Yjv, Yjy, Yjlv, Yjly High Voltage XLPE Cable

Yjv, Yjy, Yjlv, Yjly High Voltage XLPE Cable

Yjv, Yjy, Yjlv, Yjly High Voltage XLPE Cable

YJV, YJY, YJLV, YJLY

Indoors,Tunnel,Channel and Underground

XLPE

PVC or PE

High Voltage

Aluminium or Copper

Jinshui

Wooden Drum, Iron Wooden Drum, Iron Drum

Henan, China (Mainland)

Product Description

 

1.      Rated Voltage of Power Cable

Uo is the AC rated voltage(effective value)of metal screen,metal armor and metal sheath of conductor used in power cable design.The insulation structure design of cable and electric test all adopt Uo as the standard.It reflects the insulation level of power cable.

U is the AC rated voltage(effective value)of phase conductor in power cable design.It is not only related to insulation level of power cable,but also to system earthing style and power cable category in using power cable.

Um is the maximum value of the highest system voltageto be borne by equipment.

2.      Category of Power Cable

According to the sustained time of earthing breakdown,power cable is divided into two categories:

Category 1:The sustained time of earthing breakdown does not exceed 1 minute,that is,it requires a system when any phase conductor contacts the earth or earthing conductor,can separate the phase conductor from the system in 1 minute.

Category 11:The sustained time of each earthing breakdown usually should not exceed 1 hour,the longest not exceeding 8 hours and the accumulated time in a year should not exceed 125 hours.

For the insulation level of two categories of cable,see the following table.

Table 1 Category and Rated Voltage of Power Cable

U

Um

Uo

KV

kV

kV

Category 1

Category 11

6

7.2

3.6

6

10

12

6

8.7

15

18

8.7

12

20

26

12

18

35

42

21

26

110

 

64

 

 

Table 2 Thickness and Requirements of Insulation Layer of 6-110kV XLPE Insulation Power Cable

       Rated Voltage

Conducting     kV

Wire Core

6/6,

6/10

8.7/10,

8.7/15

12/20

18/20

18/30

21/35

26/35

64/110

Cross

Section

Area

mm2

No./Wire

Dia.

mm

Extruded

Overall Dia.

Mm

Av.

Thickness

Thinnest

Thickness

Av.

Thickness

Thinnest

Thickness

Av.

Thickness

Thinnest

Thickness

Av.

Thickness

Thinnest

Thickness

Av.

Thickness

Thinnest

Thickness

Av.

Thickness

Thinnest

Thickness

Av.

Thickness

Thinnest

Thickness

Core

Shift

Degree

25

7/2.25

6.0

 

3.4       2.96      4.5    3.95   5.5    4.85  8.0     7.0   9.3    8.27   10.5   9.35

 

35

7/2.62

7.0

50

7/3.10

8.3

70

19/2.25

10.0

95

19/2.62

11.6

120

19/3.0

13.0

150

36/2.36

14.6

185

36/2.62

16.2

240

36/3.00

18.4

19.0

17.10

 

0.10

300

36/3.36

20.6

18.5

16.55

400

60/3.00

23.8

17.5

15.75

500

60/3.36

26.6

17.0

15.30

630

60/3.75

30.0

16.5

14.85

800

60/4.26

34.0

16.0

14.40

1000

60/4.75

38.2

16.0

14.40

1200

60/5.2

42.0

16.0

14.40

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