GSO IEC 60865-1:2015由GSO 发布于 2015-09-03。
GSO IEC 60865-1:2015在国际标准分类中归属于: 17.220.01 电学、磁学综合。
GSO IEC 60865-1:2015 短路电流影响的计算 第1部分:定义和计算方法的最新版本是哪一版?
最新版本是 GSO IEC 60865-1:2015 。
This part of IEC 60865 is applicable to the mechanical and thermal effects of short-circuit currents. It contains procedures for the calculation of – the electromagnetic effect on rigid conductors and flexible conductors, – the thermal effect on bare conductors. For cables and insulated conductors, reference is made, for example, to IEC 60949 and IEC 60986. For the electromagnetic and thermal effects in d.c. auxiliary installations of power plants and substations reference is made to IEC 61660-2. Only a.c. systems are dealt with in this standard. The following points should, in particular, be noted: a) The calculation of short-circuit currents should be based on IEC 60909. For the determination of the greatest possible short-circuit current, additional information from other IEC standards may be referred to, e.g. details about the underlying circuitry of the calculation or details about current-limiting devices, if this leads to a reduction of the mechanical stress. b) Short-circuit duration used in this standard depends on the protection concept and should be considered in that sense. c) These standardized procedures are adjusted to practical requirements and contain simplifications which are conservative. Testing or more detailed methods of calculation or both may be used. d) In Clause 5 of this standard, for arrangements with rigid conductors, only the stresses caused by short-circuit currents are calculated. Furthermore, other stresses can exist, e.g. caused by dead-load, wind, ice, operating forces or earthquakes. The combination of these loads with the short-circuit loading should be part of an agreement and/or be given by standards, e.g. erection-codes. The tensile forces in arrangements with flexible conductors include the effects of deadload. With respect to the combination of other loads the considerations given above are valid. e) The calculated loads are design loads and should be used as exceptional loads without any additional partial safety factor according to installation codes of, for example, IEC 61936-1 [1]1.
在地面上任何地方都不能排除大气 吸收对太阳辐射的影响,因此引入大气质量(air mass,AM)的概念。 可以看出,太阳当顶时海平面处为AM1 ;外层空间不通过大气的情况为AM0 ;通常接近人类生活现实的太阳高度角41.8°的情况为AM1.5。太阳常数为AM0 条件下的太阳辐射通量,AM0 光谱主要用于评估太空用的光伏电池和组件性能。...
3.短路电流密度Jsc太阳电池单位面积输出的短路电流,就是短路电流密度。 理论计算得出的Jsc 与实测的Jsc 可能存在差异,产生差异的主要原因是实测时所用的太阳光模拟器光谱辐射曲线与AM1.5G 标准太阳光谱辐射曲线存在差异。4.峰值功率 Pm太阳电池片在正常工作或测试条件下的最大输出功率,就是峰值功率。峰值功率取决于太阳辐照度、太阳光谱分布和电池片的工作温度等条件。...
通常Uz以额定电压的百分数表示,即uz=(Uz/U1n)*100%。 变压器的短路阻抗在运行中的作用: 当变压器满载运行时,短路阻抗的高低对二次侧输出电压的高低有一定的影响,短路阻抗小,电压降小,短路阻抗大,电压降大。 当变压器负载出现短路时,短路阻抗小,短路电流大,变压器承受的电动力大。短路阻抗大,短路电流小,变压器承受的电动力小。 ...
5.电路的断路与短路电路的断路处:I=0,U≠0 电路的短路处:U=0,I≠0 。基尔霍夫定律 :1.几个概念:支路:是电路的一个分支。结点:三条(或三条以上)支路的联接点称为结点。回路:由支路构成的闭合路径称为回路。网孔:电路中无其他支路穿过的回路称为网孔。2.基尔霍夫电流定律:(1)定义:任一时刻,流入一个结点的电流的代数和为零。或者说:流入的电流等于流出的电流。...
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