For what distance you can not approach. Safety Rules near the terminal wire of the power line

One of the most common emergency situations In electrical networks is a wire break airline Power transmission. As a rule, the power lines of those electrical networks that work in the isolated neutral mode are representing in the mode of isolated neutral, which is a single-phase closure on the ground - that is, the drop in the wire on the ground does not lead to a de-energization of the line.

Such lines after the decline of the wire can be in operation for some time until damage is detected. It is high voltage lines with voltage 6, 10, 35 square meters.

In electrical networks, a voltage of 110 kV and higher, any closure on the ground is an emergency mode and is usually disconnected by high-speed protection. That is, when the wire falls to the land in these electrical networks, the line is de-energized for a fraction of a second. But, as a rule, not every person knows how to determine the voltage class of the line and, accordingly, you need to know how to behave in case of detection of the torn wire of the LPP. Consider the safety rules that should be observed in case of near the broken wire VL.

What is dangerous to fall the wire to the ground?

To begin with, consider the question of what is dangerous to fall the wire to Earth. When the wire of the wire, which is energized, on the ground or on a conductive surface, the closure currents occurs. In the open area, currents spread within the radius of eight meters from the point of contact of the wire with the Earth. If a person falls into the radius of circuit currents to the ground, it falls under the so-called.

Step tension - It is such a tension that occurs between two surface points, in this case, the land is at a distance of a person. That is, if a person in the zone of action of closures on earth takes a step, then it falls under step tension.

In order not to get under the step voltage near the removed wire, the power lines must be followed by several rules.

The first thing to be done is to leave the danger zone, that is, it is necessary to remove from the torn wire for a distance of more than 8 m. Move in the zone of action of closures on the ground you need a "goose step", without tearing away from each other. At the same time, it is forbidden to touches any subjects and other people in the danger zone.

Sometimes there are recommendations for moving in the zone of spending currents with jumps on bubble two or one leg. By itself, such a way of moving in the zone of spreading circuit currents on the ground is safe, because at the same time the legs of a person are not open, a person concerns the ground with one point. But with this method of moving, you can stumble and become two legs at a step of a step or fall into the hands. In this case, a person falls under the step of step tension, as it comes into contact with the earth in two points removed from each other. Therefore, navigate from the zone of spreading the earth shorts to the ground is the most secure "goose step".

For workers of electrical installations, it is important to know that the spreading of the circuit currents occurs both indoors. In this case, when the wire is under voltage, the currents are spread to a distance of up to four meters from the place of contact of the wire with the surface of the floor or conductive surface.

Free movement in the zone spreading the circuit currents, both in the room and beyond, is possible only with the use of specialized electric equipment - dielectric bot or dielectric galoshes.

When the wire breaks in places where people are possible, it is necessary to de-deishes the damaged line to the area of \u200b\u200bpeople about the possible hazard of the shock.

Rules of behavior when a person affected by electric shock from the torn wire

Separately, you should consider actions in case of detection of a person who has occurred. First of all, it should be remembered that before removing the voltage from the damaged line without means of protection against a person who has occurred under the action of the voltage, it is impossible to approach. That is, it is necessary to de-energize the plot of electrical installation or an electrical network, in which a person was energized. If it is impossible to perform quickly, then it is necessary to free a person from action electric current or electric arc. The safety rules are the following.

If the accident occurred in the crew of power engineers producing repair work, as a rule, in the presence of the necessary means of protection - dielectric gloves, Dielectric bots, protective helmet and overalls. In this case, the liberation of a person who has occurred under stress is carried out using listed protective agents.

Also, the brigade of power engineers should include communication with higher personnel, on duty dispatcher electrical networks. Therefore, in the case of electric shock, the electric shock of the person as a result of approaching the transmission line of the power line must be contacted with the dispatcher on duty to take measures to remove the voltage from the damaged power line.

