The high-voltage electricity is so fierce, why can the line inspector walk on it?

Because the transmission line is electrified by the metal wire, the conductor will generate electrostatic induction, and because the conductor is grounded, the conductor forms a sparse shielding net (electrostatic balance inside the conductor) to shield the external electric field, thus protecting the human body's 3376.94 km long high-voltage line.

Because it is in close contact with 10,000 volts of high-voltage electricity, it is intact, so it depends on a special suit. It's called shielding suit. It's made of metal wire, including gloves and labor shoes. It's special and resistant to high pressure. It can protect human body from high voltage electric field. "When the distance is less than 1.8 meters, there will be a phenomenon of discharge in the air, and the super current will blow people away. Without protective equipment, it is suicidal. Although wearing a shielding suit can ensure that you will not be shocked, the whole person is still surrounded by a high-voltage electric field, and the hair and hair of the whole body will stand upright, so the technicians in the maintenance class can only cut the hair short and then cut it short.

Line patrol operators are professionally trained and qualified personnel, and wear shielding clothing when working. The function of shielding clothing is to form an equipotential shielding surface on the surface of human body in high-voltage electric field, thus protecting human body from the harm of high-voltage electric field and electromagnetic wave. In addition to wearing shielding clothing, operators should also have high psychological quality and excellent technology, and operate in accordance with safety regulations and operating standards. According to the records, there are already robots patrolling the line, which may completely replace manual operation in the future.

Low voltage electricity will cause electric shock casualties. How can high-voltage electricity be okay? The reason is that the operator is at the same potential as the high-voltage line, so there will be no current passing through the human body and no injury. In order to ensure that people and wires are at the same potential, the staff are specially equipped with insulating platforms, insulating clothes and insulating gloves with excellent insulation performance. As long as people don't touch two objects with different potentials at the same time, there will be no electric shock accident.

According to the position of human body, live work can be divided into equipotential work, low potential work and medium potential work. During equipotential operation, human body is in direct contact with high-voltage live parts. In the high-voltage electric field, there will be dangerous current flowing through the human body, endangering personal safety. Therefore, all workers entering the high-voltage electric field should wear a full set of shielding clothing.

The shielding suit for live working, also called equipotential equalization suit, is made of uniform conductor material and fiber material. Its function is to form an equipotential shielding surface in the high-voltage electric field on the outer surface of the human body after wearing, so as to protect the human body from the harm of high-voltage electric field and electromagnetic waves. A complete set of shielding clothing should include coat, trousers, hat, socks, gloves, shoes and their corresponding connecting wires and connectors.

When the electric power department recruits patrol hours every year, it must first undergo strict professional pre-job training and examination. Because high-voltage lines cross rivers, some cross mountains and mountains, up to 800 meters from the ground, there are either deep mountain canyons or turbulent rivers below, so the psychological quality and physical quality should be absolutely excellent. Secondly, there are some obstacles to ensure the electricity consumption of enterprise residents. At present, the circuit maintenance robot can not handle it accurately, and only needs manual service. Finally, there should be five high-voltage transmission lines, namely, phase A, phase B, phase C, N (neutral line) and PE (ground line), although high-voltage patrol.

It's really terrible that people see UHV maintenance personnel walking on the wires! People's scalp is numb, so high voltage really won't shock people?

This kind of situation that people have seen has appeared in many documentaries and photos. There are generally three situations when taking the UHV line. Let's give you a detailed introduction.

Before the introduction, I will give you a general knowledge of UHV line.

This kind of conductor that can walk on it is called "split conductor", that is to say, one conductor for each phase cannot transmit such a strong current, and more than two conductors are needed to increase the cross-sectional area of each phase conductor. Generally, there are two branch lines arranged up and down, which are called "two branch lines"; We call it a "four-split conductor" composed of four wires; Six lines are called "six branch lines".

1, walk on the conductor during construction.

