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Three Core 18/30KV Medium Voltage Unarmored Cable

Three Core 18/30KV (Um=36KV) Unarmored Cable

Voltage: 18/30kV

Conductor: Copper or Aluminum

Operating Temperature: up to 90°C

Short Circuit Temperature: 250°C

Bending Radius: 15 x OD

Email: manager@hdcable.com.cn

   APPLICATIONS

XLPE(Cross linked polyethylene) insulated cable functions well for electricity transmission and distribution lines for its excellent electrical and physical properties, including the advantage of simplicity in construction, lightness in weight; convenience in application besides its excellent electrical, thermal, mechanical and anti-chemical corrosion properties.

GB/12706-2008, IEC60502,IEC 60228,IEC60332 BS 5467,BS 6622 , IS 1554 , IS 7098and ICEA S-66-524 etc.


CONSTRUCTION :

Conductor: Plain annealed stranded compacted circular copper or aluminium conductor to IEC60228 class 2

Conductor Screen: Extruded semi-conductive compound

Insulation: XLPE (cross-linked polyethylene) rated at 90°C

Insulation Screen: Extruded semi-conductive compound

Metallic Screen: copper tape or a concentric layer of copper wires

Color for core identification: Red, Yellow ,Blue tape shall be applied between insulation screen and metallic screen ( The above identifying can be changed as user requirement)

Assembly : Three screened cores are laid up together ,if necessary filled with non-hygroscopic material compatible with insulation and covered with a layer of PVC sheath

Outer Sheath: PVC type ST2 to IEC 60502 or PE ,LSZH

DIMENSIONAL DATA :
Three Core 18/30KV Medium Voltage Unarmored Cable
 
 

Specification

Outer diameter

Nominal thickness of insulation

Nominal sheath thickness

 Approx. Outer diameter of cable

Approx. Weight of cable

Ampacity of cable

Air

Soil

CU

AL

Cu

Al

Cu

Al

mm2

mm

mm

mm

mm

kg/km

kg/km

A

A

A

A

3×25

6.0

8.0

3.0

61.5

3649.8

3183.5

125

98

135

105

3×35

7.0

8.0

3.0

63.8

4152.9

3500.0

150

115

160

125

3×50

8.4

8.0

3.1

67.0

4835.5

3902.8

180

140

190

145

3×70

10.0

8.0

3.2

70.7

5671.0

4365.3

220

170

230

180

3×95

11.5

8.0

3.4

74.1

6657.3

4885.1

265

205

275

215

3×120

13.0

8.0

3.5

77.6

7644.8

5406.4

305

235

315

245

3×150

14.5

8.0

3.6

81.0

8772.7

5974.6

345

270

355

275

3×185

16.2

8.0

3.7

84.9

10070.4

6619.4

390

305

400

310

3×240

18.4

8.0

3.9

90.0

12003.2

7526.3

455

355

460

360

3×300

20.5

8.0

4.0

94.8

14060.2

8464.1

525

410

520

410

3×400

23.5

8.0

4.2

101.8

17364.8

9903.3

600

470

590

465

TECHNICAL PARAMETERS :
 Max. Permissible D.C. resistance of conductor at 20℃ 

Nominal section area (mm2)

Copper conductor(Ω/km)

Aluminum conductor(Ω/km)

1.5

12.1

-

2.5

7.41

12.1

4

4.61

7.41

6

3.08

4.61

10

1.83

3.08

16

1.15

1.91

25

0.727

1.20

35

0.524

0.868

50

0.387

0.641

70

0.268

0.443

95

0.193

0.320

120

0.153

0.253

150

0.124

0.206

185

0.0991

0.164

240

0.0754

0.125

300

0.0601

0.100

400

0.0470

0.0778

500

0.0366

0.0605

630

0.0283

0.0469

Max. Permissible short-circuit current for conductor (reference value)

Nominal section area (mm2)

Maximum permissible short-circuit current for conductor(1s)(KA)

Copper conductor

 Aluminum conductor

1.5

0.12

0.13

2.5

0.32

0.22

4

0.50

0.34

6

0.76

0.51

10

1.51

0.99

16

2.39

1.56

25

3.69

2.42

35

5.15

3.37

50

7.31

4.79

70

10.2

6.68

95

13.8

9.03

120

17.4

11.4

150

21.7

14.2

185

26.7

17.5

240

34.6

22.6

300

43.1

28.2

400

57.4

37.65

500

71.7

47.0

630

88.8

58.0

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