In the absence, the approach to the person who received a blow by electric shock is possible only by the "goose step". The main task is to free a person from the effect of electric current. In the event of a person entering the step tension, it must be pulled out beyond the danger zone of expansion of currents. If a person got tension as a result of a direct touch to the wire, then before transporting the victim the Wire to leak to the side. It is forbidden to touch the wire with the wire, it should be pre-found a dry stick.

After a person is released from an electric current, he needs to be first aid and cause ambulance To transport the victim to the hospital.

It should be noted that in addition to the torn wires, the danger also represents the excessive wires of the power lines. Wire sagging may arise due to the unreliable attachment, scorching the insulator with the traverse supports. In this case, the likelihood of the decline of the wire to the ground is high or directly on the man's power line under the line. If it is a high-voltage power line, then excessive transition of the bare wire can lead to an electric shift of a person, subject to a person near the wire at an invalid distance.

For each voltage value there is a minimum permissible distance, on which a person can be near a wire or another part of the electrical installation under the operating voltage. For example, for the wire of the 110 kV line, the safe distance is 1 m, in case of finding a person at a closer distance to the wire, it will be affected by electric shock.

Also, a large danger is wires that directly land are not concerned, but in contact with other elements - trees, cars, building structures etc. In this case, the distance to which the shorts of closures on the ground spread can be significantly more than eight meters.

On electrified railways It is prohibited to approach people to those under voltage and non-fired wires or parts of the contact network for a distance less than 2 m. It is not possible to touches the electrical equipment of the electrical composition both directly and through any objects. It is necessary to show a special vigilance when working with long metal objects (rods, wire scrap, cutter, etc.). The distance from these items to parts of the contact network, which is under voltage also should not exceed 2 m.

If, under the terms of the implementation of certain works (repair of the path, artificial structures, the elimination of a commercial marriage on an open rolling stock, inspection of roofs of buildings, etc.) It is necessary to approach the distance less than 2 m to the parts of the contact network under the voltage, then the voltage is removed from them. and set a ground for the entire period of work. In these cases, the head of the work submits an application for the removal of voltage from the contact network and the VL indicating the exact location, the beginning, duration and nature of the upcoming work.

The head of the Contact Network or Power Supply Area is prescribed an electromechanics or an electrician, which will monitor the performance of electrical safety measures associated with the contact network and VL. The surname of this electromechanics inform the energy support and the head of the work. Electromechanics or electrician of the contact network area or power supply area responsible for the removal of voltage and grounding of the contact network and VL, upon arrival in the place of work, communicates with the Energy Service and, having received an order from it, allowing the work of work, produces grounding throughout the front. After that, the electromechanics or an electrician gives the head of the work a written permission to begin their implementation, indicating the number of the order of the Energy Countercher, as well as the start time and end of work. Only after receipt written permission The head of work gives an indication of their start.

At the end of the work, the head is obliged to make sure that people are removed from the parts of the contact network and for the distance of more than 2 m. Then it marks the time of completion of work in copies of a written permission located at an electromechanics or electrician. The latter, making sure that people moved to a safe distance, removes grounding rods and gives notification about this to the energy proprietary.

On electrified areas of continuous and alternating current of work on pillars, rolling stock and other structures located at a distance from 2 to 4 m from the parts of the contact network and voltage VL, can be carried out without removing the voltage and grounding of the contact network and VL. Operations in such places should observe a special person allocated and instructed by the head of work.

Climbing the supports and special design of the contact network and BL is prohibited. These facilities, except for the employees of the contact network area, can be allowed specially trained and having a group of electrical safety workers of the alarm and communication distances. They are allowed to work only on those supports and structures on which the autoblock signals are located.

It is forbidden to tighten to the torn wires of the contact network, the VL and who are in foreign subjects, regardless of whether they relate to or do not concern the Earth or grounded structures. Railway transport workers who have discovered a cliff of the wires of the contact network or high-voltage lines crossing railwaysAnd also hanging out of them outsiders, are obliged to immediately report this on duty at the station, an energy support or a train dispatcher.

