Assessment of the possible use of polythene/gas dielectrics in h.v. cables

Rhodes, Rhys; Wootton, R. E.; Nugent, H.

doi:10.1049/piee.1965.0263

Cited by 3 publications

(1 citation statement)

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“…8 " 10 Pressurising the gas is used to raise the impulse strength and discharge-inception stress. The experimental results on flat and cylindrical models indicate that design stresses equal to those commonly used in oil-filled-paper cables might be possible.…”

Section: Introductionmentioning

confidence: 99%

Characteristic properties of oil-impregnated laminated synthetic insulation for extra-high-voltage cables

Vermeer

Boone

1967

Proc. Inst. Electr. Eng. UK

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SynopsisIn the paper a review is given of the properties of oil-impregnated lapped-plastic-tape dielectrics for use as insulation in extra-high-voltage underground cables. The following subjects are discussed: choice of combinable materials, impregnation technique, results of breakdown measurements as a function of various different parameters, dielectric-loss measurements and thermal conductivity. It appears that a cable insulation with a breakdown strength 80% higher than that of oil-impregnated-paper insulation is technically possible. The new insulation, consisting of film tapes of polyphenylene oxide impregnated with paraffinic oil, has a dissipation factor more than five times smaller than that of conventional oil-impregnated paper.In cables with such an insulation, operating stresses of 15-37kV/mm, depending on tape thickness and pressure, may be applied.

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Section: Introductionmentioning

confidence: 99%