(1) Method of the indication of power cables

1. Method of the cable model

In order to accurately indicate the purpose, structure and titles of cables, the standard "Cable External Protection" GB/T 2952-1989 is specified to use Pinyin letters and digital combinations to indicate the category and model of the cable. Models are usually indicated by the uppercase Chinese pinyin letters that cable insulation and internal and external protective layers use pinyin letters plus digital combinations that not only can not only completely reflect the category and use of the cable, but also the main structures, materials, and laying occasions of the cables. The characteristics are clear.

Note: Add Pinyin letters ZR- to the flame retardant series in front of the cable type, NH- indicates a refractory series.

(2) Classification of power cables

Power cables are generally divided into polyvinyl chloride insulation (plastic) power cables, cross -linked polyethylene insulated power cables, rubber insulating power cables, oil supply and oil -soaked insulating electric cables according to their insulation types, and can be divided into the working type and nature. Generally, ordinary power cables, overhead power cables, mines under the mines, power cables, underwater power cables, anti -(resistant) flame -retardant power cables and other types.

(3) Several commonly used cables and their characteristics

1. Copper Conduct Power Cable

At present, the domestic low -voltage power cables are co -twisted with the core wires. This structure of the cable has poor anti -interference ability, and the function of anti -lightning strikes is poor. Electric appliances are reliable.

2. Lingyin polyethylene insulation power cable

Referred to as XLPE cable, it uses a chemical or physical method to transform the insulated data of the cable's insulated data polyethylene plastic from a line structure to a three -dimensional mesh structure, that is, transforming polyethylene that was originally thermoplasty into armal cross -linked polyethylene polyethylene Plastic, which greatly improves the heat resistance and service life of the cable, and still maintain its excellent electrical function.

3. Polyvinyl chloride Insulation Polyvinyl chloride Guarded Power Cable

Polyethylene insulation Polyvinyl polyvinyl polyvinyl polychinic pyramids do not exceed 70 ° C for a long time, and the high temperature of the cable conductor does not exceed 160 ° C. The duration of the short -circuit head does not exceed 5s, and the low temperature of the construction should not be lower than 0 ° C.

The above is the low -voltage cables of the British Federation for us. I hope it will help our work.