Overhead Insulated Cable from China manufacturer - Beijing Tianyuan Rongli Technology Co., Ltd.

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Rated voltage: 0.6 / 1KV and 10KV2.
Operating temperature: polyvinyl chloride insulation is 70℃, cross-linked polyethylene insulation is 90℃, the maximum cable temperature is 160℃ and 250℃ 2, respectively.
Ambient temperature: not less than-20℃ 2.
Bending radius: cables with rated voltage lower than 1KV shall not be less than 4D or 6D, and cables with rated voltage lower 10KV shall not be less than 20 (D + D) 2.
These features make overhead insulated wires suitable for a variety of environmental and application scenarios, especially in complex terrain and limited funding areas, and their low cost and high reliability make it an ideal solution.
Main Features

1. High reliability of power supply
The use of overhead cable can greatly reduce all kinds of short circuit faults (especially the common flashover faults of the overhead bare wire), compared with the overhead bare wire, the failure rate is 4-6 times lower.
2. the power supply safety is good, the use of overhead cable to make personal electric shock injury accidents greatly reduced.
3. erection and maintenance of convenient overhead cable can be erected on any kind of tower, can also be erected along the wall, in special cases, can also be passed through the trees, directly fixed on the tree pole with gold.
4. Reasonable economy
Although the overhead cable is more expensive than the overhead bare wire, it is cheaper than the ordinary underground cable. Therefore, although the one-time investment of overhead cable is slightly higher, the operation cost will be significantly lower than that of overhead bare wire.

Competent

High voltage overhead cable insulation, in addition to must meet the high electrical performance requirements, but also requires a good weather resistance, in order to work safely under sunlight irradiation for a long time.

Dielectric level

When the overhead cable is used, because the voltage to the ground is not completely added to the cable insulation, most of the ground is borne by the air medium, so the insulation performance of the overhead cable is high, and is obviously better than the general ordinary oil paper and cross-linked cable.

Inner and outer semi-conductive shielding layer

1KV low-voltage overhead cable, because the electric field strength of the conductor surface is very low, do not need to use the internal semi-conductive shielding layer. When the overhead cable is close to the ground body, the electric field strength on the surface of the 10kV overhead cable conductor is 2~3kV / mm, and the electric field strength on the surface of the 35kV overhead cable conductor can be as high as 5kV / mm, which has to use the inner semi-conductive layer.

It is not necessary to use the outer semi-conductive shielding layer, but the three-core cable overhead cable above 10kV must use the outer semi-conductive shielding layer. Because the external electric field of the three-core overhead cable is not uniform, if there is no external semi-conductive shielding layer, the corona discharge will be very strong when the air is wet.

Overhead insulated lines are widely used in many fields, including transmission, distribution, power supply and communication.

Transmission field

In the field of transmission, overhead insulated lines are mainly used to transmit high-voltage power, and its high-strength support system makes it the preferred scheme for high-voltage power transmission.

Distribution field

In the distribution area, overhead insulated lines are used to provide power services to some areas or even entire cities. Its advantages are simple installation, low cost and convenient maintenance for residential, commercial and industrial areas.

Power supply field

In the field of power supply, overhead insulated lines to support the circuit, especially in the need of more than a certain.