Before the arrival of the brigade of the contact network distance, the breakdown area is fencing and take measures to ensure that no one approaches the torn wires to a distance less than 10 m. If the torn wires or other elements of the contact network or high-voltage line goes beyond the envelope of the building approximation and can be lubricated when moving The composition, "this place must be protected by stopping signals according to the requirements of the signaling instructions on railways as a place of obstacles.

In the case when a person turns out to be near the torn contact wire, it is necessary to leave the danger zone with small (less than 10 cm) with steps or jumps, connecting the legs together. Such a measure of precaution protects against the defeat by step stress (4.5).

What equipment should be used when servicing electrical installations?

To protect people from exposure to electric current, arcs and electromagnetic fields when servicing electrical installations, electric power facilities are used. They are divided into basic and extra. Characteristics and procedure for testing means of protection against electric shock are given in responses to question 3.2.7 and 3-28 (4.4; 4.16).

What general requirements are presented to personnel serving electrical installation?

Maintaining existing electrical installations, operational switching, organization and performance of repair, installation or commissioning and testing can carry out specially prepared electrical personnel. It is divided into five categories:

administrative and technical, organizing and direct participation in operational switching, repair, assembly and appliances in electrical installations; These employees have the rights of operational, repair or operational and repair personnel.
operational, carrying out the operational management of the electroreman of the enterprise (workshop), as well as operational maintenance of electrical installations (inspection, work in the order of current operation, admission and supervision of working, etc.);
repair, performing all types of repair, reconstruction and installation of electrical equipment, as well as personnel of specialized services ( test laboratories, automation services and instrumentation control and measuring instruments, etc.), the duties of which include testing, measurements, adjustment and electrical equipment adjustment;
operational and repair (repair) staff of small enterprises (or shops), specially trained prepared for the fulfillment of operational work on the electrical installations enshrined after it;
electrotechnological staff of production workshops and sites that are not part of the Energy Service of the enterprise operating electrical technologies. In their rights and responsibilities, this personnel is equal to electrotechnical and subject to the technical relationship of the enterprise.

Service of electrical technological installations, primary machines and mechanisms with an electric drive, work with power tools, cleaning of rooms in which electrical installations are located, can perform non-electrotechnical personnel.

Employees serving electrical installations should undergo a medical examination when receiving work, and then periodically.

Before the appointment of independent work or when transferring to another work related to the operation of electrical installations, as well as during the break in the work as electrotechnical personnel over one year, personnel are obliged to undergo production training and knowledge check in the qualification commission; According to the results of the inspection, the employee is assigned the appropriate electrical safety group. The order of instruction, training and testing of knowledge of electrical personnel is set forth in responses to questions 5.4.2-5.4.4 (4.4; 4.15; 4.16).

What personnel should have the first electrical safety group?

Persons with the first electrical safety team, although they do not have special electrical training, should have an elementary idea of \u200b\u200bthe danger of electric current, safety measures when working on a serviced area, as well as a practical acquaintance with first aid rules.

To persons with the first electrical safety group include personnel:

electrotechnical:

newly accepted and not yet past verification of knowledge according to the rules and instructions;
specially highlighted only for cleaning electroprides;
having a previously assigned qualification group (II-V) for electrical safety, but at the moment working with an overdue certificate of knowledge verification;

neelectroechnical:

servicing electrical engineering plants (electric furnaces, electrostilifers, high-frequency installations, electrolyzers for salting melt, etc.), if it does not require assigning a higher qualification group on the assigned functions;
serving mobile machines and mechanisms with electric drive;
operating with power tools;
drivers of all cars with constantly (or temporarily) taps installed on them, mechanisms or oversized cargoes, when transporting which there may be a danger of touching air lines and communications to the wires;
working indoors and outside them, where unfavorable conditions And absence required knowledge By electrical safety, the danger of electric shock may occur.

The list of professions of this personnel is determined by the management of the enterprise in conjunction with the safety engineer, and the duties' range is governed by the local instruction (4.4, 4.15).

What is the need for work experience in electrical installations to assign II-V electrical safety groups?

