Is Minrong s lightning rod any good? Is it better to use a pointed lightning rod or a blunt lightnin

The lightning arrester needle of Minrong is not bad.

In fact, lightning rods.

It is composed of three parts: flash receiver, grounding down conductor and grounding body. The flash receiver is usually made of round steel or steel pipe with a diameter of 15 20mm and a length of 1 2m, which is fixed at the upper end of the pillar and connected with the grounding body through the grounding lead.

Prevent buildings from being hit.

Therefore, lightning does not directly hit the lightning rod, and the lightning rod itself is also in danger of melting and ** if it is struck by lightning. The lightning rod has a certain protective effect.

Why is a pointed lightning rod so useful? The lightning protection effect is good.

It is the distribution of the charge on the surface of the charged conductor that is related to the shape of the conductor.

I don't know if the lightning rod of Minrong is good or not, but there was a debate about this in the early days of the lightning rod, and it was finally determined that the pointed lightning rod is better.

Why is a lightning rod with a pointed tip good?

Because the distribution of charge on the surface of a live conductor is related to the degree of shape of the conductor.

In the place where the surface is most curved, such as at the protruding tip, the electric charge is relatively dense, and the electric field in the nearby space is relatively strong; In places where the degree of surface curvature is relatively small, such as in a smooth place, the charge is relatively sparse, and the electric field in the nearby space is weaker. In the space near the tip, the air that was originally non-conductive is ionized due to the strong internal electric field. Air is electrically conductive when ionized, which causes the conductor to produce a discharge capacitance.

The phenomenon of an electric charge being emitted from the tip of a conductor is called tip discharge.

There was a debate about this in the early days of the lightning rod, and it was finally determined that a pointed lightning rod was better.

Why is a lightning rod with a pointed tip good? Because the distribution of the charge on the surface of a live conductor is related to the shape of the conductor. In places where the surface is most curved, such as at the protruding tip, the electric charge is denser, and the electric field in the nearby space is stronger; In places where the degree of surface curvature is relatively small, such as in a smooth place, the charge is relatively sparse, and the electric field in the nearby space is weaker.

In the space near the tip, the air that was originally non-conductive is ionized due to the strong electric field. Air is electrically conductive when ionized, which causes the conductor to discharge. The phenomenon of an electric charge being emitted from the tip of a conductor is called tip discharge.

Choose to directly use angle iron or galvanized pipe to drive into the ground as grounding, and it is better to consider using a circumferential lightning belt in the upper part.

However, the angle iron or steel pipe should be driven into the ground should not be less than, with 40 4 flat steel to connect the upper lightning belt, the lightning belt can be made of 12 round steel bars. It is best to find a shake meter and test the ground resistance, which should not be greater than the ohm. If it is not satisfied, another angle iron or steel pipe is driven into the next 1m to connect with the original and increase the grounding electrode area.

Whether to install a lightning rod to do a simple geometric analysis, the lightning rod protection range is simply a 45 degree angle, "my house is in the middle, both sides are higher than my house," the concept of the metal end of the ground on both sides of the building to draw down the 45 angles to cover your house, in this case, must cover your pot.

The lightning protection belt you are laying in your house is to protect the building, which is very correct. But lightning belts won't protect your antenna. In fact, it is very simple, weld a steel bar on the antenna pot, and the 45 height of the steel bar covers the high-frequency head. Then the antenna is welded with the lightning belt.

The lightning belt is released from a large area, and the lightning belt is definitely better than the lightning rod, and your house is a 3-story building, and the danger is not very great. If it's economical and you want to save a little, press the lightning rod.

The lightning rod can also be called a lightning catcher, and its main role can be seen from the name. The general practice of lightning protection in high-rise buildings: the roof is laid with lightning protection belts, which are installed openly or concealed, and lightning rods are concealed above the metal components on important equipment or roofs.

Super high-rise buildings should consider the problem of lightning protection, and generally lay pressure equalization rings along the perimeter of the building (this building is generally less than 30 meters does not need to be considered).

I think there must be a steel mesh on the roof of your house, and welding this with the steel bar of the column is a natural lightning protection belt, of course, to ensure the grounding effect of the steel grounding grid. If there is an antenna on the roof, or something else, you can follow a lightning rod and there is no problem with it.

The general practice of roof lightning protection belt: galvanized flat steel (generally 40 * 4, round steel can also be, not less than 12 two) made into a 10 * 10 meters or 12 * 8 meters grid, and then connected with the lightning protection down wire (if the steel bar of the column is connected to the grounding electrode), it is generally welded.

