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日期:2019-09-01 人气 次

电缆敷设时的环境温度应不小于0℃,低于0℃时电缆应进行预热。分两种情况:聚氯乙烯电力电缆绝缘的电缆导体的最高额定温度为70℃;短路时最长持续时间不得超过5min,电缆导体的最高温度可达160℃。交联聚乙烯绝缘的电缆导体最高允许工作温度为90℃;应急超载工作温度为130℃;短路时(5S)导体最高温度为250℃。lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
The ambient temperature of cable laying should not be less than 0 C, and the cable should be preheated when it is lower than 0 C. There are two situations: the highest rated temperature of PVC insulated cable conductor is 70 C; the longest duration of short circuit should not exceed 5 min, and the highest temperature of cable conductor can reach 160 C. The maximum allowable working temperature of XLPE insulated cable conductor is 90 C, emergency overload working temperature is 130 C, and the maximum temperature of 5S conductor is 250 C when short circuit occurs.lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
2.3.4弯曲时半径应为:单芯电缆的20(D+dlFO牛牛午夜精品资源大全电缆集团公司
2.3.6额定电压3.6/6~26/35kv叠绕包的软铜带 kV PVC insulated cable should have phase separation or general cladding metal layer, but no conductor and insulation shielding layer. The core is tightlare three shielding modes: metal band wrapping shielding, metal wire weaving shielding, metal wire shielding, metal strip sparsely wound cross-linked cable should have conductor shielding, insulation shielding and phase separation metal layer.组成,也可采用双层铜带间隙绕包,铜带间的搭盖或PVC绝缘电缆,3.6/6kv PVC绝缘电缆均应具有分相或统包金属层,但无导体和绝缘屏蔽层。芯紧密结合,金属屏蔽应由一根或多根金属带或金属丝编织或金属丝的同心绞合层或金属丝和金属带的y bonded, and the metal shield shall consist of one or more metal strips or concentric layers woven by metal wires or a combination of metal wires and metal strips. In fact, there 组合结构组成。(实际上有三种屏蔽方式,金属带绕包屏蔽,金属丝编织屏蔽,金属丝屏蔽金属带疏绕的交联电缆应具有导体屏蔽、牛牛午夜精品资源大全绝缘屏蔽和分相金属层。lFO牛牛午夜精品资源大全电缆集团公司
2.3.7导体屏蔽应是非金属的,由挤包的半导电料或.3.4 When bending, the radius should be 20(D+d) of single-core cable.lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
2.3.6 rated voltage 3.6/6~26/35 kV laminated wrapped soft copper band composition, can also be used double-layer copper band gap wrapped, copper band between the lap or PVC insulated cable, 3.6/6lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
2.3.7 Conductor shielding shall be non-metallic,lFO牛牛午夜精品资源大全电缆集团公司
With insulating wire) + 5% (single cothan 4 mm.lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
2.3.9 Copper Strip Shielded by a Heavy Layer)在导体上先包半导电带再挤包半导电料组成,挤包的半导电料应与绝缘紧密结合;绝缘屏蔽应由非金属半导电层与金属层组合而成,非金属半导电丝屏蔽由疏绕的率re cable is not less than 16 times of cable outer diameter); multi-core cable is 15% (D + d) + 5% (multi-core cable is not less than 12 times of cable outer diameter).lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
Among them, the actual outer diameter of D-cable d-conductor should not be less than 15% (nominal value), the minimum coverage rate should not be less than 5%. The nominal thickness of copper strip should be selected as required: single-core cable (>0.12mm); three-core cable (>0.10mm), and the minimum thickness of copper strip should not be less than 90% of nominal value.lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
2.3.5 rated voltage 1.8/3 kV cross-linked soft copper wire is composed. Its surface is tightened by reverse wrapped copper wire or copper strip. The average gap between adjacent copper wires should be no more lFO牛牛午夜精品资源大全电缆集团公司
2.3.10标称截面500mm2及以上电缆金属屏蔽应采用铜丝屏蔽结构。lFO牛牛午夜精品资源大全电缆集团公司
与绝缘线)±5%(单芯电缆不小于电缆外径的16倍);多芯电缆的15(D+d)±5% (多芯电缆不小于电缆外径的12倍)。lFO牛牛午夜精品资源大全电缆集团公司
其中D—电缆实际外径 d—导体实际外径;应不小于15%(标称值),其最小搭盖率应不小于5%,铜带的标称厚度应按要求选用:单芯电缆≥0.12mm;三芯电缆≥0.10mm,铜带的最小厚度应不小于标称值的90%。 consilFO牛牛午夜精品资源大全电缆集团公司
2.3.10 The metal shielding of cables with nominal cross-section of 500 mm2 or more should adopt copper wire shielding structure.lFO牛牛午夜精品资源大全电缆集团公司
lFO牛牛午夜精品资源大全电缆集团公司
2.3.5额定电压1.8/3kv交联软铜线组成,其表面应用反sting of extruded semi-conductive material or semi-conductive material wrapped with semi-conductive tape and then extruded on conductor. The extruded semi-conductive material shall be tightly combined with insulation. Insulation shielding shall be composed of non-metallic semi-conductive layer and metal layer, and non-metallic semi-conductive wire shielding shall be made of sparse winding rate.lFO牛牛午夜精品资源大全电缆集团公司
向绕包的铜丝或铜带扎紧,相邻铜丝的平均间隙应不大于4mm。lFO牛牛午夜精品资源大全电缆集团公司
2.3.9铜带屏蔽由一层重)lFO牛牛午夜精品资源大全电缆集团公司
 

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