The second electrical safety group can be assigned to persons having a minimum work experience in electrical installations:

electrotechnological staff - 2 months;
electrical personnel who does not have central Education and not spent special training, 2 months;
electrical personnel who has no secondary education, but past special learning, and electrotechnical personnel with secondary education, which has passed special training, 1 month.

Work experience for proftycchili practitioners, institutions and technical schools is not normalized.

The third electrical safety group is assigned to persons having a minimum work experience in electrical installations:

electrotechnological staff for 10 months in the previous group;
electrotechnical personnel who has no secondary education and not past special learning 4 months in the previous group;
electrotechnical personnel who has no secondary education, but has passed special training, - 3 months in the previous group;
electrotechnical personnel with secondary education has passed special training - 2 months in the previous group;
electrotechnical personnel with special average and higher technical education - 1 month in the previous group;
practices of institutes and technical schools - 3 months in the previous group, vocational schools - 6 months.

The fourth electrical safety group can be assigned to persons electrical personnel with minimal work experience in electrical installations:

not having secondary education and not past special learning, 12 months in the previous group;
no secondary education, but those who have passed special training, 8 months in the previous group;
with secondary education and spent special training, 3 months in the previous group;
with secondary special education and higher technical education 2 months in the previous group.

The fifth electrical safety group as the highest group is assigned to persons responsible for the electroreman, in which there are voltage settings above 1000 V, responsible work managers and other engineering personnel, depending on the duties assigned to it. At the same time, the following minimum work experience in electrical installations is established:

unnecessary education and not passed special training, 42 months in the previous group;
non-secondary education, but those who have passed special training, 24 months in the previous group;
with secondary education and spent special training, 12 months in the previous group;
with secondary special and higher technical education, 3 months in the previous group.

Requirements for the volume of knowledge of personnel having a second - the fifth of electrical safety groups are given in response to question 5.4.1 (4.4; 4.15, 4.16).

In parentheses after the question are numbers regulatory documents on labor protection used in the formation of a response -

About a third of all cases of electric traumamism among the population occurs due to contact or approaching people to their checked and torn wires.

Madly approach:

to the wire lying on the ground.
to wires, checked low above the earth.
to trees, buildings, cars that concern the torn wire.

Do not approach such objects. Do not try to raise the wire, remove it from the road.

1. Do not panic. Do not rush to escape from the lesion zone. Close, breathe deeply, look around.

2. Squeeze 8 m from the point in which the wire concerns the Earth. 8 m - radius of the lesion zone. Visually, the distance is similar to the length of the regular bus.

3. Add to the resulting distance a few more meters to take into account the errors of the eyes.

On urban legend, in soviet times Spy jumps approached secret objects protected by electric shock

Get out of the lesion zone "Goose step": Two legs together, do not break them away from each other and move from the ground, move with minor-small sliding marines. Thus, when walking, both legs will be almost at one point with one electric potential - the voltage between them will not arise. Alternative way: leave the stepping voltage zone by jumping on one leg. This method is unsafe, since the loss of equilibrium and the fall will entail an inevitable lesion to the current.

5. Immediately inform the torn wire:

112 .
8-800-333-02-52.
03 .

Notify the person responsible for the household (for example, the Chairman of the Board of Garden Association)

1. Signs of electric shock: cramps, unexpected fall Man on the street.

2. Before approaching the victim, check out 8 m. From the victim, the presence of a torn or proviscial wire concerning land, buildings, trees, fence. Electric current damage from the side can be fainted or heart attack.

3. If you have suspicion that the trauma passes can have an electric nature, do not approach the victim.There are cases when not indifferent people died when trying to approach the affected electric shock.

Provide first aid to the victim near the torn wire can only after turning off the powerhigh voltage power line.

Attempt release the victim from voltage using means of electrical protection You can only if there is 100% confidence that it is a low voltage wire (up to 1kV).

