SYSTEM FOR PROTETION OF DRY TYPE TRANSFORMERS

A system for transient over voltage protection of a three-phase transformer. Two surge arresters are series connected across each winding of the transformer and the center point connection of the two surge arresters is electrically connected to a middle location of the winding. Three additional surg...

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Bibliographic Details
Main Authors LILJESTRAND, Lars, LINDELL, Elisabeth, GREUTER, Felix
Format Patent
LanguageEnglish
French
German
Published 24.04.2024
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:A system for transient over voltage protection of a three-phase transformer. Two surge arresters are series connected across each winding of the transformer and the center point connection of the two surge arresters is electrically connected to a middle location of the winding. Three additional surge arresters are electrically connected from each phase to ground in a Y connected transformer; and/or connected from a neutral point to ground. The system allows for all of the surge arresters to be packaged as an integrated surge arrester system to minimize induced transient over voltages and high stresses on the transformer winding due to internal resonances.
Bibliography:Application Number: EP20150797328