IEC 61238-1-3:20 18适用于额定电压高于1 kV(Um=1,2 kV)至30 kV(Um=36 kV)的电力电缆的压缩和机械连接器，例如埋地电缆或安装在建筑物中的电缆，具有 a)符合IEC 60228的导体，铜的标称横截面积在2.5 mm2和1200 mm2之间，铝的标称横截面积在16 mm2和1200 mm2之间，不包括美利肯导体； b)最高连续导体温度不超过90℃。 本文件不适用于架空线路导线连接器，也不适用于带滑动触点的连接器。 本文件的目的是定义适用于铜或铝导体电力电缆的压缩和机械连接器的型式试验方法和要求。参考方法是在未使用的导体上进行测试。第一版与IEC 61238-1-1和IEC 61238-1-2一起取消并取代了IEC 61238-1:20 03。 本版本包括以下与IEC 61238--1:20 03相关的重大技术变更: a)范围已扩大到涵盖从10 mm2到2.5 mm2的导体的连接器，并且对于铜和铝导体的连接器已限制为1 200 mm2，因为对于较大横截面积的导体，测试经验和应用很少。 b)引入了一个新的机械类别，以满足对连接器的要求，该连接器承受的机械力高于1类中规定的用于较大横截面积的导体的机械力。 c)对于电气测试，已经设置了最大升高的加热电流，以避免在测试期间可能改变被测连接器特性的不切实际的电流密度。d)对于短路试验，更新了计算方法和要求。 e)对于机械试验，更新了方法和要求。 f)介绍了对可分离连接器中应用的电缆端子接线片进行电气测试的建议。

IEC 61238-1-3:2018 applies to compression and mechanical connectors for power cables for rated voltages above 1 kV (U_m = 1,2 kV) up to 30 kV (U_m = 36 kV), for example buried cables or cables installed in buildings, having
a) conductors complying with IEC 60228 having nominal cross-sectional areas between 2,5 mm² and 1 200 mm² for copper and between 16 mm² and 1 200 mm² for aluminium, excluding Milliken conductors;
b) a maximum continuous conductor temperature not exceeding 90 °C.
This document is not applicable to connectors for overhead line conductors nor to connectors with a sliding contact.
The object of this document is to define the type test methods and requirements which apply to compression and mechanical connectors for power cables with copper or aluminium conductors. The reference method is to perform the tests on unused conductors.
This first edition, together with IEC 61238-1-1 and IEC 61238-1-2, cancels and replaces IEC 61238-1:2003.
This edition includes the following significant technical changes with respect to IEC 61238--1:2003:
a) The scope has been widened to cover connectors for conductors from 10 mm² down to 2,5 mm² and has been limited to 1 200 mm² for connectors for copper and aluminium conductors because test experience and applications are rare for conductors of larger cross-sectional areas.
b) A new mechanical class has been introduced to satisfy the demand for connectors subjected to higher mechanical forces than those specified in Class 1 for conductors of larger cross-sectional areas.
c) For the electrical test, a maximum elevated heating current has been set in order to avoid unrealistic current densities during the test which may change the properties of tested connectors.
d) For the short-circuit test, the method of calculation and requirements have been updated.
e) For the mechanical test, the methods and requirements have been updated.
f) A proposal for an electrical test on cable terminal lugs for application in separable connectors has been introduced.