Preventive measures for high voltage danger around electrified railways

The domestic 110KV special line is generally used to supply power to the electrified railway substation, and then converted to a 27.5KV feeder voltage, and then passed to the contact network. Generally, it is A-phase and B-phase single-phase power supply, and C-phase is connected to the steel rail. The electric locomotive takes power from the contact grid and then converts it to DC to power the locomotive. You can judge the voltage level according to the number of porcelain bottles.

● Do not damage or climb over the fence. Walking on the electrified railway. The power contact net is set above the railway line. Within two meters of each conductor and its connected parts of the contact net, there is usually a strong electromagnetic field. Changes in other external conditions will endanger the safety of pedestrians, especially pedestrians carrying objects (such as umbrellas, wooden sticks and other high-length objects) and heavy rain, when the water flows into a line, electric shock may occur. In addition, electric locomotives are fast and quiet, so pedestrians are not easy to detect, and pedestrian accidents are easy to cause.

● Electrified railway facilities shall not be damaged. Firewood and trees shall be cut on the slope of the railway, and the transportation shall not be replaced by the high-altitude fall rolling method, so as not to damage the electrified railway equipment (including contact nets, pillars, grounding wires, etc.), causing interruption and occurrence of driving Fire and other accidents. Once it is found that the contact wire breaks and falls to the ground, anyone must be more than ten meters away. For ropes and other objects hanging on the contact wire, it is strictly forbidden to remove the objects by themselves, and immediately report to the relevant railway department for disposal.

● It is strictly forbidden to receive electricity from the contact network on your own, nor can you privately pull civilian wires across the railway. The high-voltage electricity of the electrified railway is dedicated to electric locomotives. No one can privately wire as civilian electricity. Once the civilian wire is connected to high-voltage electricity (conductor) It is easy to cause fire and endanger personal safety.

● Do not play or stay on the elevated highway overpass and the platforms at both ends of the tunnel, and are not allowed to pour water and throw litter. The electric contact net is hung under the overpass and the top of the tunnel. The downward flow must be conductive, especially Children can't spray water downwards with toys, urinate downwards or use bamboo poles, ropes, etc. to approach and touch the contact wire to avoid injury from electric shock.

● No construction is allowed near the electrified railway without permission. Whether it is blasting fire, constructing water conservancy, or constructing factories and dormitories, as long as it is close to the railway, you must contact the railway power department in advance, obtain permission, and protect it as required before construction. Only after the measures can be formally started.

● Do not graze or cut trees on the hillsides and cuttings along the railway

Because livestock, trees, and grass touch the catenary, they will expand the conductive range and cause accidents. When livestock and other animals cross the railway, high-length objects such as long whips and bamboo poles held by caregivers should be passed horizontally, and waving is strictly prohibited.

● Do not put too close to the contact net to extinguish the fire. Once a fire occurs, use water or general fire extinguisher to burn the combustibles less than 4 meters away from the live part of the contact net. Do not spray in the direction of the catenary, and keep the distance between the water flow and the charged part above 2 meters.

● It is not allowed to board the top of the locomotive. In the electrified section, no one is allowed to board the top of the locomotive or cross the roof to pass the line. At the passenger platform and in the electrified section with a large number of pedestrians, all contact net pillars should be hung or painted with warning signs such as "No Climbing" and "Electrically Dangerous". It is forbidden to hang clothes on the pillar, climb the pillar or rest by the pillar.

● It is not allowed to lift tools through the contact net. When holding tools such as wooden poles and ladders to pass the contact net, they must pass horizontally. Personnel such as escort, loading and unloading with vehicles, commuting to school, etc. are prohibited from riding on the locomotive's locomotives and sitting on the roof or loaded goods in the electrified railway section. In addition to doing good publicity work, locomotive drivers, operating captains and linkers should pay attention to the loading status of the goods before the train enters the electrified section. Try to exclude branches, rods, etc. that exceed the limit, and fasten the fluttering. Tarpaulin, close the top cover of the tank truck, etc.

