Electrical insulation system

An interrelated group of components capable of being assembled to form a high voltage electrical insulation system comprising

• means adapted to be disposed about a high voltage current carrying component for electrically insulating said high voltage current carrying component, said electrically insulating means comprising a porous, open cell, polymeric, dielectric solid having a plurality of pores and
• dielectric means for impregnating said solid and adapted to fill said pores, said dielectric impregnating means comprising a non-gaseous dielectric impregnant,
• said dielectric solid being formed from a plurality of component polymeric particles bonded together to form said dielectric solid, the average finished diametric size of said component particles being in the range of .2 micron to 50 microns.

An interrelated group of components capable of being assembled to form a high voltage electrical insulation system comprising

• means adapted to be dispose about a high voltage current carrying component for electrically insulating said high voltage current carrying component, said electrically insulating means comprising a porous, open cell, polymeric, dielectric solid having a plurality of pores and
• dielectric means for impregnating said solid and adapted to fill said pores, said dielectric impregnating means comprising a non-gaseous dielectric impregnant, and
• electrically conductive material affixed to a surface of said dielectric solid and adapted to provide high voltage stress relief when disposed about said high voltage current carrying component.

A high voltage electrical system comprising

• a current carrying conductive means and
• means providing electrical insulation about said current carrying conductive means, said electrical insulation providing means comprising a porous, open cell, polymeric, dielectric solid having a plurality of pores and dielectric means impregnating said solid and filling substantially all of said pores, said dielectric impregnating means comprising a non-gaseous dielectric impregnant, said non-gaseous dielectric impregnant comprising a dielectric gel immobilized in the pores of said dielectric solid.

A high voltage electrical stress relief device comprising means for relieving high voltage electrical stresses in the vicinity of a current carrying conductor, said stresses relieving means including a porous, open cell, polymeric, dielectric solid having a plurality of pores and means impregnating said dielectric solid and filling substantially all of said pores, said impregnating means comprising a non-gaseous dielectric impregnant, said dielectric impregnant comprising a dielectric gel immobilized in the pores of said dielectric solid.

A high voltage electrical stress relief device comprising means for relieving high voltage electrical stresses in the vicinity of a current carrying conductor, said stresses relieving means including a porous, open cell, polymeric, dielectric solid having a plurality of pores and means impregnating said dielectric solid and filling substantially all of said pores, said impregnating means comprising a non-gaseous dielectric impregnant, said stresses relieving means further including a second, porous, open cell, polymeric, dielectric solid formed from a different polymer than the polymer of said first mentioned dielectric solid and assembled together with said first mentioned dielectric solid as component parts of said high voltage electrical stress relief device.

A high voltage electrical stress relief device comprising means for relieving high voltage electrical stresses in the vicinity of a current carrying conductor, said stresses relieving means including porous, open cell, polymeric, dielectric solid having a plurality of pores and means impregnating said dielectric solid and filling substantially all of said pores, said impregnating means comprising a non-gaseous dielectric impregnant, said stresses relieving means further including second and third porous, open cell, polymeric, dielectric solids assembled together with said first mentioned dielectric solid as component parts of said high voltage electrical stress relief device, said second and third dielectric solids having interior surfaces configured to mate with an exterior surface of said first mentioned dielectric solid.

A cable termination having component parts and capable of terminating the end of an elongated power cable having an elongated current carrying conductor, cable insulation surrounding said current carrying conductor and an outer conductive sheath surrounding an elongated portion of said cable insulation, comprising

• an outer rigid dielectric housing adapted to receive said end of said power cable within said housing,
• an elongated electrical stress relief device adapted to be fitted over and to surround an elongated portion of said cable insulation, said electrical stress relief device comprising a porous, open cell, polymeric, dielectric solid having a plurality of pores and means for impregnating said dielectric solid and adapted to fill said pores, said impregnating means comprising a non-gaseous dielectric impregnant.

An interrelated group of components capable of being assembled together as an electrical insulator in high voltage electrical apparatus of the type utilizing a dielectric liquid insulation system comprising

• a porous, open cell, polymeric, dielectric solid having a plurality of pores and
• means for impregnating said dielectric solid and adapted to fill said pores, said impregnating means comprising the dielectric liquid of a dielectric liquid insulation system adapted to provide electrical insulation when contained within said high voltage electrical apparatus, said dielectric solid being formed from a plurality of component polymeric particles bonded together to form said dielectric solid, the average finished diametric size of said component particles being in the range of 0.2 micron to 4 microns.