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YJV22 6/6kV 3 × 70

This product is suitable for AC rated voltage 35kV and below lines for transmission and distribution of energy. Commonly used in urban underground power grids, power station leads, industrial and mining enterprises internal power supply and underwater transmission lines across the river and sea.

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Medium Voltage Power Cable

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  • Product Description
    • Commodity name: YJV22 6/6kV 3 × 70

    This product is suitable for AC rated voltage 35kV and below lines for transmission and distribution of energy. Commonly used in urban underground power grids, power station leads, industrial and mining enterprises internal power supply and underwater transmission lines across the river and sea.

    Scope of application
    This product is suitable for AC rated voltage 35kV and below lines for transmission and distribution of energy. Commonly used in urban underground power grids, power station leads, industrial and mining enterprises internal power supply and underwater transmission lines across the river and sea.

    Executive standard
    This product implements GB/T12706 "Extruded Insulated Power Cable with Rated Voltage of 1kV(Um = 1.2kV) to 35kV(Um = 40.5kV)", GB/T12706.2 Part II: Rated Voltage of 6kV(Um = 7.2kV) to 30kV(Um = 36kV)GB/T12706.3 Part III: Rated Voltage of 35kV(Um = 40.5kV).

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

    Maximum Conductor Temperature of Various Insulation Mixture Cables (GB/T12706.2 Part 2)

    insulating mixture

    Maximum conductor temperature ℃

    Normal operation

    Short circuit (maximum duration 5S)

    Polyvinyl chloride (PVC/A)
    Conductor cross-sectional area ≤ 300mm2
    Conductor cross-sectional area> 300mm2
    Cross-linked polyethylene (XLPE)

    70
    70
    90

    160
    140
    250

    Maximum Conductor Temperature of XLPE Cable with Insulation Mixture (GB/T12706.3 Part 3)

    insulating mixture

    Maximum conductor temperature ℃

    Normal operation

    Short circuit (maximum duration 5S)

    Cross-linked polyethylene (XLPE)

    90

    250

    2. The ambient temperature during cable laying shall not be lower than 0 ℃;
    3. Minimum allowable bending radius for cable laying:

    Project

    single core cable

    multi-core cable

    Minimum bending radius of cable at installation

    No Armored

    armored

    No Armored

    armored

    20D

    15D

    15D

    12D

    Note: D is the outer diameter of the cable

    4. Rated voltage
    The power frequency rated voltage U0/U(Um) of GB/T12706.2 Part II cables 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.
    GB/T12706.3 Part III: The power frequency rated voltage U0/U(Um) of the cable is 21/35(40.5)kV and 26/35(40.5)kV.
    U0: Rated power frequency voltage between conductor to ground or metal shield for cable design;
    U: Rated power frequency voltage between conductors for cable design;
    Um: The maximum value of the "maximum system voltage" that the device can withstand.

    routine test

    Rated voltageU0(KV)

    6

    8.7

    12

    18

    21

    26

    Test voltageU(KV)

    21

    30.5

    42

    63

    73.5

    91

    Duration (min)

    5

    5

    5

    5

    5

    5

    Partial discharge shall be in accordance with GB/T3048.12-2007. When the voltage is 1.73 U0, there shall be no partial discharge and no breakdown of insulation during 5min voltage test.
    Flame retardant, halogen-free low smoke cable performance in line with GB/T19666-2019, GB/T18380-2008.

    Common cable model

    Model

    Name

    COPPER CORE

    Aluminum core

    YJV
    YJY
    YJV22
    YJV23
    YJV32
    YJV33

    YJLV
    YJLY
    YJLV22
    YJLV23
    YJLV32
    YJLV33

    XLPE insulated PVC sheathed power cable
    XLPE insulated PE or polyolefin sheathed power cable
    XLPE insulated steel tape armored PVC sheathed power cable
    XLPE insulated steel tape armored PE or polyolefin sheathed power cable
    XLPE insulated fine round steel wire armored PVC sheathed power cable
    XLPE insulated fine round steel wire armored PE or polyolefin sheathed power cable

    Flame retardant characteristics are not included in the model in the table

    Flame retardant, halogen-free low smoke cable performance in line with GB/T19666-2019, GB/T18380-2008.

    Cable structure diagram and pictures

    YJLV 8.7/10kV3×95

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