초록 ▼

The present invention relates to a high voltage liquid-filled transformer including a housing and a dielectric liquid impregnated barrier material within the housing. The barrier material is prepared from an expandable epoxy resin formulation comprising: (i) at least one polyglycidyl compound; (ii)

The present invention relates to a high voltage liquid-filled transformer including a housing and a dielectric liquid impregnated barrier material within the housing. The barrier material is prepared from an expandable epoxy resin formulation comprising: (i) at least one polyglycidyl compound; (ii) at least one curing agent for the polyglycidyl compound; and (iii) at least one blowing agent. An additional aspect of the present invention is a novel barrier component for a liquid-filled transformer. The present invention also relates to a method for manufacturing the novel barrier component. The present invention also relates to a method of manufacturing the transformer.

대표청구항 ▼

[ We claim:] [1.]1. A high voltage liquid-filled transformer prepared bya) supplying a housing;b) producing a foamable resin system by blending, in the presence of at least one blowing agent,i) at least one polyglycidyl compound; andii) at least one curing agent for the polyglycidyl;c) applying a fi

[ We claim:] [1.]1. A high voltage liquid-filled transformer prepared bya) supplying a housing;b) producing a foamable resin system by blending, in the presence of at least one blowing agent,i) at least one polyglycidyl compound; andii) at least one curing agent for the polyglycidyl;c) applying a first and second layer of the foamable resin system onto each major surface of a first substrate layer to produce a laminated structure;d) subjecting the laminated structure to heat and pressure as the first and second layer of the foamable resin system react;e) fitting the laminated structure within the housing; andf) impregnating the fitted laminated structure with a dielectric liquid.