STATIC INDUCTION EQUIPMENT

PROBLEM TO BE SOLVED: To protect a static induction equipment against dielectric failures caused by flow charge by a method, wherein a porous low-charge member is provided to the surface of an insulating member where insulating liquid flows. SOLUTION: Flow changing rings 35 to 38 which enable insula...

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Bibliographic Details
Main Authors KOJIMA KEIMEI, MIYAO HIROSHI, FURUKAWA SADAO
Format Patent
LanguageEnglish
Published 22.01.1999
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INDUCTANCES
MAGNETS
NATURALLY-OCCURRING ELECTRICITY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
STATIC ELECTRICITY
TRANSFORMERS
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Summary:PROBLEM TO BE SOLVED: To protect a static induction equipment against dielectric failures caused by flow charge by a method, wherein a porous low-charge member is provided to the surface of an insulating member where insulating liquid flows. SOLUTION: Flow changing rings 35 to 38 which enable insulating oil 7 flowing through a vertical cooling path 100B to flow through a horizontal fooling path 100A are provided to the inner circumferential surfaces of an insulating cylinder on a core 1 side and another insulating cylinder on a tank side respectively. Porous fluororesin layers 104, 111, and 112 of porous low- charge member are provided to the surfaces of insulating members near the inlets and outlets of the flow-changing rings 35 to 38 and provided to the inner circumference of an intermediate cooling hole as indicated by circles. The porous fluororesin layer is formed through such a manner that polytetrafluoroethylene(PTFE) films are pasted together. A PTFE pipe is of resistivity 10 (Ω.cm) in a current density range of 1 to 10 (pA/cm ).
Bibliography:Application Number: JP19970162350