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As the increasing demand for large capacity, high voltage and high reliability power transformers in urban power grid, oil-free, non-flammable and non-explosive equipment is recommended. For this reason, evaporative cooling transformers, gas insulated transformers and other electrical equipment using fluorocarbon as coolant and dielectric have been developed. This paper presents an experimental survey...
Thermal stress is one of the major causes of deterioration of insulation material for power transformers. An efficient cooling system is important to keep the operating temperature at lower levels. In shell-form transformers, the insulation structure plays an important role in not only insulation but also cooling efficiency. It is known that insulation of shell-form transformers is barrier insulation,...
Although the amorphous alloy core power transformers have the advantage of lower core loss, the high noise level and weak short-circuit strength are inevitable. To explore the countermeasures for noise decreasing, an amorphous alloy core model was employed for detailed experimental study. A large number of noise measurements (A-weighted sound pressure level) were implemented by changing magnetic flux...
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