Bushing comprising a condenser body and electrical facility with bushing
A bushing comprises an electrical conductor and a condenser body through which the electrical conductor extends, wherein the condenser body comprises electrically insulating layers and electrically conducting layers, wherein the electrically insulating layers comprise an oil-impregnated paper comprising at least one of a thermally upgraded paper and a paper comprising synthetic fibers.
1 . An electrical facility comprising a tank and a bushing leading through a wall of the tank, the bushing comprising:
an electrical conductor and a condenser body through which the electrical conductor extends,
wherein the condenser body comprises electrically insulating layers and electrically conducting layers, wherein the electrically insulating layers comprise an oil-impregnated paper, wherein the paper comprises a thermally upgraded paper that includes synthetic fibers, wherein the paper is impregnated by ester oil, and wherein the tank is filled by ester oil.
2 . The electrical facility of claim 1 , wherein the paper is based on cellulose.
3 . The electrical facility of claim 1 , wherein the paper is a thermally upgraded paper with a nitrogen level in a range of 1% to 4%.
4 . The electrical facility of claim 1 , wherein the paper comprises heat-resistant synthetic fibers in a form of an aramid polymer.
5 . The electrical facility of claim 1 , wherein the paper has a thermal class rating of at least 120° C.
6 . The electrical facility of claim 1 , being a transformer facility comprising one or more transformer windings, wherein the one or more transformer windings comprise a further paper in a form of at least one of a thermally upgraded paper and a paper comprising heat-resistant synthetic fibers.
7 . The electrical facility of claim 6 , wherein the paper of the bushing and the paper of the one or more transformer windings have at least one of a same thermal upgrade and same synthetic fibers.