4. Immediately inform the accident on the telephone service 112, Call an ambulance by phone 03.

5. Warn passersby on danger:
- Organize protection for damage;
- Contact passersby with a warning;
- During the flooding of 2012 in Gelendzhik, five people died of electric shock. The man crossed deep puddle next to the transformer booth, he hit him and he died on the spot. Two women and man hurried to the rescue. As soon as they approached the corpse, they were also struck by a strong electrical discharge. Seeing this, another man decided to help the victims who were already dead, and also received a deadly electrician.

1. For wire Fall on Machine The driver must immediately stop the car. If you can release the car from the carved wire by moving the machine, then it must be done as quickly as possible.

2. When contribution Lifting mechanism or other parts of the machine with current-carrying wires The driver should break the contact as quickly as possible and remove the movable part of the mechanism from the current-carrying parts. Watching must report on the running line owner and cause an emergency brigade.

3. If a low voltage wire - Insulating properties of auto strokes enough for its isolation from the ground. The car will be under the line of the line, but the current does not flow over it. Immediately call the telephone service 112 . Do not leave the car and expect help.

4. If voltage wire more than 1kvIt is drunk tires - the current will flow to the ground along the car body. In this case, if there is no fire, be in the cabin safely. Immediately call the telephone service 112. Do not leave the car and expect help.

5. Electric current with a voltage of more than 1 kV flowing over the tires causes physical destruction of rubber and insulation test. Tire ignition - signal to evacuation.

6. Evacuation from motor vehicles:

If your shoes have an unstable sole (for example, heels) - remove it, evacuate your barefoot. The thickness of the sole is insufficient to protect against electric current. But the loss of equilibrium will be deadly.
Jump out at the same time on both tightly closed legs.
If you are evacuated from the bus - go out to the long-distance contact with the door.
During evacuation, do not touch the vehicle body.
Get out of the zone of the defeat "goose step": twist the legs together, do not break them away from each other and from the ground, move with minor-small sliding marins. Thus, when walking, both legs will be almost at one point with one electric potential - the voltage between them will not arise.
Try not to lose balance, do not increase the width of the step, do not touch the ground with your hand, do not rely on foreign items, do not touch other people.
Get away from contact with a wire for a distance of at least 8 m. - Visually equals the length of the regular bus.

7. Immediately report a torn wire:

According to a single telephone rescue service 112.
In PJSC "IDGC of the North-West" by phone with a free "hotline": 8-800-333-02-52.
If there are victims, call an ambulance by phone 03.

8. Warning passersbyon the danger:

Organize protection for damage;
Contact passersby with a warning;
Do not proceed to work and do not leave the place of falling the wire before the repair brigade arrival
Organize first aid victim

Examples of accidents in the territory of the Russian Federation
- In 2012, under the fall of the construction crane, the supports of the LAP were damaged, and the rolled wires wrapped the back of the passing passenger bus. Passengers remained in the cabin. After the electricity was turned off on this site, about an hour after the accident, the passengers left the bus. There are no injured.
- The busing bus hooked the proviscial wire of the LEP 35 kV and cut it off. After some time, the bus tires caught fire, the fire shrugged on the body. When entering the front door, three passengers came under electric current and died in place. The remaining passengers were evacuated through the rear doors and were not injured.
- The driver of "KAMAZ" during the sinking of the soil was moving with the raised body on the side of the road in the security zone of the power line and hooked one of the wires of the line of 10 square meters. When leaving the car, keeping the handle of the door of the car, it stepped on the ground and was amazed mortally struck by electric shock.

The most common causes of the wiring line of the power line are:

Falling a tree on the wires during a thunderstorm, hurricane, a snowy storm;
Damage to support as a result of a car accident;
Schedule wires as a result of temperature drop / under the weight of snow.

In electrical networks of low voltage when the wire breaks, electricity over it continues to do, because Changing the current force in the network is not enough to respond to protection systems. The electrical resistance of the soil is at least 60 ohms * m. If the soil resistance was lower - similarly to the metal resistance, the decline of the wire to the ground would end with a short circuit and shutdown of the LPP. But the magnitude of the resistance of the soil is insufficient to trigger protection against maximum currents. At the same time, the magnitudes of the resistance of the soil - especially wet - enough so that it spokes up as an electric current conductor.

