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    It is used for supervising and controlling return circuit of rated voltage 450/750V or lower with demand on low smoke, low halogen and flame retardance.
    Executive standard:
    Enterprise standard and GB 9330 – 88 standard for reference
    Working Condition
    1: Rated voltage: 450/750V
    2: Long-term working temperature allowed by cable is 70鈩?
    3: Ambient temperature for installing cable shall be no lower than 0鈩?
    Recommended bending radius:
    It shall be no less than 12 times that of cable O.D for armored cable with copper tape shielding structure and 6 times that of cable O.D for cable with other structure.
    Type and Description
    1 Type and Description
    TypeDescription
    DDZ -KVVControl cable with Cu core, low smoke & halogen, flame retardant, PVC insulation and sheath
    DDZ -KVVPControl cable with Cu core, low smoke & halogen, flame retardant, PVC insulation and sheath, copper wire
    braided shielding
    DDZ -KVVRControl soft cable with Cu core, low smoke & halogen, flame retardant, PVC insulation and sheath
    DDZ -KVVRPControl soft cable with Cu core, low smoke & halogen, flame retardant, PVC insulation and sheath, copper
    wire braided shielding
    DDZ -KVVP2Control cable with Cu core, low smoke & halogen, flame retardant, PVC insulation and sheath, copper
    tape wrapped shielding
    DDZ -KVVP22Control cable with Cu core, low smoke & halogen, flame retardant, PVC insulation and sheath, steel tape
    armor
    DDZ -KVVP32Control cable with Cu core, low smoke & halogen, flame retardant, PVC insulation and sheath, steel wire
    armor
    Remark: 鈥楧DZ鈥?means low smoke & halogen, flame retardant
    2 Explanation of Main Noun Term
    Low smoke: under stipulated testing conditions, smoke out of decomposition with heat or emission in firing is less, which conforms to stipulated indices.
    Low halogen: under stipulated testing conditions, HCI content of smoke emitted in firing is less which conforms to stipulated indices.
    Flame retardant: under stipulated testing conditions, the tested sample is fired. After removing from source, flame spreads within stimulated range, remnant flame will go out on itself within stipulated time.
    Specification Scope
    TypeRated
    voltage
    VNominal cross section area of conductor mm2
    0.50.751.01.52.54610
    core no.
    DDZ-KVV 銆丏DZ-KVVP
    450/7502~612~37
    2~14
    DDZ-KVVP2銆?DDZ-KVVP22 DDZ-KVVP324~612~37
    DDZ-KVVR銆丏DZ-KVVRP2~612~37
    Main Technical Indices
    Performance indices of low smoke & halogen and flame retardance Smoke density test: min. light-penetration ratio is 鈮?0%.
    Hcl emission value shall be no more than 100mg/g.
    Conductor DC resistance value & voltage withstand stress at 20鈩?/p>Nominal cross section area
    (mm2)Conductor structure
    Pieces/diameter
    (mm)Conductor DC resistance at 20鈩?(惟/km)Voltage withstand stress
    Non tinned
    tinned
    0.51/0.836.036.73kV/5min. Insulation without puncture
    7/0.3036.036.7
    16/0.2039.040.1
    0.751/0.9724.524.8
    7/0.3724.524.8
    24/0.2026.026.7
    1.01/1.1318.118.2
    7/0.4318.118.2
    32/0.2019.520.0
    1.51/1.3812.112.2
    7/0.5212.112.2
    30/0.2513.313.7
    2.51/1.787.417.56
    7/0.687.417.56
    49/0.267.988.21
    41/2.254.614.70
    7/0.854.614.70
    56/0.304.955.09
    61/2.763.083.11
    7/1.043.083.11
    84/0.303.303.39
    107/1.351.831.84
    3 External Dimension of Cable Please refer to control cable with PVC insulation and sheath
    Delivery length
    Delivery length of cable depends on both agreements with length error allowance of 卤0.5%China Special Cable
    website:http://www.chinaxintongcable.com/special-cable/