电缆结构示意图 IIIustration of cable structure

使用特性 Service characteristics  

电缆导体的Zui高额定温度
Electric cable conductor Max. rated temperature XLPE绝缘90℃， PVC绝缘70℃
XLPE insulation90℃ PVC insulation70℃ 电缆敷设时的环境温度
Cable laying environment temperature ≥0℃ 短路时电缆导体的Zui高温度(持续时间≤5S)
Short circuit electric cable conductor max. temperature XLPE绝缘≤250℃， PVC绝缘≤160℃
XLPE insulation≤250℃PVC insulation≤160℃ 电缆的Zui小弯曲半径
Minimun bending radius 为电缆弯曲试验用圆柱直径的2倍
Uses the column diameter for the electric cable bend test 2 times

电缆主要技术性能 Major technical performances

1、 电缆导体直流电阻及绝缘电阻 Cable conductor DC resistance and insulated resistance

型 号
Model 标称截面 (mm2)
nominal sectional +20℃导体直流电阻(≤Ω/Km)
DC resistance of the conductor at 20℃ +20℃绝缘电阻常数(≥MΩ.Km)
Insulation resistance at 20℃ MVV MVV22
MVV32 MYJV
MYV22 MYJV32
MYJV42 1.5 12.1 36.7 2.5 7.41 4 4.62 6 3.08 10 1.83 16 1.15 25 0.727 35 0.524 50 0.387 70 0.268 95 0.193 120 0.153 150 0.124 185 0.991

2、电缆其它主要技术性能 Other major technical performances

(型号Model:MKVV22、MKVV32、MKVV42、MKVV、MKVVR、MKVVP、MKVVP2、MKVVRP)

序 号
Serial number 项目 Items 技术性能 Technical performances 1 +20℃时导体直流电阻(≤Ω/Km)
Conductor DC resistance at 20℃ 见上表 See above table 2 +20℃时绝缘电阻的常数(≥MΩ·Km)
Insulation resistance at 20℃ 见上表 See above table 3 5min工频交流电压试验
5min power frequency alternating current pressure test 芯-芯 Core-Core
芯-铠装 Core-Armor 3500V不击穿 3500V no breakdown 4 4h交流高压试验
4h AC high voltage test 2400V不击穿 2400V no breakdown 5 单根垂直燃烧试验
Single wire burning test MT386 6 成束燃烧试验
Group burning test 符合GB/T18380.3标准中B类成束燃烧试验要求
Conforms to GB/T18380.3 standard B kind group burning test