Thus, when dropping, the electric wire is closed "to Earth" and a new chain occurs: the current continues to flow into the ground, and the sensitivity of the protection is not enough to turn it off. And if at this moment without means of electric cavity to touch the wire or tear it from the ground, the person becomes a conductor of the current between the wire and the earth - it is deadly and chance to survive in this case.

In the power grids, the voltage of 1-35kV for technological reasons for protection is configured in such a way that when a single wire cliff and the land is closed, the line is not turned off. The danger is similar to the cliff of the low voltage wire and is aggravated by the risk of falling under the step voltage.

It is impossible to determine the degree of danger of the torn wire. Unlike gas or fire leakage, electricity does not have visible signs of the presence of danger or smell that could cause anxiety. A person finds out that he fell into an electric current influence zone when it's too late to do anything. Electric current affects suddenly and instantly.

Therefore, any wire is obviously consider under stress. Even the disabled wire is better to fear, even if two dozen people tentged it to you. At the moment when you took it in hand, someone for several hundred meters from you may at any time submit tension on it.
Signs unambiguously indicating that the wire is under voltage:
- evaporation of moisture from the soil around the support, melting of snow
- the occurrence of an electric arc on the racks and in places sealing supports in the ground.
- sparking in the place of contact with the Earth.
From the torn wire on the ground, invisible concentric circles of electric voltage diverge - electricity as it were "spread" by the soil. At the point of occurrence of current to the ground, high voltage is observed (the potential is equal to the potential on the wire). As it removes from this point, the voltage decreases and on the edge of the circle it is equal to almost zero.
The radius of the lesion zone is up to 8 m.
Thus, any point in the damage zone receives a certain potential, which decreases with the removal of the wire from the ground from the point of contact. At the moment when your legs relate two points of the Earth, having different electrical potentials, a stepper voltage occurs between the legs, equal to the difference of potentials between these points, and electric current starts up from the foot to the leg.

If you get under the step tension, the muscles of the legs involuntarily decline, the victim falls to the ground. The current begins to pass between new points of support - including from the hands to the legs, which is fraught with defeat internal organs and fatal.
- Examples of accidents in the territory of the Russian Federation
  - A fifteen-year-old boy driving a horse under the wires of the 6 kV air line wires, touched the head of the wire. He died, the horse was killed.
  - Family rested on the bank of the river, putting a tent under the wires of the power line of the power line. From the wind, the tree fell on the wires, breaking around the wire, and he fell to the ground near a 15-year-old girl, which at this time sunk near the tent. The girl was mortally amazed by electric shock. Her mother, trying to assist, approached his daughter's body and died too.
  - In 2013, during a thunderstorm, the torn wire of a telephone line, entangled in the branches of trees, closed the power line with the Earth. A four-year-old boy approached the wire and was amazed, mother, trying his son, also died.
1. From step length - The wider step, the more dangerous defeat.

2. From specific resistivity - Wet ground cargo carries better than dry. From the affecting effect of low voltage currents can protect shoes with thick rubber sole.

3. From current current- With a breakfast wire of 110 kV power transmission, the difference in potentials is 5,500 volts. That is, the effect of step is equivalent to touching electrodes with a voltage between them up to 4000 volts. No pair of shoes, even the bots of the electromonter, will not be able to protect the voltage of such a magnitude.

In the event of a decrease in the resistance of insulation of wires, the conductor is obliged to cause a train electromechanics.

Check SKNB when receiving a car in flight. The position of the main batch switch in the following way.

The conductor when receiving a car in the flight is obliged to visually check the status of the SCNB sensors and wires to them, in the carriage to turn the toggle to verify the control system in good condition of the BUX heating system.

In the following path, the main batch switch must be in the "Normal Mode" position, or if low-voltage emergency highway is used in the "Feed to the Mainer" position or "Power Main" respectively.

Types of grounding of electrical equipment in the car. What equipment needs to be grounded?

