Electrocution under power lines on a bicycle

Shocks under a power line on a bicycle

From time to time, on the Internet, you can find messages about how some of the cyclists were hurt by an electric shock from their own bike when they passed under a high-voltage power line with a voltage of 100 kV or more. No one can give precise and intelligible answers to such requests: on the forums every now and then there are disputes on this issue, but many netizens have guesses on this score.

It is one thing when it comes to step voltage, it would be quite understandable if the wire torn off the power line would contact the ground, and then, standing on the ground, someone could, accidentally being in the wrong place at the wrong time, fall under dangerous step voltage.

This is a well-known phenomenon, for its cause in 1928 three horses died on the Leningrad pavement in one day. But the cyclist reports don’t seem to be talking about step voltage. Let’s think about this problem more thoughtfully, and try to find a clear answer.

electrocution, power, lines, bicycle

So, a bicycle on rubber tires is isolated from the surface of the earth, therefore, the current from the ground to the bicycle cannot get, and even if, by the will of an accident, the cyclist would be at the scene of the accident, where some really measurable potential would be distributed over the surface of the earth, in this case he would not have been electrocuted.

In addition, according to reports, the cyclist does not descend to the ground, and does not deliberately grab any wires, which means that the current is not directly supplied to the bicycle either from the power line or from other wires. Thus, direct electric shock from power lines is unambiguously excluded. Therefore, there is no other consideration left than to accept that stress on the bicycle is induced. It remains to understand whether it is induced from a power line by a magnetic component or an electrical component.

If we assume that the voltage is induced on the bicycle by a magnetic component, then recalling the Bio-Savart-Laplace law, we immediately find that even if at the moment when the cyclist passed under the wire, an alternating current flowed along the high-voltage line with a maximum value of, say, 2000A. then already at a distance of 5 meters from a wire 5 meters long, the magnetic induction in its amplitude would be only about 40 μT, this is only enough to slightly disorient the needle of a magnetic compass. And even about the ability to directly induce without transformation any perceptible tension on a bicycle frame 1 meter long. we don’t even have to talk about it. Electromagnetic induction option is discarded as impossible.

What remains is electrostatic induction. But for this, all the possibilities are there. If we assume that a high-voltage line with a voltage of 220,000 volts passes above the earth’s surface at a height of 8 meters, it is reliably isolated from it, then there is an alternating electric field between the wire and the ground, the strength of which is distributed approximately linearly along the height, and in amplitude can reach 27,500 volts at meter, that is, 275 volts per centimeter.

And although the bike is not in contact with the ground, this is exactly the condition when the cyclist will still be shocked by it. The bicycle here acts as the lower plate of the condenser, and the cyclist acts as the upper plate. This capacitor, with a dielectric in the form of air and a cyclist’s clothing, is introduced into an alternating electric field and is recharged all the time by this field. And if the cyclist accidentally touches the bike at the moment when this capacitor is charged, he will feel the discharge. To kill. will not kill, but unpleasant sensations will definitely be.

If a person stood under the power line with his bare feet on the ground, then he would not feel anything like that, since his whole body would acquire a zero potential of the earth. And standing on the ground under the power line on a thin rubber mat, he would have received a similar blow if he touched the ground near the mat with his finger. So it is with a bicycle, where the dielectric layer (read. a cyclist’s suit) is rather thin, therefore the electrical capacity of the resulting capacitor is not as small as it might seem at first glance.

Earlier, ElektroVesti wrote that Sistema would build a power transmission line for Kyivoblenergo for UAH 21 million to connect the 10 MW ASD Lex solar power plant.

Shocks under a power line on a bicycle

In the city of Krasnogorsk near Moscow, there is a section of a high-voltage 500-kilovolt power line, where the wires are very sagging. So much so that it is simply scary to walk under them: the distance to them from the ground is only about 5 meters. When riding a bicycle, it shocks a lot from the steering wheel, and only a madman will dare to walk in the rain with an umbrella in those places. over, the wires are located not in the wasteland, but right in the residential area. Near home and hospital.

But this article is not about sanitary standards, but about physics. The fact is that the power transmission line creates a rather strong electric field, which, in combination with low-hanging wires, can give an interesting effect.

This is a fluorescent lamp that burns without any wires or other tweaks under the power line. The lamp is the most common, exactly the same is used for lighting in offices. Is that the length is slightly more. one and a half meters instead of 75 centimeters. The lamp burns not only on the ground, but also simply in the air, as well as in the hands.

