Abstract

This Uganda Standard identifies the requirements for power transformers to sustain without damage the effects of overcurrent originated by external short circuits. It describes the calculation procedures used to demonstrate the thermal ability of a power transformer to withstand such over currents and both the special test and the theoretical evaluation method used to demonstrate the ability to withstand the relevant dynamic effects. The requirements apply to transformers as defined in the scope of IEC 60076-1. (This Uganda Standard cancels and replaces US EAS 371-5:2005, Specification for power transformers - Part 5: Ability to withstand short circuit, which has been technically revised). This standard was PUBLISHED on 2016-06-28