Tianjin Feiya Wire&Cable Co.,Ltd

Product Detail
Medium Voltage Cables to VDE 0276  Three Core Cables to VDE 0276
Detail

Application
The three core cables are designed for distribution of electrical power with nominal voltage Uo/U ranging from 3.6/6.6KV to 19/33KV and frequency 50Hz. They are suitable for installation mostly in power supply stations, indoors and in cable ducts, outdoors, underground and in water as well as for installation on cable trays for industries, switchboards and power stations.

Standards
DIN VDE 0276 Part 620 -622
HD 620 S1

Construction

Conductor: Stranded compacted circular copper or aluminium conductors according to IEC 60228 class 2 / VDE 0276 class 2. VDE 0295 HD 383. All internal interstices of the conductor are filled with water blocking compound to prevent ingress of water through conductor during storage, handing, installation and operating of the cable.
Conductor Screen: The conductor screen consists of an extruded layer of non metallic, semi-conducting compound firmly bonded to the insulation to exclude all air voids. The screen has a minimum thickness of 0.3mm and the maximum volume resistivity of 500 Ohm-m at 90°C.
Insulation: Insulation is of extruded XLPE compound type 2XI1 according to DIN VDE 0207 part 22 and HD 620.1 with high degree of cross-linking, free from contaminants, air voids and heat resistant by dry cured process.
The nominal insulation wall thickness is shown in table 1.
Table 1. Insulation Thickness

Nom. Cross-Section
Area

Insulation Thickness at Nom. Voltage

3.6/6kV (Um=7.2)kV

6/10KV (Um=12KV)

8.7/15KV (Um=17KV)

12/20KV (Um=24KV)

18/30KV (Um=36KV)

mm²

mm

mm

mm

mm

mm


XLPE

XLPE

XLPE

XLPE

XLPE

35

2.5

3.4

4.5

5.5

-

50

2.5

3.4

4.5

5.5

8.0

70

2.5

3.4

4.5

5.5

8.0

95

2.5

3.4

4.5

5.5

8.0

120

2.5

3.4

4.5

5.5

8.0

150

2.5

3.4

4.5

5.5

8.0

185

2.5

3.4

4.5

5.5

8.0

240

2.6

3.4

4.5

5.5

8.0

300

2.8

3.4

4.5

5.5

8.0

400

3.0

3.4

4.5

5.5

8.0

Insulation Screen: The insulation screen consists of extruded non metallic, semi-conducting compound extruded over the insulation. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating. The minimum thickness is 0.3mm and the maximum volume resistivity of 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site.
Conducting Water Blocking Layer: The insulation screen may be covered by semi- conductive water blocking tape which will swell up under the influence of moisture of water to ensure longitudinal watertightness.
Metallic Screen: Copper wires are applied over the conducting water blocking layer with a minimum diameter of 0.5mm. And over the copper wires, copper tape with minimum thickness of 0.1mm is applied helically with overlap. Total cross section of metallic screen layer is shown in table 2. The screen can withstand of fault current to earth of 1000 A for one second at maximum temperature of 160°C. Minimum cross section of concentric conductor is according to DIN VDE 0273 & 0276 as shown.
Table 2. Minimum Total Cross Section of Metallic Screen

Nominal Cross-Section Area Of Cable

Minimum Cross-Section of Metallic Screen

DC Resistance of the Copper Wire Screen

mm²

mm²

mm

Up to 120

16

1.06

150-300

25

0.72

400-630

35

0.51

800-1000

50

0.35

Separator / Water Blocking Layer: The metallic screen may be covered by non-conducting water blocking tape which will swell up under the influence of moisture of water to ensure longitudinal watertightness.
Separation Sheath (for armoured cable): The separation sheath comprises a layer of extruded PVC, PE or LSZH, applied under the armour. Thickness of separation sheath is shown in table 3.
Table 3. Separation Sheath Thickness

Cores Diameter

Approx.Thickess of Inner Sheath

mm

mm

>

<


35

45

1.4

45

60

1.6

60

80

1.8

80

-

2.0

Armour(for armoured cable): The armour consists of:
1) Double layers of galvanized steel tape are applied helically with proper inner overlapping over an extruded separation sheath. Thickness of the steel tape is shown in table 4.
Tabel 4. Galvanized Steel Tape Thickness

Inner Diameter

Thickness of Galvanized Steel Tape

mm

mm

>

<


-

30

0.2

30

70

0.5

70

-

0.8

2) Galvanized flat steel wires with thickness of 0.8 mm are applied helically over the surface of inner sheath with minimum of 90% coverage. And galvanized Steel tape with nominal thickness of 0.3 mm is applied helically with 50% coverage to cover the surface of the flat wires.

