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Operating principle of lifting lightning arrester absorbing and storing atmospheric electric field e

Time:2020-09-08 View:

What is the operation principle of Xuesong NJXD lifting lightning arrester? Conventional lightning protection can be divided into direct lightning protection, induction lightning protection and comprehensive lightning protection. Lightning protection equipment for preventing direct lightning usually consists of three parts, namely lightning arrester, lead-down line and grounding body; Lightning arrester is divided into lightning arrester, Lightning arrester, Lightning arrester belt and lightning arrester net. The lightning protection principle of using lightning arrester as lightning arrester is:
The Lightning arrester is connected to the ground through the wire, forming equal potential difference with the ground, using its own height to make the electric field strength increase to the limit of the Lightning Cloud electric field distortion, start ionization and downstream lead discharge; under the effect of strong electric field, the Lightning arrester will discharge at the top level, which will form the upward lead discharge; The two will form the lightning path, and then flow into the earth to reach the lightning protection effect. In practice, Lightning arrester is a lightning rod, which can lead the surrounding lightning and discharge early, and transmit the lightning current to the ground through its own grounding conductor to prevent the maintenance policy from being directly struck by lightning.
The simple explanation is: the effect of lightning arrester is the same as that of umbrella covering the rain for everyone, covering the construction equipment within a certain scale. Once lightning enters the umbrella-like scale, lightning will be attracted by the lightning arrester, and then it will leak through the body, and then the construction below the umbrella will not be struck by lightning.
Lightning arrester and there are a grounding wire, it is through the protection policy of the dominant position to the other in the dominant position or the ground connecting the lead wire of the lightning, its protective effect is equivalent to that every point on the SAG is a lightning arrester of equal height. Later, the lightning protection belt was developed, which is to use metal belts on the parapet or roof and Eaves around the roof as lightning sensors to prevent lightning, just like what you said.
The protection principle of the lightning protection belt is the same as that of the lightning protection line, because its Lightning connection area is large, and the electric field intensity in the space adjacent to the Lightning connection equipment is relatively strong, which is simpler to attract the Lightning lead, this greatly reduces the probability of nearby objects that are especially lower than it being struck by lightning. Later, lightning protection network, clear network and dark network were developed.
Open Net is a net made by adding metal wire to the center of the lightning protection zone, and then it passes through the lightning protection between metal objects with large cross-sectional area and the Earth to maintain the center of the building. The dark net is to use the steel net in the reinforced concrete structure of the building for lightning protection, only the steel bar in the floor slab of each floor has a solid electrical connection with the steel bar in the beam, column and wall, and it has excellent electrical connection with the platform and the ground pile, forming a firm dark net, then this method is more useful than other protective equipment.
How does the lightning arrester act?
When the thunderstorm comes, the burst energy is appropriate infinite (reaching several kV per meter), and the air terminal of the pre-discharge arrester in the early stage absorbs energy from the electric field in the natural world, the lower-end energy collection electrode stores electric energy in the lightning protection trigger device. Before the lightning attack, the field strength will increase rapidly. When the energy stored in the Lightning arrester reaches a certain level, the air terminal will send the information to the Lightning arrester electric trigger equipment, sparks will occur at the top of the air terminal, and the air around the top will be ionized, forming the top discharge scene.

4.1 for absorbing and storing atmospheric electric field energy
In Section 3.3.3 of "principles of planning", "theoretical basis and principle description of Yi dilei's discussion", it is written as follows:
"When the storm drops temporarily, the equipment absorbs the energy in the atmospheric electric field through the bottom electrode and stores it in the internal electronic circuit. When the charge reaches a certain degree, it discharges through the upper electrode, an ion layer with opposite strong cloud charges is formed around its top level....... This strong ionization discharge attack of Yi dilei is the early lead of upward emission......."
The demand points out that the energy density of atmospheric electrostatic field is very low. For example, when the electric field intensity before the lightning strike is about to attack is 40kV/m, the energy density of the space atmospheric electric field is only 4'10-9 jiaoer/cm3.
We know that when a metal object is put into the electrostatic field, it will distort the original electric field. Moreover, because of the conductivity of the metal and the equipotential of the surface, the electric field intensity in the metal body is always equal to zero. If we want to absorb the energy of atmospheric electrostatic field and store it to the required quantity by relying on the bottom electrode of "Yi di Lei" and under the condition of being forced to do work without external force, and constantly use this energy to generate spark discharge. In principle, it is untenable and impossible. If we can plan a kind of machinery or an electronic circuit to absorb electrostatic field energy, concentrate and store it for practice without external force, that is no different from making a perpetual motion machine. It is even more nonsense to rely on this stored energy to lead the attack upward.
"Principles of planning" also said:
"When the charging electric field gradient in its electronic equipment, namely dv (electric field variation)/dt (time distance) reaches a certain ratio, ionizing discharge forms an upward pilot,...... 'Lightning ing' is conditional. When dv/dt reaches a certain determined share, the attack occurs. At this moment, the electric field strength reaches 400-500kV/m."
Here, planning principles describe dv/dt as electric field gradient, which is a conceptual or essential fault. dv/dt is not an electric field gradient, but the change rate of voltage with time. It is not energy and cannot be "charged" into an electronic device.
According to the principle of planning, the condition of lightning induction is that "the electric field strength reaches 400-500kV/m". May I ask, where does the electric field reach this value? The demand points out that lightning discharge is formed before the intensity of space electric field reaches this value. Is it OK for "Yi dilei" to wait until the electric field strength reaches? "Principles of planning" lacks the least common sense of atmospheric discharge.

 

4.2 for the experiment of Qianxian moment
In the definition of "planning principle", "start the first time DT" is:
DT=TSR-TESE
The separation of TSR and TESE is the "uniform moment of continuous transmission of uplink pilot charges" between the lightning arrester and the Lightning arrester of "Yi di Lei". Here, what is said in "planning principles" is that the lightning arrester of "Yi di Lei" is shorter than the "uniform moment of continuous transmission of uplink pilot charges" of the usual lightning arrester, this short time difference is the so-called "first time".
The terminology used in "Principles of planning" here is so awkward that not only ordinary users cannot understand it, but also professionals feel confused and unique. It was not until I read all the experimental materials that I knew that the so-called "time of continuous transmission of uplink pilot charges", in professional terms, was the time to breakdown of impulse discharge.