Is it normal for the lightning protection grounding resistance value to be only 0 05?

Hello, it is normal for lightning protection and grounding resistance to Europe, and it also meets the requirements of relevant technical standards. The ground resistance value should not be too high, and it is normal to be a little lower.

In general, the resistance value of the lightning protection grounding wire should be as small as possible, and only ohms should be within the normal range.

If the lightning protection and grounding resistance value is only, this is a very normal value, indicating that the line connection is OK.

The lightning protection and grounding organization is considered normal, and it can play an effective role in lightning protection, and it does not need to be too high.

The lightning protection grounding resistance value is only, this should be normal, as long as he is within the normal range, although he is a little small, but there is no problem.

The ground resistance value is only considered normal, and it should be within his range.

Normal. The lightning protection grounding resistance is normal within 0 10 ohms.

If the lightning protection and grounding resistance value is only, it is normal, because the smaller the resistance, the better.

If the grounding resistance of lightning protection is only 0.05, I think this is very normal, as long as it is not greater than four ohms, it should be regarded as normal grounding.

The lightning resistor is only abnormal. The minimum should not be less than the second ohm.

Hello, the lightning protection grounding resistance value is only very normal, you can pour some salt water, thank you.

Of course, the words of this organization are normal, and under normal circumstances, as long as the lightning protection and grounding organization is smaller, it is okay to do it within.

I just checked the information related to you and showed that this is normal.

Normally, the smaller the grounding resistance of lightning protection grounding, the better.

Feng Lei, is al-Qaeda only considered normal? The resistance of the grounding wire is small, which is of certain benefit to the mine, otherwise the tail mine will cause trapping, mainly because the organization of the arrester should be normal.

Grounding resistance is an important parameter used to measure whether the grounding state is good, is the resistance encountered when the current flows into the earth from the grounding device and then flows to another grounding body or spreads to a distant distance through the grounding device, it includes the resistance of the grounding wire and the grounding body itself, the contact resistance between the grounding body and the earth, and the resistance of the earth between the two grounding bodies or the earth resistance of the grounding body to infinity.

If you say that the grounding resistance you measure is the grounding of the building foundation, this resistance is reliable. But if you look at the measurements after the rain, the values are definitely low.

This is likely to happen if you hit the net. Or a very small resistance value like this.

If it is the same pile, this kind of problem occurs in different equipment, and it is estimated that it is possible to unite zero and ground.

The impact grounding resistance is mainly considered when the grid is hit by a large current. Generally, the power grid is hit by large currents, mainly when lightning strikes, flows. The grounding resistance detected by the lightning protection center is mainly the impact grounding resistance.

There is only a lightning protection ground host, is it a normal meal? Then the weakening of this chick is equivalent to a small gain, and this fourth level is normal to go above.

Is the lightning protection grounding organization only considered normal? I think you should look at the manual, or other information, to see if it's normal? I guess it's probably normal!

According to the provisions of "Grounding Device Installation", "Railway Digital Microwave Communication Engineering Design Code", "Building Lightning Protection Facilities Installation", "Building Electronic Information System Lightning Protection Technical Specification", "Construction and Acceptance Code of Grounding Device", lightning protection grounding resistance should be less than or equal to 10 ohms.

The lightning protection grounding resistance is rarely said to be less than, generally should not be greater than how much, and the grounding of the general building is not greater than four ohms. However, special communication equipment rooms need to be grounded in order to realize the shunt and discharge of energy during lightning strikes, so the general grounding resistance should be less than 5 ohms. Joint grounding, so generally the grounding resistance should be less than 5 ohms.

The lightning protection grounding resistance value is determined according to the actual situation, and the sum of the grounding resistance of the grounding body or the natural grounding body is called the grounding resistance of the grounding device, and its value is equal to the ratio of the grounding voltage of the grounding device to the current flowing into the ground through the grounding body. At the same time, the grounding resistance is also a sign to measure the level of the grounding device.

It can be measured by a grounding resistance meter, which is used to measure the grounding resistance of grounding devices such as protective grounding, working grounding, anti-overvoltage grounding, anti-static grounding and lightning protection grounding, that is, the resistance presented when the grounding device flows through the power frequency current, including grounding wire resistance, grounding body resistance, contact resistance between grounding body and earth and earth dispersion resistance.

The lightning protection ground resistance is within 4 ohms.

The lightning protection ground resistance value refers to the ground resistance in the grounding system used to prevent lightning strikes. The resistance between the ground electrode and ground is the resistance between the ground electrode and the ground, which plays a key role in effectively introducing lightning or other currents into the ground.

According to the International Electrotechnical Commission (IEC) specifications, different types of grounding systems have different grounding resistance requirements. According to IEC 60364 standard, the grounding resistance of general buildings should be less than 10 ohms. For high-rise buildings, to better protect the building and people from lightning strikes, the ground resistance requirement is lower.

Ground resistance is generally required to be less than 5 ohms or less.

For locations that are very sensitive to electromagnetic interference and lightning strikes, such as medical facilities, electronic equipment manufacturing plants, etc., the ground resistance requirements are often more stringent and may need to be 1 ohm or less.

It should be noted that the measurement of grounding resistance needs to be carried out by professional testing instruments and should be carried out under appropriate geological and environmental conditions to ensure accuracy and reliability.

In short, the requirements for lightning protection grounding resistance value vary depending on different places and needs, but the grounding resistance is generally required to be less than 10 ohms. Specific requirements should be determined in accordance with the relevant standards and specifications and tested under appropriate conditions.

