CONDUCTION AND BREAKDOWN IN LIQUID DIELECTRICS

Conduction and Breakdown in Commercial Liquids

Conduction and Breakdown in Commercial Liquids: As already mentioned, Conduction and Breakdown in Commercial Liquids are not chemically pure and have impurities like gas bubbles, suspended particles, etc. These impurities reduce the breakdown strength of these liquids considerably. The breakdown mechanisms are also considerably influenced by the presence of these impurities. In addition, when breakdown […]

Conduction and Breakdown in Pure Liquids

Conduction and Breakdown in Pure Liquids: When low electric fields less than 1 kV/cm are applied, conductivities of 10-18-10-20 mho/cm are obtained. Conduction and Breakdown in Pure Liquids are probably due to the impurities remaining after purification. However, when the fields are high (> 100 kV/cm) the currents not only increase rapidly, but also undergo […]

Characteristics of Liquid Dielectrics

Characteristics of Liquid Dielectrics: Essential Characteristics of Liquid Dielectrics should possess good dielectric properties, excellent heat transfer characteristics and must be chemically stable under the range of conditions under which the equipment operates. These are briefly discussed below. (a) Electrical Properties The electrical properties that are essential in determining the dielectric performance of a Characteristics of […]

Classification of Liquid Dielectrics

Classification of Liquid Dielectrics: In recent years, a substitute to mineral oils, other polyester oils have been developed which are extensively used in transformers in Europe and other countries. One such oil is the halogen free Penta-Etythrite-Tetra Fatty Acid. Polyester oil (PETFP oil) which has very good electrical, physical and thermal properties. It is also biodegradable, i.e. […]

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