The classification for power Cables are introducedSep 16, 2017
By voltage class .
Voltage class can be divided into medium and low voltage power cables (35 thousand volts and below ) , high voltage cables (over 110 thousand volts ) ,
EHV cables (275~800 kV ) , and extra high voltage cables (1 million volts or more ) . In addition , It can be divided into alternating current cable and direct current cable according to current system .
Accordingto insulation material
1 、 oil impregnated paper insulated power cable with oil impregnated paper as insulated power cable . Its application history is the longest .
The utility model has the advantages of safety , long service life and low price . The main drawback are that the installation is limited by the drop .
Since the development of insulation paper after dripping tidewater dip solution , drop restrictions ,sot that the oil paper insulated cable continued widely used .
2 、 plastic insulated power cables insulation layer is extruded plastic power cable . Commonly used plastics are PVC , polyethylene and cross- link polyethylene . The plastic cable have the advantages of simple structure , convenient manufacture and processing , light weight , convenient laying and installation and no limitation of laying limit .
Therefore , It is widely used as medium and low voltage cables and has the tendency to replace viscous impregnated oil paper cables .
3 , rubber insulated power cable insulation layer for rubber , coupled with a variety of complex agent , after fully mixing , squeezed on the conductive wire core , after heating vulcanization .
The utility model is flexible and flexible , and is suitable for occasions for frequent movement and small bending radius .
By voltage class
1 、 low voltage cable : suitable for fixed transmission in the AC 50Hz , rated voltage 3KV and below transmission and distribution line road for the transmission of electricity .
2 , medium and low voltage cables : (generally refers to 35KV and below ) : PVC insulated cables , polyethylene insulated cables , XLPE insulated cables , etc .
3 , high voltage cable : (usually 110KV and above ) : polyethylene cable and XLPE insulated cable .
4, EHV cable: (275~800 kV).
5, UHV cable: (1 million volts and above)