by Electric Power Research Institute .
Written in English
|Statement||Allam, E. M.|
|The Physical Object|
|Pagination||var. $0.00 C.1 $0.00 C.2.|
, English, Book edition: Development of optimized ppp insulated pipe-cable systems in the commercial voltage range / E.M. Allam, et al. Get this edition User activity. Optimized PPP-insulated pipe type cable system for the commercial voltage range. An EPRI project with the objective of developing an optimized kV paper-polypropylene-paper pipe cable. E.M. Allam's 10 research works with 46 citations and 95 reads, including: Development and commercialization of PPP-insulated pipe-type cable systems. A high voltage, gas filled, pipe type electrical cable and method of manufacture thereof. The cable comprises a plurality of insulated conductors, each conductor having a central gas passageway and being gas permeable. The conductor is wrapped with tapes impregnated with an insulating oil, and the wrapped tapes are encircled by gas permeable layers and skid wires.
Pipe Type Cable systems are less costly, on an installed cost basis, with extra high-voltage solid dielectric cable systems in concrete encased duct banks. Pressurization at psig of the dielectric fluid or nitrogen gas in Pipe Type systems prevents ionization in service under normal and emergency operating conditions. E. M. Allam et al., “Optimized PPP-Insulated Pipe-Type Cable System for the Commercial Voltage Range,” IEEE Paper 86 T&D (September ). Google Scholar 6. An optimized design of kcmil, kV cable insulated with mils of domestic PPP laminate was fabricated and successfully passed all laboratory qualification tests. Thermal resistivities of polyethylene and cross-linked polyethylene are 3,5 Km/W and paper-insulated oil-filled is 5,,5 Km/W. The excellent thermo-physical properties of cross-linked polyethylene cables enable them to display greater continuous emergency and short-circuit carrying load than paper-insulated oil-filled cables.
Medium voltage power systems most widely used in industrial installations comprise cables with extruded insulation, such as crosslinked polyethylene (XLPE) and ethylene-propylene rubber (EPR), and cables with laminated insulation, i.e. fluid-impregnated paper-insulated lead-covered (PILC). These cables, which power vital processes, are. Abstract: Cross-linked polyethylene (XLPE) has replaced oil-paper insulated systems as the primary solution for medium and high voltage AC cables decades ago, since they enable marginally higher operating temperatures and can be produced with high throughput and well-controlled extrusion technology . The base for this insulation is polyethylene (PE), which can be crosslinked either with. OOMWm^mih 25 35 50 70 95 l«rililtallSitf»g(jkiy^ Table Earth fault ratings Low-voltage PVC-and XLPE-insulated / V power cables Note on PVC insulation For PVC insulation continuous conductor temperatures up to 70 °C are permissible. Since paper insulation was used first in the power industry, and was later replaced in low and medium voltage applications, any comparison of properties usually employs the paper-fluid system as the standard.. Transmission cables, which are defined as cables operating above 46 kV, have traditionally used paper / oil systems as the insulation.