Dynamic measurements during short-circuit testing of transformers part II: Test results and analysis

Some of the test results measured during short circuit tests on a full size, 19.5 MVA, three phase, three winding, oil filled, power transformer are reported and analyzed in this paper. Included are radial flux measurements to obtain accurate calculated electromagnetic forces, the effects of tap configuration and clamping force on the dynamic forces transmitted to various parts of the transformer structure, comparison of the measured results with computer predicted results, the circumferential force variation at the top of the winding, the forces experienced by the tie plates, and the failure detection results.