Electricity: conductors and insulators – Conduits – cables or conductors – Conductive armor or sheath
Patent
1980-04-14
1982-11-23
Kucia, Richard R.
Electricity: conductors and insulators
Conduits, cables or conductors
Conductive armor or sheath
174110PM, 174120SC, H01B 902
Patent
active
043607063
ABSTRACT:
A product by process for reducing micro-voids in cross-linked cable insulation without reducing the voltage breakdown strength thereof in which process the insulation, after cross-linking, is heated at a temperature in the range from about 120.degree. C. to about 150.degree. C. and under a pressure less than 10 mm. Hg for a period from about 8 hours to 48 hours. Also, a cable having such insulation which has micro-voids less than about 10.sup.2 per mm.sup.3 and a perforation gradient greater than the perforation gradient of a cable which has not been so treated.
REFERENCES:
patent: 2462149 (1949-02-01), Webb
patent: 3452126 (1969-06-01), Sieron
patent: 3819410 (1974-06-01), Kuckro et al.
patent: 4005254 (1977-01-01), MacKenzie
patent: 4029830 (1977-06-01), Yamamoto et al.
Yoda et al., Development of EHV Cross-Linked Polyetheylene Insulated Power Cables, IEEE Trans. Power App. & Systems, V. PAS 92 #2, Mar.-Apr., 1973, pp. 506 to 512.
Kageyama et al., Micro-Voids in Cross-Linked Polyetheylen Insulated Cables, IEEE Transaction of Power Appar. & Syst. (V. PAS 94 #4, 7/08/75, pp. 1258-1263.
Lanfranconi Gianmario
Vecellio Bernardino
Industrie Pirelli S.p.A.
Kucia Richard R.
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