GB814257A - Improvements in or relating to sealing ends for electric cables - Google Patents

Abstract

814,257. Sealing ends for gas-filled cables. BRITISH INSULATED CALLENDER'S (SUBMARINE CABLES) Ltd. Jan. 11, 1957 [Jan. 12, 1956], No. 1157/56. Class 36. Gas is fed into the conductor of a gas pressure cable by an arrangement comprising a cable sealing end, a gas feed sealing end including a base plate 7 carrying inner and outer tubular insulators 12, 3 and a cover 10 for the hightension end of the latter, a gas supply pipes 19 into the low-tension end of the inner insulator and a gas withdrawal pipe 2 at the high-tension end of this insulator communicating with the high-tension end of the cable sealing end. The insulators 12, 3 of the gas feed sealing end (Fig. 2) are sealed to base plate 7 having an aperture 18 coincident with the bore of the insulator 12 and through which gas is fed from the pipe 19. The upper end of insulator 12 is sealed to a cover plate 15 in which is mounted a pipe 20 passing through and sealed to cover 10. A dome-like cover 25 for the plate 10 encloses the open end of pipe 20 and has pipe 2 sealed thereto, which is thus insulated from pipe 19. The upper end of the cable sealing end insulator 33 is sealed to cover plate 35 through which is sealed a tubular terminal 37 having a tube 40 projecting from its lower end into the hollow cable conductor 39. The plate 35 has a domelike cover 46 and is formed with apertures 47 through which gas can flow into the insulator 33. Reverse flow of the liquid compound filling the insulator is prevented by wire gauze and neoprene discs 48, 49 which are held against the lower surface of plate 35. The pipe 2 is sealed to cover 46, a gas restriction valve 52 being provided. The cover 46 is electrically connected to plate 35 and carries the cable terminal 54.