Why is the lamp lit? Due to the voltage at its ends, which in turn arises due to the electromagnetic field created by the power transmission line. The electrostatic potential on the wires is very high, and the potential on the ground, as you know, is zero. In other words, there is a potential difference, or voltage, between the wires and ground. And at the ends of the lamp there is also a potential difference, because one of the ends of a vertically standing lamp is always closer to the wires, and the second is farther from them or is on the ground.

But this potential difference is still small enough to give a current of such strength, which would be dangerous to humans. And since the current is so weak, then he should not light the lamp either. In addition, fluorescent lamps are not so simple: there are special starters inside that light it in a special way. Why does the lamp burn?

Because such lamps, in principle, burn for other reasons. Instead of an incandescent tungsten arc, there are mercury vapors inside the glass tube, which create ultraviolet radiation (converted into visible light by the white phosphor on the glass) due to voltage, but not at the ends of the lamp, but throughout its entire length, that is, both at the contacts and at mercury itself. The field under the power line creates a potential difference across the mercury vapor inside the lamp, causing it to glow. Therefore, a starter is not needed for the glow, so ordinary incandescent lamps do not glow under the power lines and therefore a person is not killed by an electric shock. It’s just that the observed effect is based on a slightly different nature.

The lamp glows very strongly when pushed into the ground, slightly weaker when held vertically in the hands and even weaker when held horizontally. The reason is the different voltage on the lamp: the end stuck into the ground provides an instant path for the current to drain, and the vertical position creates a large potential difference due to the different distances from the ends of the lamp to the wires.

In this case, you can find that it is enough to grasp the lamp by the middle with both hands, and then the glow ceases to be uniform. In the interval between the hands, it fades away altogether, and also falls off strongly in the area from the arm to the lower end, if this area is not too large. The lamp does not burn between the hands because in this place the potential difference is too small to ignite mercury vapors: the potential from the ends of the lamp passes through it and flows through the hands into the ground, and there is simply not enough voltage between them.

A lamp with a free lower end behaves similarly.

In addition, the glow of the lamp drops sharply when brought to massive iron structures or wide bushes. Probably, these objects also contribute to the draining of the potential into the ground, “pulling” the field next to them.

I also propose to take a look at the video lecture, where a similar experiment is carried out with the Van de Graaff generator.

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Is the refrigerator electric shock? We know what to do!

NOT WITH US: FROM 1000 R. WE HAVE: FROM 500 R. IF ORDER REPAIR, DIAGNOSTICS FOR FREE

Ask a question or call the master for free and the area He will arrive the same day.

Why don’t birds get electrocuted on power lines?

Is the fact that the refrigerator is electrifying a reason for panic? What to do to prevent an annoying nuisance from escalating into danger?

In both old and new refrigerators, sometimes there is such a phenomenon as insulation failure. If suddenly you felt on yourself how it breaks with an electric current at the usual touch, this is a sign. it’s time to call the master.

What repairs will be needed if the refrigerator passes current?

First of all, you need to identify the cause of the problem and find out exactly where the refrigerator wiring is passing current. To determine, you need a special device. a megohmmeter. With its help, you determine the level of electricity in a particular wire, determine the place of current leakage and quickly find damage.

If this device is still found in your home, you need to disconnect the unit from the network, connect the megohmmeter one by one to each “finger” of the cord plug from the “line” clamp. If there is insufficient insulation resistance, the device will indicate this.

Next, in a similar way, check all the wires and contacts of the unit.

Important: under no circumstances connect the refrigerator to the network at the time of testing! You risk getting a severe electric shock

Hurry up to solve this problem. call 8 (495) 109-02-72 or leave a request on the website.

What to do before the master arrives if the refrigerator is shocked?

First of all, it is worth disconnecting the unit from the network, checking the wire and plug for external damage. Then you should immediately call the master mechanic from the repair service for a detailed inspection and determine the reasons.

In no case leave the refrigerator in working order, if you notice a current emanating from it, this can be dangerous for your household!

Electrocution/Work Safely with Ladders Near Power Lines

Why does zero shock when the phase is off?

Scheme No. 1

Everything is very simple here. A chandelier (Lamp) hangs above. The level of the ceiling is visible, from which 2 wires come out. Then these 2 wires go to the switch. On the other hand, to the switch from the floor, other wires go through the wall, carrying the “Earth” and “Phase”.