The role of lightning protection grounding resistors

1. Disperse lightning energy: When lightning hits buildings or other facilities, the lightning protection grounding resistance can effectively disperse the lightning energy to the ground through a good grounding connection. This avoids direct damage to buildings and equipment by lightning.

2. Protect the safety of equipment and personnel: The grounding resistance can safely guide the lightning energy to the ground, reducing the risk of lightning damage to the equipment and the injury of personnel. A safer working environment can be provided through a reasonable grounding system design.

3. Stable equipment operation: When lightning strikes a building or equipment, it may cause instantaneous changes in voltage and current, resulting in equipment failure or damage. With a good grounding system, these voltages and currents can be effectively dispersed and dissipated, and the stable operation of the equipment can be maintained.

4. Baoxingshan Combustion Protection Telecommunication System: Lightning protection and grounding resistance is very important for the normal operation of the telecommunication system. It can provide good grounding protection to avoid interference and damage to telecommunication equipment and communication lines by lightning.

Dear, it's a pleasure for you to ask the thick spine question! How to achieve lightning protection and grounding, please refer to the following steps" 1. Lightning protection is divided into overall structure lightning protection, that is, the lightning protection of the main house, and the main foundation is grounded electrode and grounding belt to form a grounding network, and the grounding resistance is less than 10 ohms. Then it is connected with the main body of the steel bar or steel structure of the main house.

The cement concrete roof is connected to the lightning belt or lightning rod, and the ground outside the wall must also have a grounding test point, and the steel structure should be directly led to the roof with galvanized flat iron. 2. The grounding of the power supply system is divided into protective grounding and working point grounding, and the protective grounding is the grounding of the shell of the live equipment. The grounding of the working point refers to the grounding of the zero line, and the grounding network is the same as the lightning protection grounding method, and the grounding resistance is less than 4 ohms.

If the requirements are not met, the grounding electrode should be added, and if the conditions are not good, electrolyte should be added and/or the soil should be replaced. The working grounding and protective grounding are independently led out in the distribution room, and the opening and blocking system can be one. The working mode, such as the separation of the ground wire and the neutral wire, can also be combined into one to lead to the electric system (or equipment) with a quiet stool.

The grounding system must be grounded repeatedly. There is also an independent separate way, the TN-C system. Ground zero can no longer be one.

3. Instrumentation grounding system. The system has a ground resistance of less than 1 ohm. It cannot be connected to lightning protection ground.

Fourth, anti-static grounding, such as tubing, etc., every 35 meters (elbow) must have a reliable grounding (the system can also be independent), the resistance is less than 30 ohms.

1. The grounding resistance of independent lightning protection should be less than or equal to 10 ohms.

2. The grounding resistance of independent safety protection should be less than or equal to 4 ohms.

3. The independent AC working grounding resistance should be less than or equal to 4 ohms.

4. The grounding resistance of the independent DC industrial roller pin should be less than or equal to 4 ohms.

5. The anti-static grounding resistance is generally required to be less than or equal to 100 ohms.

6. The common grounding body (joint grounding) should not be greater than the grounding resistance of 1 ohm.

The shell of electrical equipment must be grounded, and there are generally the following requirements for its grounding:

1. The metal shell of the protected electrical equipment should be grounded separately.

2. The grounding of the metal shell of the electrical equipment of the protected electric single-beam crane should be separated from the grounding of the neutral point of the power supply.

Test the effectiveness of lightning protection devices, the connectivity of flash connectors, down conductors, grounding devices, etc.

The effective grounding resistance of the grounding system requires 10.

Whether the insulation resistance to the ground of the power lightning protection system is in the allowable value, whether the grounding system is reliable, whether the instantaneous clamping value changes, etc.

Information system signal lightning protection system, for whether the connected resistance belongs to the parameter allowable value, whether the instantaneous clamping value changes, the normal value of the insulation resistance to the ground, etc.

Lightning protection detection is an important content in social safety production, because now the building construction is getting higher and higher in the thunderstorm weather will have a certain risk, so it is necessary to confirm that the building lightning protection device is qualified and reliable through professional lightning detection.

Lightning protection grounding resistors are used in different places with different requirements:

1. Building lightning protection:

1. The first type of lightning protection building.

Anti-lightning induction: less than 10 ohms anti-lightning wave intrusion: less than 10 ohms anti-direct lightning: less than 10 ohms.

2. The second type of lightning protection building lightning induction.

Anti-lightning wave intrusion: less than 5 ohms (1) less than 5 ohms.

Anti-direct lightning: less than 30 ohms (2) less than 10 ohms.

3. The third type of lightning protection building.

Protection against lightning wave intrusion: less than 30 ohms.

Second, other lightning protection:

The protective grounding of electronic equipment such as instruments, PLCs, DCS, and computer systems should be connected to the grounding network of the electrical system in the factory, and the grounding resistance should be less than 4.

The working grounding (signal loop grounding, shielding grounding) of electronic equipment such as instruments, PLCs, DCS, computer systems, etc., can be carried out in the following two ways:

1) When the grounding resistance value of the grounding network of the electrical system in the plant is less than 4, and it can meet the requirements of the instrument system and the instrument manufacturer has no special requirements, it can be directly connected to the grounding network of the electrical system in the factory;

2) When the grounding resistance value of the grounding network of the electrical system in the factory area is large or the instrument manufacturer has special requirements, the instrument grounding system should be set independently, and the grounding resistance should be less than 4 (or determined according to the requirements of the instrument manufacturer).