below 0℃（VV线与YJV线有什么区别）

• 1、VV线与YJV线有什么区别
• 2、
• 3、below freezing 还是frozen
• 4、Near the North Pole(北极)there are only two seasons：winter and summer．In winter，nights are long．For more than two months you can’t see the sun，even at noon．In summer，days are long．For more than two months the sun neve

1、VV线与YJV线有什么区别

是绝缘材料不同.
VV是聚氯乙烯绝缘聚氯乙烯护套
YJV是交联聚氯乙烯绝缘聚氯乙烯护套
正是因为材料不同,
所以VV与YJV电缆允许长期工作最高温度不同,
VV:电缆导体的允许长期工作最高温度为70℃
YJV:电缆导体允许长期最高工作温度为90℃.
所以两种电缆载流量不同,YJV大一些,
但YJV电缆价格上要比VV贵.
YJV
Y----聚乙烯 J-----交联 V----聚氯乙烯护套 0.6/1kV交联聚乙烯绝缘电力电缆 XLPE Insulated Power Cable 产品标准 standard 本产品按GB12706《额定电压35KV铜芯、铝芯塑料绝缘电力电缆》标准生产,同时还可根据用户需要按国际电工委员会推荐标准IEC、英国标准、德国标准及美国标准生产.The product is manufactured according to the standard of GB12706、IEC.BS,DIN and ICEA upon request.适用范围 Applications 本产品适用于工频额定电压64/1KV及以下配电网或工业装置中固定敷设之用.The product is suitable for use in power distribution lines or fixed installations with rated power- frequency voltage up to and including 0.6/1Kv.使用特性 Operating characteridtles ·工频额定UO/U为0.6/1KV.Rated power –frequency voltage UO/U为0.6/1KV.电缆导体允许长期最高工作温度为90℃.Max.permissible continuous operating temperature of conductor:90℃.短路时（最长持续时间不超过5s）电缆导体的最高温度不超过250℃.Max.short –circuit temperature of conductor shall not exceed 250℃(5s maximum duration ).电缆敷设时环境温度应不低于0℃.The ambient temperature under installation should not below 0℃.电缆弯曲半径：不小于电缆外径的15倍.The bending radius should not less than 15 times of cable diameter
VV
工频额定电压Uo/U为0.6/1KV.Rated power-frequency voltage Uo/U:0.6/1KV.电缆导体的允许长期工作最高温度为70℃ Max.permissible continuous operating temperature of conductor:70℃ 短路时（最长持续时间不超过5s）电缆导体的允许最高温度：导体截面 ≤ 300mm2 – 160℃； 导体截面 300 – 140＞℃； Max.short-circuit temperature of the conductor shall not excssd:(5smaximum duration).Cross-section of conducter ≤ 300mm2 – 160℃； Cross-section of conducter ＞ 300mm2 – 140℃,电缆敷设时环境温度应不低于0℃.The ambient temperature under installation should should not below0℃ 电缆弯曲半径不小于电缆外径10倍.The bending radius of a cable should not be less than 10 times of the cable diameter.电缆的型号 Type of cable

2、

5 degree centigrade below zero

3、below freezing 还是frozen

below freezing 释义：

4、Near the North Pole(北极)there are only two seasons：winter and summer．In winter，nights are long．For more than two months you can’t see the sun，even at noon．In summer，days are long．For more than two months the sun neve

1.D 2.B 3.D 4.C 5.A