Two types of grounding are used in passenger cars:

· protective grounding (cm. p.16.) In the carriage grounded on the car body by connecting with metal of the body all the cases of electricity consumers (heating boiler housing, electrical shield, lamps, water cooler and other electrical installations with voltage above 42 B..)

· The working grounding provides a conditionally reverse chain of high-voltage wagon heating (from the car body on the cart of the cart, from the cart on the housing of the box and then through the wheeler pair on the rails).

What electrical installations should be grounded, see p.15.

What household and heating electrical appliances are allowed to connect in the car?

The passenger cars are allowed to connect the vacuum cleaners adapted, desktop lamps, if they are provided with the design of the car and the electric shaver. The remaining electrical appliances connect forbidden.

When finding on electrified areas, it is necessary to observe special caution:

It is forbidden to approach the contact network for a distance less than 2 M.. climb the roof of the car;

It is forbidden to approach the torn contact wire and the foreign objects being on them, regardless of whether they concern the Earth or ground structures at a distance less 8 M.Since there is a danger of step in step voltage.

How much distance you can not approach the contact network?

It is forbidden to approach the contact network for a distance less than 2-H. meters.

How much distance you can not approach the torn contact wire that is stressful? Security measures at the exit of their dangerous zone.

It is forbidden to approach the torn contact wire for a distance less than 8. meters. To exit the danger zone, apply the security measures described in p. 10..

When the terminated contact wire is detected by the railway worker, the latter must protect the danger zone and immediately inform you or through anyone Chipboard about the discovered break.

Each person knows that if the high-voltage network is located in front of it, and the wire lies on Earth, it may be dangerous. In reality this statement It only applies to the power transmission, the voltage of which is up to 25 kV, as they are disabled only after discovery of the cliff. If the network has a voltage of 110 kV and more, after the cliff and falling the wire on the ground, its power is immediately disabled automatically.

But an ordinary person is unlikely to know about it and will not be able to recognize which network in front of it is, so in any case it is necessary to perform safety rules when the cliff is detected.

What is stepper voltage

Step-by-step voltage is the main danger for a person who has been nearby from the Power supply to the Earth. The electric current is started to spread from the land of the land with the land, gradually weak, at least 8 meters away. At the same time, there is a difference in potentials between the other points of the Earth. If a person goes and concerns the ground in two points, through his body begins to flow the electric current caused by this difference, which represents a deadly danger. Such voltage is called stepping. The wire that does not relate to the Earth, and the tree, car or the building, is no less dangerous: in this case, the stepping voltage zone can be increased.

The basic rule that allows you to avoid step-up voltage is to exclude the touch of the Earth simultaneously at two points. You can move only by the "goose step", without taking the legs one from the other and without touching any items or people in the field of defeat.

In principle, you can move around with jumps on one leg or on two legs, connected together, or run, then at every moment of time the land concerns only one leg. But this method is more risky, because there is a risk of staggering by falling into the hands, while having occurred under the influence of step tension. Therefore, the "goose step" is the most safe way Leave a danger zone.

If a person is energized, what to do?

First of all, it is necessary to take measures to turn off the torn network, told the duty dispatcher about the accident. If this is impossible, a person needs to get rid of electric current as soon as possible. You can approach it exclusively "goose step", after which it is possible to drag it beyond the effects of step stress. If the wire concerns the human body, you can only drop it into the side with a dry stick.

If we are talking about the brigade of electricians who performed repair work, they, as a rule, have dielectric shoes, allowing you to move in the area of \u200b\u200bthe Wire safely. Such brigades usually have a radio communication with a dispatcher, which can report need to disable high-voltage equipment. Capturing a person from a dangerous zone, you need to call doctors to assist him and transport him to the hospital.

Danger of wire wire

The electrical wire can be kept from the support of the LAM for various reasons to be dangerous for a person, even if it does not apply to the Earth. So, if the network has a voltage of 110 kV, the current can be affected by a person at a distance of less than one meter from the proviser wire, so it is categorically prohibited to approach it.