EMERGENCY OVERLOAD CHARACTERISTICS OF EXTRUDED DIELECTRIC CABLES OPERATING AT 130 degree AND ABOVE.

被引：0

作者：

Katz, C. ^{[1
]}

Dima, A. ^{[1
]}

Zidon, A. ^{[1
]}

Ezrin, M. ^{[1
]}

Zengel, W. ^{[1
]}

Bernstein, B. ^{[1
]}

机构：

[1] Cable Technology Lab Inc, New, Brunswick, NJ, USA, Cable Technology Lab Inc, New Brunswick, NJ, USA

来源：

IEEE transactions on power apparatus and systems | 1984年 / PAS-103卷 / 12期

关键词：

AGING OF MATERIALS - Applications - ELECTRIC INSULATING MATERIALS - Plastics - POLYVINYL CHLORIDE - Decomposition - SEMICONDUCTING POLYMERS - Applications - THERMOSETS - Thermal Effects;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The present work indicates that crosslinked polyethylene (XLPE) and ethylene propylene insulated cables are suitable for emergency operation during extended periods at 130 degree C and may be suitable up to 145 degree C, provided semiconducting shield and jacket materials are used that do not decompose at these temperatures. The work was performed on new cables, without prior field aging. Investigations were performed on short samples in ovens, long samples in simulated ducts in the laboratory and in a typical utility duct bank. Tests indicate that conventional polyvinyl chloride (PVC) jackets can decompose at recommended emergency temperatures and adversely affect the cable insulation system. It was found that the insulation system (conductor shield-insulation-insulation shield) behavior differs from that of its individual components. Satisfactory thermal stability of the cable insulations is due to a large degree to the protection provided by the semiconducting shields (based on an ethylene vinyl acetate compound). Supportive evidence is presented to show that present emergency overload cable ratings may be conservative, and that temperatures and times at high temperature can possibly be increased to the advantage of the utility industry.

引用

页码：3454 / 3463