Why cable type testing is essential

In this paper the results of 20 years of type testing MV, HV and EHV cables, accessories and cable systems are presented. This survey is an update of a previous publication [1] and confirms the previously presented data. It shows that still 20 % to 50 % of all type tests on accessories result in a change in design or it results in stopping the type test. These results show the manufacturer the necessity of thoroughly testing new designs of cables and accessories. For the user of cable systems, these results indicate the value of purchasing type tested components or even systems. Interfacial problems show the importance of testing the combination of cable and accessories that will be used. Individually type tested components are not a guarantee that the combination will pass the type test. Especially for large cable projects, it is advisable to type test the desired combination of cable and accessories before installation commences.