10kv overhead line, it is strictly forbidden to cross the fire and exposure danger environment Right

Yes, there are clear regulations to regulate overhead lines of 10kV and below.

It is strictly forbidden to cross the ** gas environment, and the horizontal distance between the overhead line and the ** gas environment should not be less than the times of the height of the tower. In special cases, after taking effective measures, the distance can be appropriately reduced.

1kV 10kV distribution lines should not cross buildings with roofs made of flammable materials;

Overhead lines of 10kV and below are strictly forbidden to cross the ** gas environment.

**Gas hazardous environments are divided into several zones.

Zone 0: Environments where there is a continuous or long-term presence of ** gas mixtures;

Zone 1: Environments where gas mixtures may occur during normal operation;

Zone 2: Environments where a mixture of gases is unlikely to occur during normal operation, or where it is only present for a short period of time;

Additional Zone 2: When flammable substances are likely to be released in large quantities and spread beyond 15m, the scope of the hazardous area shall be divided into additional Zone 2.

There is flammable gas.

Are the environments dangerous?

Not necessarily, to be at the limit.

Yes. Combustible substances (combustible gas, vapor and dust) and air (or oxygen) must be evenly mixed within a certain concentration range to form a premixed gas, which will only occur when it encounters an ignition source, and this concentration range is called **limit, or **concentration limit.

For example, carbon monoxide.

The ** limit of mixing with air is. The minimum and maximum concentrations at which a flammable mixture can occur are called the lower limits, respectively.

and ** upper limit, which are sometimes referred to as the lower and upper limits of ignition.

Do not ** and do not catch fire when below the ** lower limit; Doesn't do above the upper limit, but burns. This is due to the insufficient concentration of combustibles in the former, and the cooling effect of excess air prevents the spread of flames; The latter is due to the lack of air, which prevents the flame from spreading. When the concentration of combustibles is approximately equivalent to the reaction equivalent concentration, it has the greatest ** power (i.e., according to the complete combustion reaction equation.

calculated concentration ratio). Controlling gas concentrations is an indispensable part of occupational safety. Add inert gas.

or other non-flammable gases to reduce the concentration. Before discharging the gas, the explosive gas can be removed by scrubbing and adsorption.

1kV 10kV distribution lines should not cross buildings with roofs made of flammable materials;

Overhead lines of 10kV and below are strictly forbidden to cross the ** gas environment.

No, it is not strictly cross-domain if it is above 10kv, and cross-domain is strictly prohibited if it is below 10kv.

The first mold collapsed answer] :d

Overhead power lines are strictly forbidden to cross the first-class gas environment, and the horizontal distance between the overhead line and the first-class gas environment should not be less than the height of the tower. In the case of special yards, after taking effective measures, the distance can be appropriately reduced.

Answer]: c This question examines electrical fire and explosion prevention technology. Overhead power lines are strictly forbidden to cross the high-quality gas environment, and the horizontal distance between the overhead line and the high-quality gas environment should not be less than the virtual height of the poor branch nano tower.

1kV 10kV distribution lines should not cross buildings with roofs made of flammable materials;

Overhead lines of 10kV and below are strictly forbidden to cross the ** gas environment.

Overhead lines mainly refer to overhead open wires, which are erected on the ground, and are transmission lines that use insulators to fix transmission wires on towers standing upright on the ground to transmit electric energy. Erection and maintenance are more convenient, the cost is low, but it is easy to be affected by the weather and environment (such as strong winds, lightning strikes, pollution, ice and snow, etc.) and lead to the failure of the bridge to change the ridge, and at the same time, the entire transmission sensitive seepage corridor occupies more land area, which is easy to cause electromagnetic interference to the surrounding environment.

The main components of overhead lines are: conductors and lightning cables (overhead ground wires), towers, insulators, fittings, tower foundations, cable and grounding devices, etc.

It should be avoided as much as possible, and the world is strictly forbidden to laugh. It is necessary to demonstrate its reasonableness.

There are clear regulations that the overhead lines of 10kV and below are strictly forbidden to cross the first-class gas environment, and the horizontal distance between the overhead line and the first-class gas environment should not be less than the times of the height of the tower. In special cases, after taking effective measures, the distance can be appropriately reduced. Hope!

1) The pole is withered and broken, the wire is broken or placed on the flammable material, which is easy to cause a short circuit of the line, and there is an electric spark and arc.

2) The pole spacing is too large, the line spacing is too small or the wiring is too loose, there is no tension, under the action of strong wind and external force, it is easy to touch together to cause a short circuit, in addition, the wire is too tight when wiring, and the wire is prone to break accidents, leading to quiet disasters or electric shock accidents.

3) If the overhead line is struck by lightning, the line insulation will be damaged, and the down-frequency short-circuit arc will be generated, so that the line will trip and affect the normal power supply of the power system.

a.When the flammable gas is heavier than air, the cable should be buried or laid overhead at a higher place, and the non-armored cable should be mechanically protected by threading pipes or placing it in trays and slot boxes.

b.When the flammable gas is lighter than air, the cable should be laid in the pipe and ditch at a lower level, and the unarmored cable in the ditch should be buried with sand.

2) When the cable is laid along the pipeline that transports flammable gas in the air, it should be arranged on the side of the pipeline with a low degree of danger, and should comply with the following provisions.

a.When flammable gas is heavier than air, the cable should be placed above the pipe.

b.When flammable gas is lighter than air, the cable should be placed under the pipe.

3) Cables, pipes, and ditches passing through the holes in walls and plates between different areas should be tightly blocked with non-combustible materials.

4) There should be no joints in the cable line, and if the joints are used, they must be explosion-proof.