Outer Sheath: Overall sheath comprises a layer of extruded PE compound DMP2 according to HD620.1 and 2YM3 type to DIN VDE 0276 Part 3, or PVC compound DMV6 according to HD620.1 and YM5 to DIN VDE 0276 Part 6. Normal wall thickness is 2.5mm (1/500mm
18/30sq 2.6mm), suitable for exposure to sun-light or other local atmospheric environments and for the operating temperature of the cable.

PHYSICAL PROPERTIES:
Operating Temperature: up to 90°C
Temperature Range: -5°C ( PVC sheath ); -20°C ( PE sheath )
Short Circuit Temperature: 250°C (short circuit duration up to 5 seconds)
Bending Radius: 15 x OD (Cable without metal sheath)
30 x OD (Cable with aluminium sheath)
Table 5. Nominal /Operating /Testing Voltages

Nominal Voltage Uo/U

Operating Voltage (Um)

Testing Voltage

3.6/6KV

8KV

12.5KV

6/10KV

12KV

21KV

8.7/15KV

18KV

30.5KV

12/20KV

24KV

42KV

18/30KV

36KV

63KV

Medium   Voltage Cables to VDE 0276

TYPE CODES:
Conductor
N          According to VDE Standard (No abbreviation for copper conductor) A   Aluminium conductor
Copper conductor

Insulation
2X        XLPE

Screen
C         Concentric conductor of copper
CE        Concentric conductor of copper over each individual core
S         Screen of copper wires & copper tapehelically wound
SE        Screen of copper wires over each individual cores
(G)       Longitudinally waterproof

Armour
F          Armour of galvanized flat steel wire
G         Counter Helix of galvanized steel tape
B          Steel tape armouring
R         Armour of galvanized round steel wire

Sheath
2Y         PE
Y           PVC H            LSZH
K          Lead sheath
KL        Aluminium sheath

Three Core   3.6/6KV (Um=7.2KV)
N2XSEY
NA2XSEY
Dimensional Data

Nom. Cross- Section Area

Approx. Conductor Diameter

Nom. Insulation Thickness

Copper Tape Thickness

Copper Wire Screen Area*

Approx. Insulation Diameter

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

Cu

Al

mm²

mm

mm

mm

mm²

mm

mm

mm

kg / km

kg / km

25

6.05

2.5

0.1

16

12.5

1.5

37

2100

1600

35

7.10

2.5

0.1

16

13.5

1.6

39

2500

1800

50

8.25

2.5

0.1

16

14.7

1.6

42

3000

2100

70

9.90

2.5

0.1

16

16.3

1.7

46

3800

2500

95

11.7

2.5

0.1

16

18.1

1.7

50

4800

3000

120

13.1

2.5

0.1

16

19.5

1.8

53

5800

3500

150

14.3

2.5

0.1

25

20.7

1.8

56

6700

3900

185

16.3

2.5

0.1

25

22.7

1.9

60

8100

4600

240

18.7

2.6

0.1

25

25.3

1.9

66

10200

5600

300

20.9

2.8

0.1

25

27.9

2.0

72

12500

6700

400

23.7

3.0

0.1

35

31.1

2.1

80

15600

8200

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as standard.

Three Core 3.6/6KV (Um=7.2KV) Galvanized Steel Tape Armoured Cables
N2XSEYBY NA2XSEYBY Dimensional Data

Nom. Cross- Section Area

Approx. Conductor Diameter

Nom. Insulation Thickness

Copper Tape Thickness

Copper Wire Screen Area*

Approx. Insulation Diameter

Nom. Armour Thickness

Nom. Sheath Thickness

Approx. Overall Diameter

Approx. Weight

Cu

Al

mm²

mm

mm

mm

mm²

mm

mm

mm

mm

kg / km

kg / km

25

6.05

2.5

0.1

16

12.5

0.5

2.2

39

2800

2300

35

7.10

2.5

0.1

16

13.5

0.5

2.3

42

3200

2600

50

8.25

2.5

0.1

16

14.7

0.5

2.4

45

3800

2900

70

9.90

2.5

0.1

16

16.3

0.5

2.5

49

4700

3400

95

11.7

2.5

0.1

16

18.1

0.5

2.6

53

5800

4000

120

13.1

2.5

0.1

16

19.5

0.5

2.7

56

6800

4600

150

14.3

2.5

0.1

25

20.7

0.5

2.8

59

7900

5100

185

16.3

2.5

0.1

25

22.7

0.8

2.9

64

9400

5900

240

18.7

2.6

0.1

25

25.3

0.8

3.1

70

11700

7000

300

20.9

2.8

0.1

25

27.9

0.8

3.3

76

14100

8300

400

23.7

3.0

0.1

35

31.1

0.8

3.6

85

18300

10900

*Optional wire screen can be provided in combination of copper tapes. Nominal screen area, as stated in the table, can be supplied as standard.


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