PURPOSE: To improve electrical insulation characteristic by employing a fluororubber having permittivity higher than 4 and volume resistivity higher than 1×1014Ω.cm, as a field relaxation layer, at the joint or terminal of an XLP power cable.
CONSTITUTION: Joint of a crosslinked polyethylene (XLPE) cable being employed as a power cable comprises a conductor 1, an inner semiconductor layer 2, an insulating layer 3, and an outer semiconductor layer 4. An inner semiconduc tor layer 6, connected with the inner semiconductive layer 2, is further provided and a field relaxation layer 7 is provided thereon. A reinforcing insulator 8, connected with the insulator of the cable, is provided at the outside of the field relaxation layer 7 and an outer semiconductive layer 10, connected with the field relaxation layer 9 and the outer semiconductive layer 4 of the cable, is further provided at the outside. The field relaxation layers 7, 9 are composed of fluororubber having permittivity higher than 4 and volume resistivity higher than 1×1014Ω.cm.
| WO/1996/021963 | PRESTRETCHED MODULAR BARRIER BOOT |
GOTO KAZUHIKO
AIDA ATSUO
| JPS61176929U | 1986-11-05 | |||
| JPS61258727A | 1986-11-17 |