XLPE Insulated Power Cable with Rated Voltage up to 35 kV

XLPE Insulated Power Cable with Rated Voltage up to 35 kV

1.Scope ofapplication

The cable is used to transmit power on the powertransmission and distribution line of A.C.50Hz, rated voltage 35 KV or lower. By comparison with power cable withPVC insulation, it has not only excellent electric perfor-mance, mechanical performance, heat & aging resistantperformance,weather resistant performance,chemicalcorrosion resistant performance, but also simple structure.light weight, no restriction by laying drop, and high tem-perature allowance for long term working(90C) as well

2.Executive standard

As section“extruded insulation power cable withrated voltage from 1kV(Um=1.2 kV)to 35kV(Um=40.5 kV)”stipulated in GB/T12706.1-2008-GB/T12706.32008 or IEC60502-2004 according to the re- quirement ofthe customer.

3.Working Condition

1, Long-term working temperature by cable conductor is 90℃.

2、Max. temperature of cable conductor shall be no morethan 250℃ during short circuit (the longest lasting timeshall be no more than 5 seconds).

3、Environment temperature for installation is no less than0℃

4、Min bending radium of cable:It is no less than 15 times that of cable outer diameterfor cable with three cores.lt is no less than 20 times that of cable outer diameterfor cable with single core.

5、A.C. rated voltage Uo /U of cable is 0.6/1kV26/35kV.Uo : rated A.C.voltage of conductor to earth ORbetween metallic shielding for cable designing, whichis called phrase voltage.

U: rated A.C. voltage between conductors for cabledesigning, which is called wire voltage.Um : Max endurable value of “Max system voltage”for cable

4.Type，Description and Application Occasion

Note:1: We also produce steel wire armored cross-linked power cable such as YJV32,YJLV32,YJV33, YJLV33 according to the recuirement of the customer.

2: Prefix “ZR”(flame retardant type) shall be added to the original type when flame retardant type cable is needed.

5.The Figure of Cable Structure

6.Production Scope

7.Main Technical Parameter of Cable

Max value of conductor DC resistance at 20C shall meetthe requirement of category 2 conductor stipulated in GB/T3956 standard.

 A.C.Voltage Test under Power Frequency

Partial discharging capacity shall be tested at the voltageof 1.73Uo , and its value shall be no more than that stipulatedin the following table:

4.Current-loading Capacity of Cable

Currentloading capacity correcting coefficient under different heat-resistant coefficient of soil

Current-loading capacity correcting coefficient under different soil temperature

4.1Low voltage XLPE Power Cable (0.6/1kV)

Current-loading capacity correcting coefficient under different air temperature

4.2 Middle voltage cross-linked Power Cable(3.6kV~35kV)

Current-loading capacity correcting coefficient under different air temperature

Note: 1. Air temperature is 40C.

2.Distance between two close cables amount to outer diameter ofcable when being arrayed in parallel for cable with single core.

 In the soil

Note: 

1.Soil temperature is 25'C. Heat-resistant coefficient of soil is 1.0C.m/w.

2.Distance between two close cables amount to outer diameter of cable when being arrayed in parallel for cable with single core

3. You can refer to that of inarmored cable about curent-loading capacity of armored cable, which is relevantly smaller compared with that of inarmored cable.