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35KV and below cross-linked polyethylene insulated power cable

Detail

Application

This product is suitable for the ac rated voltage of 35kV and below lines, power supply, transmission and distribution energy use. It is commonly used in urban underground power grid, power station lead lines, internal power supply of industrial and mining enterprises and underwater transmission lines across the river and sea.

Standard

This product performs GB / T12706, Rated voltage 1kV(Um=1.2kV) to 35kV(Um=40.5kV) extruded insulated power cable, GB / T12706.2 Part 2: Rated voltage 6kV(Um=7.2kV) to 30kV (Um = 36kV) GB / T12706.3 Part 3: Rated voltage 35kV(Um=40.5kV).

Characteristics

1. The allowable long-term working temperature of the cable conductor is:

Maximum temperature of conductor of various insulated mixture cables (GB / T12706.2 Part 2)

Insulation mixture

Maximum conductor temperature of ℃

normal operation

Short circuit (max. duration 5S)

Polyvinyl chloride (PVC / A)

The conductor cross-sectional area is 300mm2

Conductor cross-sectional area was> 300mm2

Crosslinked polyethylene (XLPE)

70

70

90

160

140

250

Maximum conductor temperature of XLPE insulated mixture cable (GB / T12706.3 Part III)

Insulation mixture

Maximum conductor temperature of ℃

normal operation

Short circuit (max. duration 5S)

Crosslinked polyethylene (XLPE)

90

250

2. The ambient temperature during the cable laying shall not be lower than 0℃;

3. Minimum allowable bending radius during cable laying:

project

single conductor cable

bank cable

Minimum bending radius of the cable during installation

No armor

There is armor

No armor

There is armor

20D

15D

15D

12D

Note: D is the cable outer diameter

4. Rated voltage

5. The rated voltage of U0 / U of GB / T12706.2) is 3.6/6(7.2)kV, 6/6(7.2)kV, 6/10(12)kV, 8.7/10(12)kV, 8.7/15 (17.5) kV, 12 / 20 (24) kV and 18 / 30 (36) kV.

6. GB / T12706.3 Part III: The cable power frequency rated voltage U0 / U (Um) is 21 / 35 (40.5) kV and 26 / 35 (40.5) kV.

7. U0: the rated power frequency voltage between the conductor to the ground or to the metal shield used for the cable design;

8. U: Rated power frequency voltage between the conductors used for cable design;

9. Um: maximum of "maximum system voltage" that the device can withstand.

Testing

Rated voltage: U0 (kV)

6

8.7

12

21

26

Test voltage: U (kV)

21

30.5

42

73.5

91

Duration (min)

5

5

5

5

5

Local discharge shall be specified by GB/T3048.12-2007. When voltage is 1.73 U0, no local discharge and no breakdown in 5min voltage test.

The performance of the flame-retardant and halogen-free low-smoke cable complies with the provisions of GB / T19666-2019 and GB / T18380-2008.

Cable Models

model

name

Copper core

Aluminum core

YJV

YJY

YJV22

YJV23

YJV32

YJV33

YJLV

YJLY

YJLV22

YJLV23

YJLV32

YJLV33

Crosslinked polyethylene insulated PVC sheathed power cable

Crosslinked polyethylene insulated polyethylene or polyolefin sheathed power cables

Crosslinked polyethylene insulated steel strip armoured PVC sheathed power cable

Crosslinked polyethylene insulated steel strip armoured with polyethylene or polyolefin sheathed power cables

Crosslinked polyethylene insulated fine round steel wire armoured with PVC sheathed power cable

Crosslinked polyethylene insulated fine circular steel wire armored with polyethylene or polyolefin sheathed power cables

The model in the table does not contain the flame retardant characteristics

The performance of the flame-retardant and halogen-free low-smoke cable complies with the provisions of GB / T19666-2019 and GB / T18380-2008.

Cable structure and physical pictures