same way, the power supply part is also connected in series. But don't worry, the appearance is in series, the actual internal lightning protection module is connected in parallel with the line, as long as the connector is ***, there is no attenuation.

The yellow line you are talking about should be a yellow-green line, not a yellow line, which is the standard color of the ground line. It should be directly connected to the earth. It is used to release thunder and lightning into the earth.

The grounding wire connection:

Method 1: Connect with the lightning belt nearby.

Method 2: Knock open the cement and connect it with the main steel bar.

Method 3: If it is a steel pipe pole, connect it directly with the pole.

Method 4: Smash the ground with a meter steel pipe below, and then connect it.

Don't have an instruction manual? Just install it according to the manual. The grounding must be up to standard, less than 4 ohms.

Generally speaking, monitoring lightning protection is a series connection method, corresponding to an in and an out, some are directional, some are not, and there should be an indication on the lightning protection device. Shenzhen Haiyite Technology Development **** dedicated to your service.

The yellow line is the ground wire.

The ground wire is generally connected to the ground network of the building, if there is no ground network, it needs to be connected to the ground, and an iron drill is inserted into the ground at a depth of 1 meter. It is best to bury several iron drills in parallel into a mesh into the ground.

Use 6 square copper wires to connect to the grounding electrode, and the grounding resistance of the grounding electrode is less than 10 ohms. If it is not grounded, it is equivalent to not being installed.

Contact me directly, I have been working in lightning protection for more than 10 years. Bag you are satisfied!

Most of your "camera installation locations are on the roof or the top corner of the house", and it is very necessary to do a good job of lightning protection.

The grounding wire of the arrester is best to use a copper cable of more than 8 square mm, and the grounding point is selected in a relatively humid place, below the digging meter, and the grounding resistance should be less than 4 ohms.

In addition, most of your "camera installation location is on the roof or the top corner of the house", if the roof is not installed lightning rod, only the camera lightning protection grounding is not good, but also should be installed in the four corners of the roof lightning rod, the roof lightning rod can be welded to 2-4cm wide flat iron below 2 meters underground, grounding resistance should be less than 10 ohms.

kmyxf is right, don't believe the other two, just wait to be struck by lightning on the lightning belt, and the layman who says that the lightning protector does not need to be grounded is also a layman, and there is no place to vent if the lightning is not grounded. You look at whether the public land of the building is up to standard, you can use it if you meet the standard, and if you don't meet the standard, you have to redo the land yourself, if you need construction drawings, you can find me. Shenzhen Haiyite Technology Development ****.

Oh, you misunderstood, if you have a lightning arrester, you don't need to be grounded, and if you are grounded, you don't need a lightning arrester.

First of all, lightning protection grounding can completely use the steel bar in the building foundation as the grounding body, but the steel bar must be electrically welded together, and the vertical steel bar in the house column is used as the down wire, which has been connected with the roof lightning protection facility.

Secondly, many of the requirements to lead out one more steel bar is used to do artificial grounding, which is used when the building foundation itself can not meet the specified resistance requirements when the grounding can not be achieved, and even if the artificial grounding is done, the effect is much worse than the use of the building itself foundation to do the grounding body.

Therefore, the building foundation steel bar is directly used as the grounding body.

Note:1The foundation steel bar is well electrically penetrated, at least to ensure that the periphery is through, and the material of the crossover is 12mm round steel, and the welding length is about 150mm.

2.The average spacing of the down leads should be less than 25 meters, and if the house is not big, it would be good to have a down lead at each of the four corners.

3.Use two 16mm bars or four 14mm bars for each down lead.

It must be ensured that the down conductor connects the grounding body and the roof lightning protection device into one.

Good grounding is required, and the ground resistance is less than 4 ohms.

The surveillance camera is installed in the outdoor and open-air environment, it will be very susceptible to lightning strikes, which will seriously endanger the safety of the security system, so the system must need a perfect lightning protection and surge protection scheme.

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