In order for the lamp to light up, you need to apply “Earth” to one of its ends, and “Phase” to the other end. This is the general principle of turning on any electrical device.

However, there is a very important point! Regardless of whether the switch is on or off, there is always voltage on the “Phase”. Therefore, such a wire “L”, if it is exposed, is always hidden in sockets or junction boxes. If you look at the picture, you will see that “Phase” has come to the switch and now “lives” there. But the light will light up only when the circuit is closed. And here is the case shown in this picture is really safe. If we turn off the switch, then the lamp can simply be changed with bare hands, since empty wires that carry nothing are connected to it.

There is no or poor contact on ground, grounding in the shield

Often, even in newly built houses with 3-core cable lines, there is a situation when a small voltage is present on the grounding conductor, and therefore on everything to which it is connected, within a few tens of volts.

It seems that the wiring in the apartment is new, and everything is assembled in junction boxes according to diagrams observing the “polarity”, but it shocks everything you can’t touch.

The explanation can be very simple. In the apartment panel, all grounding wires are collected in a heap and connected to one common bus.

But it is neither grounded nor grounded! Electricians simply forgot to do this. Hence all the problems.

Or there is somewhere a break in the main grounding wire from the circuit to your shield. Check the voltage in the panel between the ground bus and the phase. It should be stable around 220V. If the voltage “floats” in absolutely arbitrary parameters, then obviously there is a break somewhere.

Answers @: Why does the phase shock, but not zero? Why does the neon on the phase indicator light up?

Well, in some ways you were right, I jumped like a fool for five minutes in front of the outlet, the indicator really lights up when my feet do not touch the floor.It is necessary to try to connect a large sheet of iron to the indicator, it may also burn.

There is no difference between phase and zero, when both are connected to a load that consumes current. Differences will be when there is no payload, but there is an accidental touch of the wires.

At the same time, if you touch the neutral wire and, for example, the water pipe, then nothing unpleasant will happen. And if you touch the phase wire and the same pipe, the consequences will be VERY sad.

Unfortunately, due to the imperfection of the grounding lines between the neutral wire and the pipe, there is still a potential difference, and this is bad.

In the household network, a solidly grounded net is used, i.e.

netral (the point of connection of the step-down transformer windings, the potential of which is known to be zero, according to Kerhoff’s law) directly connected to the ground loop.

When you touch the phase wire, the current passes through you to the ground, and when you touch zero, respectively, no. Added after completing the question: Open your site “The idle thoughts of an idle person. “

phase. this electricity comes when the circuit is open, then at zero non-electricity when you close the circuit, the electric / energy goes through the source to zero and that’s all, by the way, not neon and the diode does not show neon on the indicator

I’ll make you zero tra. no. the current passing through the consumer flows through zero, it can be mono to feel when touched, a slight tingling sensation, or maybe it does not seem like a little, but about the body of a person acting like a container, you throw it, the body of a person is active resistance.

and about the simplest electrical circuits, take the indicator and jump will not reach through the head will reach through the legs. Udachi

What did you say there that the constant does not hit? Take the pipe in your hands, stand on the tram rail and beat the contact wire with the pipe. You will see…. If you are afraid you can wear slippers))

The phase is a conductor through which current flows, and zero is also a conductor, but its task is to fix the circuit, well, for example, a battery has a plus and a minus plus is needed in order to connect the circuits so that without a minus it will not hit

Power engineers warn that the current from the power line can kill at a distance of several meters

RIAMO. 8 Aug. Moscow Region power engineers warn selfie lovers that an attempt to take an extreme photo against the background of energy facilities is deadly. you can suffer from both a fall from a height and an electric shock, which breaks through even at a distance of several meters from the power line, the press service of the Moscow Energy Ministry said. areas.

On the evening of August 4, in Chekhov, near the village of Dubna, at an altitude of 18 meters, a 16-year-old teenager died from an electric current of 35 thousand volts on a power line support. He ignored the warning signs that were installed on the power transmission line pylons and climbed onto the pylon. So, the desire to take a photo at a height cost the young man his life.

“You need to remember and tell your children that high-voltage voltage breaks through the air and is capable of striking a few meters away, even if you do not directly touch the live parts,” warned the Minister of Energy of the Moscow Region Leonid Neganov.

In order not to put your own life and the lives of loved ones at risk, it is necessary to pay attention to the signs warning of mortal danger at power facilities: “Stop! Tension! “,” Don’t get in! Kill! ”,“ Caution! Electric voltage! “. These are not simple words, this is a warning of a real threat.

