APPLICATION RANGE OF POWER CABLE AND ITS ADVANTAGES

Cables can be divided into: power cables, control cables, communication cables, radio frequency cables, constant temperature cables, temperature control cables, etc. Power cables transmit and distribute high-power electrical energy. Above 35 kV are called medium and low voltage cables, or power distribution cables, and those above 110 kV are called high-voltage cables or transmission cables.

Application of power cable:

According to the urban planning, the prosperous areas, important areas, main roads, high-rise buildings and city appearance environments have special requirements, and the overhead lines and line conductors are technically difficult to solve through severely corroded areas, and the reliability of power supply is relatively high. districts, coastal areas, important power supply areas in major cities vulnerable to tropical storms, areas with high grid operation.

Basic characteristics of power cables:

Good electrical conductivity, good environmental adaptability. 6 properties: electrical (conductivity, insulation, transmission properties), mechanics (tensile strength, elongation, flexibility, elasticity, vibration resistance, abrasion resistance, impact resistance), thermal (heat-resistant grade of power cables), corrosion resistance , Weather resistance, aging resistance.

Line characteristics of power cables:

Power cable lines are another important way to transmit electric energy besides overhead lines. Power cables use the core of the cable to conduct electricity to transmit energy, generally buried in the ground or underwater, or in pipes, channels, and tunnels. The application is very common and widely recognized.

Advantages of power cables:

(1) Not affected by tree growth.
(2) The cable line is less affected by the building.
(3) It is less affected by external climatic conditions and environmental disturbances.
(4) The operation of the cable line is simple and convenient, the maintenance workload is small, and the maintenance cost is low.
(5) The power transmission capacity of the power cable line is relatively large, which helps to improve the power factor of the power system.
(6) The power cable lines are laid underground without occupying ground space, and the same channel can accommodate more circuits.
(7) Power cables are generally buried in soil or trenches, tunnels, saving wood, rigid materials and cement, reducing harm to people, and being beautiful and tidy.