● Pay attention to various warnings To remind people of the high-voltage electrified body, the warning line of “high-voltage danger, climbing is strictly prohibited” should be marked on the contact network pillars along the electrified railway. No one should be allowed to contact dangerous facilities, equipment and equipment such as contact network pillars. The area, as well as the ladders or supports that can climb to the upper part of passenger cars and other places, rest and sit down, and do not damage the warning signs; the ladders of diesel locomotives used on electrified railways leading to the roof should be marked with a "high-pressure hazard" warning sign; Safety protection grids should be installed on one side (high voltage side) of electric locomotives and traction transformers.

● Observe the safety regulations of level crossings. Various vehicles and pedestrians must comply with the following regulations when passing through level crossings of electrified railways:
(1) When cars and veterinary vehicles pass through an electrified railway level crossing, the loading height of the goods (from the ground) shall not exceed 4.5 meters and the movable horizontal plate and hanging chain that touch the boundary gate of the crossing. Cargoes with a height of more than 4.5 meters should be bypassed and inverted.
(2) When vehicles with a load of more than 2 meters (from the ground) pass through an electrified railway level crossing, it is strictly forbidden to sit on the shipment with the vehicle personnel. If you need to take the unloading personnel, you should get off the car and walk, wait for the vehicle to pass the crossing, and then get on the car.
(3) When pedestrians hold tall objects such as wooden sticks, bamboo poles, colored flags and leather whips through the crossing, they are not allowed to swing high, and the above objects must be kept horizontally through the crossing to avoid the tall objects touching the charged body and causing high Piezoelectricity hurts people.
On the right pole of the crossing limit gate, the power supply section is provided with a signboard with the above-mentioned content, requiring motor vehicle drivers and pedestrians to strictly abide by it.

● It is strictly forbidden to pierce the safety grid. The grounding wire must be installed on the metal structure within 5 meters of the contact post and the live part of the contact net. Overpasses and flyovers are located close to the contact nets, and safety fences must be installed. Because flyovers, flyovers and other places that cross the contact nets are closer to the live parts, electric shocks are prone to occur. In order to ensure personal safety, safety barriers are installed Net to shield the induced current. For this reason, pedestrians are strictly prohibited from piercing the safety grid with bamboo poles, sticks, iron wires and other non-insulating objects when passing such overpasses or overpasses. Because direct or indirect contact with live parts of the catenary is very dangerous. In particular, children should be educated near the electrified railway, do not play on it, and do not stay long. Thunderstorm weather is walking in the electrified section, it is appropriate to stay away from the line.

● Climbing trucks are strictly prohibited The railway transportation department has made three orders and five applications. Climbing trucks is strictly prohibited, mainly to prevent people from crashing. When climbing a truck on an electrified railway, it is also easy to cause personal electric shock injury or death. Therefore, when it is found that someone is climbing the truck, it must be strictly stopped. Especially for freight cars from non-electrified railways, before entering the electrified railways, the personnel receiving and dispatching the trains should carefully check and find that someone is riding on the cargo loaded in the open car or the roof of the boxcar, and should be ordered to get off and advise them Take a passenger car or arrange it in a safe place to prevent the electric shock from climbing personnel after the train enters the electrified railway section.

If the train has entered the electrified railway section and is stopped under a live catenary, it should be persuaded to tell them not to stand, reminding them that there is high voltage on it, and to slowly "climb" out of the prone type. If necessary, operate the isolating switch to make the catenary power off before getting off the train. Under the condition that the contact net is live, do not rebuke and frighten loudly, so as not to fear that they will get an electric shock when they stand up and run away.

● Prevent electric shock from catenary and do first aid work. When constructing and washing vehicles near electrified railways, keep the water flow at least 2 meters away from the live part of catenary to prevent electric shock accidents. It was found that when someone got an electric shock, the person who got the electric shock quickly disconnected from the power source. The finder quickly cut off the nearest power switch, or used an insulator to separate the electric shocker from the charged body. In the process of artificial respiration for the shocked person, pay attention to the speed and the rhythm should be uniform, generally 14-16 times per minute is appropriate. When the shocked person can breathe by himself, artificial respiration should be stopped. When leakage of various types of tank trucks occurs in electrified sections, it is strictly forbidden for irrelevant personnel to go up and deal with it. When water is used to extinguish flammable objects 4 meters away from the catenary, the catenary may not be powered off, but the water pipe is not allowed to spray in the direction of the catenary, and the water flow and the live part of the catenary should be kept at a safe distance of 2 meters.