You should not approach sagging and broken wires of overhead power lines, as well as approach a broken wire lying on the ground at a distance of less than eight meters. You must not commit any illegal actions that can disrupt the normal operation of electrical networks, as this can be traumatic.

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Selfies should not be taken on energy objects, including using a phone tripod. It is important to know that you can get under voltage without touching live parts, but only by approaching them at an unacceptable distance. In the air gap between the electrical installation and the human body, an electric arc will occur, which will cause injuries incompatible with life.

It is forbidden to water green spaces from hoses near overhead and cable power lines, plant and cut trees, fold things, arrange sports and playgrounds, fly kites. Also, you can not throw foreign objects on the wires and attach foreign objects to the power transmission line supports, climb the supports, fish, make fires and set up tents near power facilities.

All violations in the power grid complex can be reported by calling the single information contact center: 8 (800) 700-40-70.

The problem of “bird” blackouts

While most people believe that birds are not susceptible to electric shocks on overhead lines, statistics show other results.

In particular, most US power companies (about 87% to be precise) associate many of the power outages with birds.

Note that similar problems to one degree or another are typical for Russia, and in certain regions “bird” outages require radical measures.

Studies carried out in the Moscow region have shown that, on average, for every 10.0 km of power lines, there are about 150 charred remains of birds. That is, they are killed by electric current, so the stories about the invulnerability of birds are somewhat exaggerated.

It should be noted that it is not the birds themselves that bring the greatest harm to the electrical system, but their excrement. Getting on insulators and other electrical equipment, they can cause a short circuit. over, small birds can also excel if they gather in sufficient numbers.

Collective sidki are also dangerous in that the weight of the flock can greatly delay the power lines of the power lines. When the birds leave the overhead line at the same time, its wires can overlap when straightened, which will provoke a short circuit. This can be avoided by strengthening the overhead line by installing a double wire.

exotic causes of bird outages are not so common, such as woodpeckers destroying wooden poles or birds eating the ribs of polymer-based insulators.

Attempts to nest on poles are no less problematic. When building nests, birds come across not only branches, but also pieces of wire that brought into the nest can shunt insulators or cause an interphase short circuit.

Support socket

Even if there are no wires or other conductive elements in the nests, such a structure, getting wet in the rain, can create a risk of short circuit.

Fighting bird blackouts

The PUE has a clause dedicated to this problem (clause 5.7.10).

It says that in places of a large concentration of birds, which form intensive pollution with isolator droppings, as well as in nesting areas, it is necessary to install special deterrent devices that do not cause damage to birds. Since there is no more detailed information in the Regulations on deterrent devices, let us turn to the experience of other countries.

In particular, in the USA, in order to prevent large birds from touching the phase wires, the dimensions of the upper supports of the supports are increased. Their height is increased in comparison with standard models by 40.0 cm, and their length from the side of the traverse by 30.0 cm.

As for the problem of mass nesting on electrical supports, the only effective solution is to install a special platform, where there is a “blank” of the nest. Dropping nests (during the period of their abandonment) does not give results, the next year the nests will be restored. Attempts to deprive the birds of material for construction also turned out to be useless.

At one time, special steel “hedgehogs” were installed in the landing and nesting sites. The method turned out to be effective, but was prohibited by environmentalists due to the high probability of injury to the bird when attempting to land.

Replacing steel rods with plastic ones gave the opposite effect, the birds began to bite the rods and use them as materials for nests.

As a result, the power companies had to return to the installation of special sites for nests.

Note that nesting can be fought by an installation that randomly generates flashes of light during the night.

To protect against bird droppings, the installation of a special “umbrella” over a garland of insulators helps. Now many manufacturers produce various models of polymer insulators, in which the top rib is significantly larger than that of other insulators.

Polymer insulators: 1). ordinary; 2) with a protective umbrella

The diameter of such an upper rib is about 45.0-50.0 cm, which is excellent protection from both raindrops and droppings.
Note that attempts to scare away birds with the help of special devices and models imitating predatory species did not have the desired effect for a long time. After a few weeks, the birds got used to repellents and stopped noticing them.

Theory

First of all, we will make a short excursion into the school physics course in order to remember what electric current, voltage and resistance are.

Electric current (the accepted designation is I) is nothing more than the movement of charged particles (electrons, ions, etc.).

