Aerialinsulated cables

Aerialinsulated cables

1.Range ofapplication

The products can be applied in the transmission and distributionsystem ofaerial power lines with rated voltage from 1kV to 35kV

2.Executive standard

Aerial insulated cables for rated voltage up to and including 1kVconform to GB12527-2008

Aerial insulated cables with rated voltage of 10kV conform to GB14049-2008.

Aluminum conductor steel-reinforced aerial insulated cables withrated voltage of 1 kV comply with -The enterprise standard.

Aerial insulated cables for rated voltage up to and including 35kVcomply with -The enterprise standard.

3.Type and descrition

4.Operating characteristics

1.Rated voltage: U=1kV,10kV,20kV and 35kV.

2.Temperature of cable laying should not be lower than-20℃

3.Max.temperature of cable in short-cifcuit (Max.duration lessthan5s):

For XLPEinsulation:250CFor HDPEinsulation:150CFor PVCinsulation:160℃

4.Max.long-term operation temperature ofconductors:For PVC insulation:≤70℃

For polythene in Sulation:s70℃

For XLPEinsulation:≤90℃

5.Allowable bendlng radius:

For single cofe cables> 15 times of outer diamerer

For multi-core cables>10 times ofouter diameter

5.Scope of production

Note: 1. Krefers to bearing strand, it can choose any arranged section of table with corresponding conductor, lf span ofpoles is longer and addtional bearing track rope is adopted, the track rope isntincluded in the cable structure.

2，(A)refer to steel bearing strand，(B)refer to A-allov bearing strand.

3，Besides, we can produce steel core aerial insulated cables according to the requirements of customers

6.Maintechnicalindex

1.Operatillg temperatureFor aerial insulated cables with rated voltage of 1 kV,the operating tempof PVC and polythene insulated ones should not exceed 70C and XLPEinsulated ones should not exceed 90C . For aerial insulated cables withrated voltage of 10kV and 35kV,the operating temp. of XLPE insulatedones should not exceed 90℃，and HDPE insulated ones should notexceed 75℃.

2.Resistance and tension force of cables refer to following table

3.Insulation resistance of cables

4.Insulation resistance of aerial insulated cables with rated voltage of 1kVrefer to following table . For finished cables with rated voltage of 10kVand 35kV without instllatio screen . if immersed in water for less than 1h.and impose a DC voltage from 80V to 500V the stable time shall be betwe-en 1 to 5 mins. For cables with rated voltage of 10kV.tile insulation resistance shall be not less than 1 500MΩ· km. for light-duty thill insulated cables. the insulation resistance shall be not less than 1 000MΩ· km, for thecables with rated voltage of 35kV the insulation resistance shall be notless than 4100MΩ· km.

5. Partial discharge testPartial discharge test shall be done on 10kV insulated screened cables.The test is carried out on a drumined cable which is immersed into waterand AC voltage of 9kV is imposed, and tile discharge of cable should notexceed 20pC.

7.Current-carrying capacity

Corre ction coeficie nt ofcurrent-carrying capa city at different ambient temperatures

8.Operating requirements

1.Cables shall be laid at a temp. highel than. 20°C.Iftemp. is lower1than-20°C，cables shall be ple-heated beforelaying.

2.When the cables are being laid. the belldillg radlLIS of aeriali11SUlated cables with rated voltage 0f 1kV shall not be less than 10times of outer diameter of cables and the ones of aerial insulatedcables with a rated voltage of 1 0kV, 20kV and 35kV shall not beless thall 15 times of outer diametel of cables.

3.Setting methods of cables are the Same with the one of bare wiresthat is to fix it on a crossing insulator and yet the distance can beeduced property.

4.Cables shall be applied in conjunction with exclusively-designedaerialinsulated cables fittiings.

5.During the laying and storage of cables，please ensure the tight-ness of cable ends in case water goes into cables and affects itsProperty.

6.The long-term operating temp(allowable long-term operatingtemp.of conductor)for XLPEinulated cables shall not exceed90°C.and shall not for exceed 75°C for HDPE insulated cables,for polythene and PVC insulated cables. it shall not exceed 70°C in a short- circuit. with max. duration within 5s，the temp. of XLPEinsulated cables shall not exceed 250C，and for HDPE，polytheneand PVC,it shall not exceed 150°C