كابل الطاقة Xlpe/PVC

Graded by voltage

According to the voltage level, it can be divided into medium and low voltage power cables (35 kV and below), high voltage cables (110 kV and above), ultra-high voltage cables (275 ~ 800 kV) and ultra-high voltage cables (1000 kV and above). In addition, it can also be divided into AC cables and DC cables according to the current system.

Divided by insulation material

1. Oil-impregnated paper insulated power cable Power cable insulated with oil-impregnated paper. It has the longest application history. It is safe and reliable, long service life, low price. The main disadvantage is that the laying is limited by the drop. Since the development of non-dripping paper-impregnated insulation, the problem of drop limitation has been solved, so that oil-impregnated paper-insulated cables can continue to be widely used.

2. Plastic insulated power cable The insulation layer is extruded plastic power cable. Commonly used plastics are polyvinyl chloride, polyethylene, crosslinked polyethylene. The plastic cable has the advantages of simple structure, convenient manufacturing and processing, light weight, convenient laying and installation, and is not limited by laying drop. Therefore, it is widely used as a medium and low voltage cable, and has the trend of replacing viscous impregnated oil paper cables. Its biggest disadvantage is the presence of dendritic breakdown phenomenon, which limits its use at higher voltages.

3. The insulating layer of rubber insulated power cable is rubber plus various adjuvants, extruded on the conductive wire core after full mixing, and vulcanized by heating. It is soft and elastic, suitable for frequent movement and small bending radius of laying.

Commonly used as insulation materials are natural rubber - styrene butadiene rubber mixture, ethylene-polypropylene rubber, butyl rubber and so on.

Graded by voltage

1. Low-voltage cable: suitable for fixed laying in AC 50Hz, rated voltage 3kv and below on the transmission and distribution lines for electricity transmission.

2. Medium and low voltage cables: (generally 35KV and below) : PVC insulated cables, polyethylene insulated cables, cross-linked polyethylene insulated cables, etc.

3. High-voltage cable: (generally 110KV and above) : polyethylene cable and cross-linked polyethylene insulated cable.

4. Ultra-high voltage cable: (275 ~ 800KV).

5. Uhv cable: (1000KV and above).sort

Graded by voltage

According to the voltage level, it can be divided into medium and low voltage power cables (35 kV and below), high voltage cables (110 kV and above), ultra-high voltage cables (275 ~ 800 kV) and ultra-high voltage cables (1000 kV and above). In addition, it can also be divided into AC cables and DC cables according to the current system.

1. يستغرق مساحة أقل. بشكل عام، يتم دفنها في التربة أو وضعها في الداخل، أو الخنادق، أو الأنفاق، ومسافة العزل بين الخطوط صغيرة، ولا تستخدم الأعمدة والأبراج، وتحتل مساحة أقل من الأرض، ولا تشغل مساحة سطحية بشكل أساسي.

2. موثوقية عالية. يتأثر قليلاً بالظروف المناخية والبيئة المحيطة، وأداء نقل مستقر وموثوقية عالية.

3. لديها ظروف أكثر ملاءمة لتطوير الضغط العالي للغاية والقدرة الكبيرة، مثل درجة الحرارة المنخفضة وكابلات الطاقة فائقة التوصيل.

4. السعة الموزعة الكبيرة.

5. أعمال صيانة أقل.

1. Crosslinked polyethylene insulated cable has excellent dielectric properties, but poor resistance to corona and ionization discharge.

2. Polyethylene insulated cable has good process performance, easy processing, poor heat resistance, easy deformation, easy to delay burning, easy to crack.

3. Polyvinyl chloride insulated cable is chemically stable, non-combustible, and has sufficient material sources.

4.The higher insulation performance of power cables is oil-impregnated paper insulated cables.

1. The current carrying capacity of the power cable mainly depends on the maximum allowable temperature and the ambient temperature around the cable, the structural ruler of each part of the cable and the material characteristics and other factors. So that the stable temperature of the wire reaches the maximum allowable temperature of the cable, known as the allowable current or safe current.

2. The cross-linked polyethylene insulated cable conductor is allowed to work for a long time. The temperature is 90℃. The voltage class of the natural rubber insulated cable is 6kW, and the long-term allowable operating temperature of the cable conductor is 65℃. The voltage class of polyethylene insulated cable is 10k state, and the long-term allowable operating temperature of the cable conductor is 70 ° C. The voltage class of the polyethylene insulated cable is 6k, and the long-term allowable operating temperature of the cable conductor is 65℃.