An important condition for their directional movement of charges is the potential difference (voltage, the accepted designation U) between two points of the electrical circuit.

Now consider such a physical quantity as resistance (the accepted designation R). It means preventing a conductor from flowing through it electric current. The inverse of resistance is conductance.

It depends on criteria such as length, conductor, its cross-section, as well as the resistivity of the material.

You can calculate the resistance of a conductor using the formula: R = (l p) / S, l. length, S. cross-section, p. resistivity (tabular value).

These theoretical calculations will be enough to understand why birds are not electrocuted on power lines. If you have any questions about the theoretical part, you can get more detailed information from other publications on our website. We will proceed directly to the consideration of the phenomenon.

Why does it shock under power lines?

Watching birds sitting on power lines, each of us at least once wondered why the current does not work on feathered flyers.

At the same time, more attentive observers note that power lines with a voltage class of 220 kV or more are not used by birds as a roost.

To explain the reasons for this, we recall the school course in physics, and for one and the basics of electrical safety. This will help you understand why birds are not electrocuted on wires.

Why birds do not sit on power lines with voltages above 200 kV?

Birds are sensitive to magnetic fields. A strong magnetic field is created on high-voltage lines with a voltage of over 200 kV. Also, as a result of air ionization under the influence of an electromagnetic field, so-called corona discharges are created along the power line. Birds feel it and certainly do not fly there. This unique ability in birds allows them to “intelligently” choose their roost.

What Happens to the Bird on the Wire?

First, we note that an animal (including a bird) can die from an alternating current of less than 0.1 A at a voltage of 40 V. Therefore, at first glance, it may seem that 220 V is enough for the death of a bird. However, not all so simple.

Current is the directed movement of charged particles between two points with different potentials. And the voltage is the potential difference, for example, between the phase wire and zero. That is, for the death of the feathered, it is necessary that the particles begin to move and a current passes through her body, and for this she needs to become a conductor between two points with different potentials.

When the bird sits on the phase wire, it takes on the potential of the wire. In fact, it is a small branch of the wire connected in parallel. Note that, contrary to the opinion of many, a small potential is still created between the legs of the feathered.

However, the wires of power lines have very low resistance per unit length, and the bird has much higher resistance at small linear dimensions, so the potential difference is practically not perceptible to birds.

We can say that the potential difference is as small as if the bird is sitting at one point on the wire. Therefore, it does not actually shock her.

Why don’t birds get electrocuted when they’re sitting on wires

Watching birds sitting on power lines, each of us at least once wondered why the current does not work on feathered flyers. At the same time, more attentive observers note that power lines with a voltage class of 220 kV or more are not used by birds as a roost. To explain the reasons for this, we recall the school course in physics, and for one and the basics of electrical safety. This will help you understand why birds are not electrocuted on wires.

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Conditions under which the bird will be electrocuted and killed

As already mentioned in the theoretical part, a potential difference is required for the formation of an electric current. Therefore, in order for the feathered one to “jerk” by the current, he must touch the neighboring wire (for example, with his wings or beak, since this will be problematic with bird’s feet), which will lead to an interphase short circuit or short circuit to the lightning protection line or zero.

Naturally, such a “trick” is available only for large birds, whose wingspan will be enough to touch the adjacent cable. A sparrow is unlikely to succeed, but if a crow sits on the wire, it may well reach another phase. As a result, a current will flow through her body, which will lead to the death of the bird.

Naturally, if insulated wires are used in the overhead line, then there is no voltage difference, and, therefore, the discharge current does not pass through the body of the bird. This is due to the high insulation resistance, which is a dielectric that does not allow both direct current and alternating voltage to pass through.

Theory

First of all, we will make a short excursion into the school physics course in order to remember what electric current, voltage and resistance are. Electric current (the accepted designation is I) is nothing more than the movement of charged particles (electrons, ions, etc.). An important condition for their directional movement of charges is the potential difference (voltage, the accepted designation U) between two points of the electrical circuit.

Now consider such a physical quantity as resistance (the accepted designation R). It means preventing a conductor from flowing through it electric current. The inverse of resistance is conductance. It depends on criteria such as length, conductor, its cross-section, as well as the resistivity of the material. You can calculate the resistance of a conductor using the formula: R = (l p) / S, l. length, S. cross-section, p. resistivity (tabular value).

