The development of coil short circuits when transformer windings become contaminated with metal-containing colloidal particles
- 'Presselektro' Ltd. (Russian Federation)
- JSC 'R and D Center for Power Engineering' (Russian Federation)
- Russian Academy of Sciences, A. N. Frumkin Institute of Physical Chemistry and Electrochemistry (Russian Federation)
The radiational-thermal development of coil short circuits due to the action of partial discharges of the first kind when the windings of transformers, autotransformers and shunting reactors become contaminated with metal-containing colloidal particles, formed in the transformer oil as a result of the interaction of the oil with the constructional materials (the copper of the windings, the iron of the tank, the core etc.) is considered. Acriterion of dangerous contamination of the coil insulation of the windings by metal-containing colloidal particles is proposed, namely, 3% of the mass content of copper and iron in it, which, if exceeded, may serve as a basis for recognizing the state of transformers, autotransformers and shunting reactors at a voltage of 110 kV and above the limit. It is shown that filters for continuously cleaning the oil play a considerable role in prolonging the life of transformer equipment.
- OSTI ID:
- 22063940
- Journal Information:
- Power Technology and Engineering (Print), Vol. 45, Issue 5; Other Information: Copyright (c) 2012 Springer Science+Business Media, Inc.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1570-145X
- Country of Publication:
- United States
- Language:
- English
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