As mentioned above, the split conductor consists of a plurality of conductors. Therefore, except for two split wires which are not fixed with hardware, other split wires will be clamped with hardware at regular intervals.

These jobs were all installed by workers after the wires were erected. At this time, we will see the workers walking on the wires. Because this is in the process of construction, the conductor is not charged.

2. Walk on the conductor during power outage maintenance.

In the operation of UHV lines, there will also be problems due to various reasons, such as strong tension disconnection; Kites are wrapped around wires; Or there is something wrong with the hardware that fixes the wire in the middle, and so on. These all need workers to deal with.

When the power is cut off and the line is overhauled, people will be sent along the conductor to deal with the problems found. At this time, we will also see workers walking on the conductor, but at this time, the line is also dead.

3. Equipotential operation

EHV lines often involve the power supply task of a regional main network, and generally do not easily lose power. When the line fails, it must be overhauled. If it is not repaired in time, it will affect the safe operation of the line, and the line really can't be cut off. At this time, it is necessary to carry out live work.

Live working, one project is equipotential working.

What is equipotential?

For a common example, when we are at home, standing on a dry wooden board or rubber mat and holding the 220-volt wire at home with one hand, we won't feel electricity. Although we have 220 volts all over our body at this time, because we are standing on insulation, the 220 volts on our bodies are not in contact with other objects and cannot form a loop. At this time, 220 volts can't hurt us.

In fact, this is a simple "equipotential" state.

The principle of the above example is also applied to the equipotential operation of UHV lines. Workers should wear "equipotential suit" before operation. Equipotential clothing, that is, protective devices such as clothes, trousers, hats and gloves, are all made of metal wires. After wearing them, it is equivalent to covering people in metal cages.

When a worker wearing a superior potential suit touches a UHV line, every part of the worker's body is completely consistent with the line voltage.

Because the safety distance of UHV lines is large, for example, the safety distance of 220 kV lines is generally not less than 6 meters, and the safety distance of 500 kV lines is greater than 8 or 9 meters. Workers working on conductors should keep enough distance from other conductors or metal parts, and strict monitoring system can ensure the safety of equipotential workers.

Of course, what I said is only a brief introduction to the basic principle of equipotential operation, and the actual situation is far more complicated than that described above. Moreover, a powerful security system is needed to complete the ultra-high voltage equipotential operation.

In addition, to correct it again, the line inspector will not do this work. Line patrol is a regular offline patrol to find problems in time. After the problem is found, there will be professionals to carry out maintenance, which has nothing to do with the line inspector.

I'm glad to answer your question: it's because it's in close contact with 10 kV high voltage, and it's intact, thanks to a special suit. It's called shielding suit. It's made of metal wire, including gloves and labor protection shoes. It's special and resistant to high pressure. It can protect human body from high voltage electric field. "When the distance is less than 1.8 meters, there will be a phenomenon of discharge in the air, and the super current will blow people away. Without protective equipment, it is suicidal. Although wearing a shielding suit can ensure that you will not be shocked, the whole person is still surrounded by a high-voltage electric field, and the hair and hair of the whole body will stand upright, so the technicians in the maintenance class can only cut the hair short and then cut it short. r

Live maintenance is not only dangerous, but also has a high difficulty coefficient. There was no protection during climbing the tower. If you fall down carelessly, you will die. Maintenance can't be chaotic. If the operation is wrong, it will cause a major accident. Workers who work with electricity must be in good health before they can climb the tower.

I hope my answer can help you.

Absolutely! There are two situations: one is that in the case of power line power failure, electric workers can carry out maintenance and installation on high-voltage lines after doing a good job of safety protection. Another situation is that you can work on the power line without power failure (also called live working). The secret is as follows: high-voltage electricians must wear special insulating clothes when working at high altitude. According to the position of human body, there will be dangerous current flowing through human body in high voltage electric field, which will endanger personal safety. Therefore, all workers entering the high-voltage electric field should wear a full set of shielding clothing. The shielding suit for live working, also called equipotential equalization suit, is made of uniform conductor material and fiber material. Its function is to form an equipotential shielding surface in the high-voltage electric field on the outer surface of the human body after wearing, so as to protect the human body from the harm of high-voltage electric field and electromagnetic waves. That's the truth.

