1. Products Introduction

    XLPE insulated power cables are superior in thermomechanical properties, electrical characteristics and chemical resistances.Theyare not only simple in construction and light in weight but also no limitation is required to the difference of levelin installation along theroute.This kind of up-to-date cables is widely used in electrical power nets in cities,mines and factories.

   The insulation of the cable-XLPE is manufactured badopting a chemical or physical process of cross-inking of the molecularstructure. During the processthe cross inkable insulation is transformed from its linear chainstructure into a three-dimensional networkstructure owing to this substantive transtormation,the thermomechanical propertiesofthe cable insulation are greatly improved while itssuperior electrical characteristics remain unchanged.

    The maximum permissible continuous conductor operating temperature of XLPE insulated power cables is 90'c,which is higher thanthat of paper,PVC,or PE insulated cables.The current ratings of the XLPE insulated cable further increase.

    All the main equipment for producing XLPE insulated cables with rated voltages up to and including 26/35kv were imported formadvanced countries TROESTER of Germany and DAvlS of UsA equipped with X-ray eccentricity gauges, conductor preheaters and partial discharge equipment.

     To meet the broad users needs. our company has successfully developed up-to-date flame-retardant type. ow smoke low halogentype. low smoke non-halogen type and watertight type XLPE insulated power cables. Cables of flame-retardant type. low smoke lowhalogen type,low smoke non-halogen type are suited for USB where emphasis is placed on special performanee of fame retardancysuch as high-rise buildings, hospitals, tunnels, power plants, petrochemical works, mines, etc; while the cables of watertight type are usedin the places where waterproof is strictlv realuired.

     The above products, having been tested, are in contormity with the regurements ot the standards ot GB/2/06.2-2u2u、GB/T18380-2020、GB/T17650-1998、GB/T17651-1998、EC60502-2:2005、EC60332-200、EC61034-1997 and 1EC60754-1994.

2.Standard complied with

GB/T12706.2-2020 Powercables with extruded insulation and their accesseries for rated voltages form 1kV(Um-1.2kvup to and including35kV(Um=40.5kV).

1EC60502-2:2005 Power cables with extruded insulation and their accessories for rated voltages form ikV up to 30kv.

3.Service performance

Operating temperature Max.Permissible continuous operating temperature of conductors shall nol exceed 90'C.

Short circuit temperature of conductor ax.Short circuit temperature shall not exceed 250'℃(Max.sustaining period:not exceeding 5sec.).

XLPE Insulated Power Cable production technical process

Copper rod—wiredrawing—intertwist—extrusion (innerscreen,insulation ,outer screen)—undersheathextrusion—cable forming—partial discharge andvoltage withstand test—copper tapewrapped shield—wrapping of steel
tape—sheath extrusion—Partial discharge andvoltage withstand test—ready product storing

Min.bending radius at laying

Remark:D-Overall diameter of cable

Laying temperature:The laying temerature is not less than 0°C

The laying method and reference parameters used to calculate the current carrying capacity of the cable: Laying in air: ambient temperature 40°C Laying in soil: ambient temperature 25°C The thermal resistance coefficient of the soil is 1.0°C·m/W

Layout of cables Layout of single core cables: in parallel (Spacing side by side: lD D=overall diameter) Mulitcore cables: laid
individully

4.Constructed Profiles of the Products 

5.Type,description and main applications

Remark:Steel tape armoured si ngle-core cables are used only in D.C,power supply system. lf they are used in A.Cpower supply system aluminum wires or other types of armour are adopted.

6. Scope of cables

Flame retardant XLPE insulated cables,watertight XLPE insulated cables,low smoke low halogen and low smoke non-halogen XLPE insulated cables are also available on request.

The type designation for flame retardant cables is classified depending on the performance of buming test on bundled cables,separatelyexpressed by addition of derivation-ZRA,-ZRB or -ZR. lf no classification of fame retardancy or just derivation-ZR is indicated by the user,the flame retardant requirement is undemtood to reach class C,e.g. ZR-YJV,,-8.7/10 3x400

For Watertight type XLPE insulated cables, the derivation code is FS,e.g. FS-YJV:2-8.7/10 3x240

For low smoke non-halogen type XLPE insulated cables, the derivation code is WD-YJY₂₂-8.7/103x300

7. Product constructions and main technical parameters