Short-circuit testsPre-set short circuitInrush currentsPre-magnetizationMagnetic saturationThe post-set and pre-set short-circuit test methods for power transformers are discussed KEMA's testing experience with special attention to the pre-set method, inrush currents and pre-magnetization, are ...
This transformer test is performed to find the parameters of equivalent circuit of transformer and losses of the transformer. Short circuit test on transformer is very economical and convenient because it is performed without actually loading of the transformer. ...
Short Circuit Verification for a 570 MVA, 420 kV single-phase GSU-Transformer by SC-Withstand Tests on a Mock-up Unit Large generator step-up transformers in power generation plants are exposed to several kinds of stresses under service conditions. One kind of stress is ca... G Leber,H Pas...
Transformer LV Short-circuit Impedance Tester applies to LV load impedance test during delivery, overhaul, trial test and handover test of power transformers (single phase or three-phase). It tests the short-circuit impedance (%) of power voltage on site and compares it with the value ...
Short-circuit stresses in transformer windings, demands made on short-circuit strength methods of testing short-circuit strength, equipment required for testing short-circuit withstand capability, tested transformers, and test preparations are discussed. A dynamic short-circuit test and the verification of...
Variations in the input-circuit inductance—namely, equivalent inductance—are usually measured in the process of single-phase testing of three-phase transformers for short-circuit stability using equivalent circuits for damage identification. The problem of recalculation of equivalent inductance to short-ci...
This paper summarizes Bonneville Power Administration's transformer short circuit test experience of three-phase units rated 115-kv Delta to 12.47-kv Wye; reviews BPA's diagnostic and low voltage impulse test results, and correlates them with factory inspection of damaged units. Special emphasis is ...
The Transformer short circuit impedance tester is suitable for low voltage impedance tests of power transformers (single phase or three phase) factory, handover, pre-test and overhaul processes, and also a rapid test instrument to check whether the winding deformation exists in transformer. K...
ZX-BZK Transformer Short-circuit Impedance Tester is to the most direct way to check the deformation of the winding after transformer suffered from short-circuit current or mechanical collision during transportation and installation, the test is important to help determine whether ...
摘要: Some theoretical methods to research short-circuit strength of transformer windings at home and abroad are sum ma rized.Several methods to enhance short-circuit strength of windings are in tro duced.This provides certain references for further research on the problems.关键词:...