SKARVANORDNING FOR EN- ELLER FLERPARTKABLAR

• Main Authors: ZARELLA A, PORTINARI G
• Format: Patent
• Language: Swedish
• Published: 10.11.1975
• Subjects: BASIC ELECTRIC ELEMENTS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; CURRENT COLLECTORS; ELECTRICITY; GENERATION; INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES; LINE CONNECTORS

1415967 Cable joints INDUSTRIE PIRELLI SpA 8 Nov 1973 [16 Nov 1972] 51955/73 Heading H2E An electric-cable joint sealing arrangement comprises an elastic sleeve 29 surrounding a joint between cables 11, 12, a rigid sleeve 36 fitting over sleeve 29 and, encircling cables 11, 12, members 37, 38 axially displaceable into the ends of sleeve 36 by nuts and bolts through flanges 39, 45, 46 transmitting forces between sleeve 36 and members 37, 38 to compress axially sleeve 29. Each end 31, 32 of semi-conductive screen 30 is exposed on the inside of sleeve 29, in which it is at least partially embedded. The cylindrical portion 33 and the frusto-conical portions 34, 35 may be integral or separate, when the portion 33 may be on the outer surface of sleeve 29 and longer than the gap between portions 34 and 35. There is a cylindrical screen 27, made semi-conductive by fillers, on the central region of the inner surface of sleeve 29. Tubular members 37, 38 threadedly engage tubes 57, 58 surrounding cables 11, 12 to compress annular stuffing-box seals 59, 60. Elastic conductive annular member 25 is electrically connected, directly or via pressure connector 23 to conductors 21, 22 and makes electrical contact via cylindrical member 26 to screen 27. The sleeve 29 may have a natural inner diameter greater than screens 15 and 16. Each cable 11, 12 may include an insulating extruded elastomeric or plastomeric layer 19, 20, of the EPR, EPM, EPDM, polythene, PVC or cross-linked polythene type. Member 25 may be of a rubber compound with semi-conductive fillers. Sleeve 29 is of EPR, EPM, EPDM or rubber. Sleeve 36 may be of aluminium. Member 26 is two half shells of aluminium or a rigid insulating material or omitted. In the two latter cases semi-conductor rubber connects conductors 21, 22 electrically to screen 27. O-rings 51, 52 and plastics rings 61, 62, 63, 64 are interposed between flanges 49, 50 and sleeve 29. Copper screens 15, 16 may be connected together electrically via members 37, 38 joined either by sleeve 36 or a conductive strand. The order of assembly is described.