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In which areas are overhead insulated conductors suitable for application
Release time:
2021-07-15
The application areas of overhead insulated conductors are as follows: the distance between overhead lines and buildings cannot meet the requirements of the Technical Code for Design of Overhead Distribution Lines, and cable lines cannot be used
Aluminum-clad steel core aluminum stranded wire manufacturersTell you what,overhead insulated conductorThe application areas are as follows:
1. The distance between the overhead line and the building cannot meet the requirements of the "Technical Code for Design of Overhead Distribution Lines", and cable lines cannot be used.
2. Metal floating dust and pollution area. In polluted areas such as thermal power plants and chemical plants, short circuits and ground faults often occur on overhead distribution lines. The use of overhead insulated conductors for 10kv distribution lines is a good way to prevent short-circuit grounding.
3. In the salt spray area, the salt spray corrodes the bare wire very seriously, which greatly reduces the tensile strength of the bare wire. In case of wind and rain, the wire will break, which is easy to cause short circuit grounding accident. Overhead insulated conductors can better prevent salt spray corrosion.
4, lightning more areas, overhead insulated wire has a layer of insulation protection layer, can reduce the line lightning, reduce the grounding fault power outage time.
5. Reconstruction of the old city. Since the overhead insulated conductor can withstand 15kV voltage, the minimum vertical distance between the insulated conductor and the building is 1m, and the horizontal distance is 0.75m. Therefore, the use of 10kV overhead insulated conductors instead of low-voltage mains directly sent to the load center can reduce the space occupied by distribution lines.
6, the typhoon area. Due to the poor anti-typhoon ability of the overhead bare conductor, the line trips one after another when the typhoon comes. When overhead insulated wires are used, the instantaneous collision of the wires will not cause short circuits, which reduces faults and greatly improves the anti-typhoon ability of the line.
7. Overhead insulated conductors shall be used for low-voltage power distribution system.
8, in addition, there are high-rise building areas, densely populated small towns, bustling street areas, landscape areas, forest areas.
The advantages of overhead insulated wires are different from ordinary overhead bare wires:
1. Good insulation performance
Overhead insulated conductors have better insulation performance than bare conductors due to the addition of a layer of insulation. It can shorten the line phase distance, reduce the insulation requirements of the line support components, improve the number of circuits on the same tower, and prevent the phase short circuit caused by external objects.
2. The overhead insulated wire is covered with a layer of plastic, which is less corroded than the bare wire and improves the service life of the line.
3. Simplify the tower structure
It can simplify the structure of the line tower and even lay it along the wall, which not only saves the line material, but also beautifies the city streets.
4. In-depth load center
It is convenient for high voltage to go deep into the load center, reduce the power supply radius of low voltage line, and improve the voltage quality.
5, conducive to urban greening
It is conducive to urban construction and greening, and reduces the amount of pruning of trees under the line.
6. Reduction of line corridors
It saves the space occupied by overhead lines, facilitates overhead lines to cross in narrow channels, and reduces line corridors. Compared with the overhead bare line, the line corridor can be greatly reduced.
7. Overhead insulated wires extend maintenance cycle
Due to the improvement of the technical conditions of the line, the maintenance workload is reduced, the maintenance cycle is extended, and the maintenance power outage time is reduced.
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