If you want to do lightning protection, a satellite dish on the roof is a must. After the grounding grid is done, it must be reliably connected with the grounding electrode and the earth in order to really play the role of lightning protection. If the foundation of your house is deep enough, and the steel bars of the foundation are in good contact with the earth, they can be used as grounding electrodes.

From the bottom to the top to select several groups of through the steel bar (not less than 12 can be selected two per group) as the lightning protection down line, all the grounding network should be reliably connected with the lightning protection down line, so as to form a complete and effective lightning protection system.

Generally, the connection of steel bars of small building structures is not impossible to use as lightning protection connections, but the effect is not good, if it is the trunk line is disconnected, the impact is great, if there are conditions, welding is highly recommended.

If the natural grounding electrode cannot meet the grounding requirements, it can be used as an auxiliary artificial grounding electrode. If possible, you can find a grounding shake meter to measure the grounding resistance, if it is not greater than 2 ohms, it can be accepted, and the design of large buildings will generally require the grounding resistance to be no more than ohms. The artificial grounding electrode can be driven into the ground by using the galvanized flat steel mentioned above, or the galvanized round steel (do not use rebar), depending on the grounding effect.

Lao He: For lightning protection in rural self-built houses, is it better to use lightning rods or lightning belts?

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If this problem is really solved, it will bring endless benefits to human life.

No matter what kind of lightning rod it is, they are very good at protecting buildings from lightning strikes. So, what is a lightning rod made of?

It turned out that the lightning rod was made of metal with good electrical conductivity, and its tip was made into a Y-shape and installed at the highest point of the building. A steel wire is connected to the bottom of the Y-shaped jujube and connected to the ground, and a metal plate is connected to the end of the wire, which is buried deep in the damp ground.

When a charged cloud in the sky approaches a building, the building will be charged with electricity opposite to the cloud due to the induction of the charged cloud. However, since the upper end of the lightning rod is pointed, the electricity induced by the building is released into the air at any time through the tip of the Y-shaped lightning rod, and the electricity in the cloud is slowly neutralized.

At the same time, most of the discharged current is transmitted underground along the wires of the lightning rod without damaging the building.

Why is the lightning rod installed on the roof of the building? That's because the charged cloud runs from top to bottom, and the lightning rod is at a high place, and when it comes into contact with the charged cloud first, it can release the electricity in the cloud first, and when the house comes into contact with the cloud, there is basically no or only a small amount of electricity in the cloud, so there is no danger. Buildings.

Of course, it is necessary to choose simple, practical and good, generally consider using lightning belts, install lightning rods as much as possible to use stainless steel or hot-dip galvanized materials, grounding must be done, if not done well grounding installation will exist after other risks,

Buy a round degree zinc tip as well.

Hello! Can be installed lightning protection device. But it's better not to install a lightning rod!

Because the lightning rod is a lightning guide device, when the lightning rod is struck by lightning, the lightning will attract a strong current through the lightning rod.

After the lightning rod is installed, it is necessary to make a down conductor (or through the steel bar of the building itself or a reserved equipotential connection device), and the lightning rod will direct the strong current to the earth and discharge. If a lightning rod is made, there is no device shunt to divert the current to the ground. This not only does not avoid lightning, but leads the thunder to the upper body.

Suggestion: First of all, check the roof to see if there is a lightning belt (that is, the steel bar extends to the roof wall fixed) If so, make an equipotential connection to the metal doors and windows of your attic (you can connect it with 16 square millimeters of copper wire, and the steel bar can also be used).

If there is electrical equipment or computers in the indoor study, it should also be grounded. Install a surge protector IN20KA at the main power supply at home, and use lightning protection socket in the study. Copper wire for grounding is led to metal doors and windows, so that household appliances, attic metal doors and windows, and lightning protection belts on the roof are equipotential connected.

Generally, the bathroom at home has equipotential connection terminals, which can also be grounded).

Stay away from doors and windows during thunderstorms.

You see if there are any buildings around your house that are significantly higher than your home, if there is and it is not very far away, it is not a big problem not to do it, if not, it is recommended to do it. Even if there is, for the sake of safety, it is better to do it, weld a circle on the roof of your roof with 10 galvanized round bar, and then weld it with the lightning protection net of the building, preferably two points. Or erect a steel pipe next to your house, the steel pipe is 2 meters higher than your house, and then weld the steel pipe to the lightning protection net of the building.

Summarizing so many answers, the premise is that you have a good grounding system, and the external lightning protection cannot undertake the task of direct lightning protection, so it will be a "lightning project", not a "lightning protection project". Remember... Don't mess around with the "needle" body and other flash receivers on the roof of your building...