Working on high-voltage lines is called "high-voltage live working". Live working is to reduce the loss caused by power failure and is suitable for EHV lines.

Low voltage electricity will cause electric shock casualties. How can high-voltage electricity be okay? The reason is that the operator is at the same potential as the high-voltage line, so there will be no current passing through the human body and no injury. In order to ensure that people and wires are at the same potential, the staff are specially equipped with insulating platforms, insulating clothes and insulating gloves with excellent insulation performance. As long as people don't touch two objects with different potentials at the same time, there will be no electric shock accident.

High-voltage line inspectors are comparable to Adili, and their task is to clear tree barriers for line passages. After the inspector boarded the high-voltage line, the nearest distance between the cable under his feet and the ground was12m, and the highest was 800m. In order to patrol, they conducted a segmented high-altitude patrol. Record all potential safety hazards along the high-voltage lines. When the electric power department recruits patrol hours every year, it must first undergo strict professional pre-job training and examination. Because high-voltage lines cross rivers, some cross mountains and mountains, up to 800 meters from the ground, there are either deep mountain canyons or turbulent rivers below, so the psychological quality and physical quality should be absolutely excellent. Secondly, there are some obstacles to ensure the electricity consumption of enterprise residents. At present, the circuit maintenance robot can not handle it accurately, and only needs manual service. Finally, there should be five high-voltage transmission lines, namely, phase A, phase B, phase C, N (neutral line) and PE (ground line), although high-voltage patrol.

Electric shock is caused by electric current flowing through the body, doing work on people, burning human tissues, and then flowing through the heart, so that the heart can not work normally, thus causing harm to people.

The formation of current needs two key factors: voltage and loop. A voltage acts on the human body, and then the human body contacts other conductors to form a loop, which will generate current. Generally, the maximum safety of human body can bear 30mA current. For example, in daily life, when we stand on the ground wearing shoes with poor insulation and touch live wires, the voltage acts on the human body from the contact point to the ground (the zero line of the transformer is connected to the ground at the transformer), and then a loop is formed at the transformer to generate current, thus completing the electric shock process.

High-voltage electricians must wear special shielding clothing when working on line. The shielding suit is closely connected with the human body, making it equipotential with the conductor. Without potential difference, voltage cannot be formed, and there is no loop circulation. Therefore, if the conditions for forming current are gone, people will not be charged.

Hello, I'm glad to answer your question. First of all, electric workers are aerial workers and high-risk occupations. They are professionally trained and need to wear professional equipment to work, such as insulating clothes. When they work, they are separated from the ground and will not form current, because people and wires belong to the same potential. Because people can transmit electricity, so will the earth. If people contact electricity to form a loop, they will get an electric shock. If people wear insulating clothes or leave the ground and can't form a loop, they won't be shocked.

The most effective treatment for ordinary people after electric shock is:

Method 1. Find the power supply and turn it off quickly.

Method two. Wood is insulated. You can open the wire with wood. Method three. If you want to repair the circuit, make all preparations and wear insulation equipment. If you are at home, you should cut off the power.

I hope these answers are helpful to you.

Line patrol operators are professionally trained and qualified personnel, and wear shielding clothing when working. The function of shielding clothing is to form an equipotential shielding surface on the surface of human body in high-voltage electric field, thus protecting human body from the harm of high-voltage electric field and electromagnetic wave. In addition to wearing shielding clothing, operators should also have high psychological quality and excellent technology, and operate in accordance with safety regulations and operating standards. According to the records, there are already robots patrolling the line, which may completely replace manual operation in the future.

The landlord will be happy to answer your questions. The following is my answer. I hope I can help you!