These theoretical calculations will be enough to understand why birds are not electrocuted on power lines. If you have any questions about the theoretical part, you can get more detailed information from other publications on our website. We will proceed directly to the consideration of the phenomenon.

Fighting bird blackouts

The PUE has a clause dedicated to this problem (clause 5.7.10). It says that in places of a large concentration of birds, which form intensive pollution with isolator droppings, as well as in nesting areas, it is necessary to install special deterrent devices that do not cause damage to birds. Since there is no more detailed information in the Regulations on deterrent devices, let us turn to the experience of other countries.

In particular, in the USA, in order to prevent large birds from touching the phase wires, the dimensions of the upper supports of the supports are increased. Their height is increased in comparison with standard models by 40.0 cm, and their length from the side of the traverse by 30.0 cm.

As for the problem of mass nesting on electrical supports, the only effective solution is to install a special platform, where there is a “blank” of the nest. Dropping nests (during the period of their abandonment) does not give results, the next year the nests will be restored. Attempts to deprive the birds of material for construction also turned out to be useless.

At one time, special steel “hedgehogs” were installed in the landing and nesting sites. The method turned out to be effective, but was prohibited by environmentalists due to the high probability of injury to the bird when attempting to land. Replacing steel rods with plastic ones gave the opposite effect, birds began to bite the rods and use them as materials for nests. As a result, the power companies had to return to the installation of special sites for nests.

Note that nesting can be fought by an installation that randomly generates flashes of light during the night.

To protect against bird droppings, the installation of a special “umbrella” over a garland of insulators helps. Now many manufacturers produce various models of polymer insulators, in which the top rib is significantly larger than that of other insulators.

Polymer insulators: 1). ordinary; 2) with a protective umbrella

The diameter of such an upper rib is about 45.0-50.0 cm, which is excellent protection from both raindrops and droppings.
Note that attempts to scare away birds with the help of special devices and models imitating predatory species did not have the desired effect for a long time. After a few weeks, the birds got used to repellents and stopped noticing them.

What happens to the birds on the wires?

To solve the problem, it is necessary to consider the introductory conditions. In this case, they are as follows:

  • Power transmission line through which high voltage electricity flows.
  • Dielectric in the form of air surrounding high-voltage wires and cables.
  • Birds sitting quietly on wires and apparently not feeling any discomfort.

Birds that have taken a liking to wires

To explain this, it is enough to remember that the electric current travels along the path of least resistance. A bird sitting on a wire can be thought of as a resistor shunted by a wire. As a result, the internal resistance of the bird’s body will be higher than that of the guide, on which it rests with both paws. In addition, on the paws of the flyers there is a layer of keratinized scales that play the role of insulators at the points of contact with the wires.

Resistance is futile

As a result, we have a resistor whose resistance is significantly higher than that of the shunt conductor. This does not allow electric current to pass through the bird’s body, but at the same time a potential is formed on it equal to the voltage in the power line.

Please note that birds fly around the side of power lines with a voltage class of 220.0 kV or more, and in wet weather and 110.0 kV lines. This is due to the formation of high-intensity electromagnetic fields and corona discharges on the wires of overhead lines. Some birds of prey are an exception; they can also be observed on 330.0 kV lines. According to ornithologists, this is due to the presence of a certain resistance to the effects of intense electromagnetic fields.

Formation of corona discharges on high-voltage transmission lines.

The problem of “bird” blackouts

While most people believe that birds are not susceptible to electric shocks on overhead lines, statistics show different results. In particular, most US power companies (about 87% to be precise) associate many of the power outages with birds. Note that similar problems to one degree or another are typical for Russia, and in certain regions “bird” outages require radical measures.

Studies carried out in the Moscow region have shown that, on average, for every 10.0 km of power lines, there are about 150 charred remains of birds. That is, they are killed by electric current, so the stories about the invulnerability of birds are somewhat exaggerated.

It should be noted that it is not the birds themselves that bring the greatest harm to the electrical system, but their excrement. Getting on insulators and other electrical equipment, they can cause a short circuit. over, small birds can also excel if they gather in sufficient numbers.

exotic causes of bird outages are not so common, such as woodpeckers destroying wooden poles or birds eating the ribs of polymer-based insulators.

Attempts to nest on poles are no less problematic. When building nests, birds come across not only branches, but also pieces of wire that brought into the nest can shunt insulators or cause an interphase short circuit.

Support socket

Even if there are no wires or other conductive elements in the nests, such a structure, getting wet in the rain, can create a risk of short circuit.