摘要:
A sealing arrangement for the temporary attachment of a testing air line to the end of a cigarette has an essentially hollow cylindrical sealing body with flanges projecting radially to the inside and outside of the sealing end. The other end of the sealing body is held firmly. The outside edge of the outwardly projecting flange of the sealing body is inserted into a coaxial annular groove of the bore of a supporting body movable axially toward the held end to elastically deform the sealing body, permitting insertion or removal of the cigarette. In its undeformed state the sealing body seals against the cigarette end.
摘要:
The invention relates to a semiconductive polymer composition for use in power cables. The composition comprises a multimodal ethylene homo- or copolymer produced in a polymerization process comprising a single site catalyst whereby the polymer composition has a density of 870 to 930 kg/m3, a MFR2 of 1 to 30 g/10 min and a Mw/Mn of less than or equal to 10.
摘要:
In a plant containing a turbo-generator the magnetic circuit of the turbo-generator is included in an electric generator which directly supplies a high supply voltage of 20-800 kV, preferably higher than 36 kV. The insulation of the generator is built up of a cable (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by outer and inner semiconducting layers (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The phases of the winding are Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter.
摘要:
A power transformer having at least one high voltage winding and one low voltage winding. Each of the windings includes at least one current-carrying conductor, a first layer having semiconducting properties provided around said conductor, a solid insulating layer provided around said first layer, and a second layer having semiconducting properties provided around said insulating layer. The windings are intermixed such that turns of the high voltage winding are mixed with turns of the low voltage winding.
摘要:
An insulated conductor for high-voltage windings in electric machines employs conductor formed of one or more strands, an inner, first semi-conductive layer surrounding the strands, a first insulating layer surrounding the inner, first semi-conductive layer and an outer, second semi-conductive layer surrounding the first insulating layer. The second semi-conductive layer has at least two different earth points along the insulated conductor, the second semi-conductive layer has breaks located between consecutive earth points. A shielding device is located in each of said breaks for reducing amplification of the electric field strength produced at the breaks.
摘要:
A semiconductive polymer composition for use in power cables, wherein the composition has a multimodal ethylene homo- or copolymer produced in a polymerization process having a single site catalyst whereby the polymer composition has a density of 870-930 kg/m3, a MFR2 of 1 to 30 g/10 min and a Mw/Mn of less than or equal to 10.
摘要翻译:一种用于电力电缆的半导体聚合物组合物,其中所述组合物具有在具有单中心催化剂的聚合方法中制备的多峰乙烯均聚物或共聚物,由此聚合物组合物的密度为870-930kg / m 3,MFR 2为1 至30g / 10min,Mw / Mn小于或等于10。
摘要:
The invention relates to a semiconductive polymer composition for use in power cables. The composition comprises a multimodal ethylene homo- or copolymer produced in a polymerisation process comprising a single site catalyst whereby the polymer composition has a density of 870 to 930 kg/m3, a MFR2 of 1 to 30 g/10min and a Mw/Mn of less than or equal to 10.
摘要翻译:本发明涉及用于电力电缆的半导体聚合物组合物。 该组合物包含在包含单中心催化剂的聚合方法中制备的多峰乙烯均聚物或共聚物,由此聚合物组合物的密度为870至930kg / m 3,MFR 2为1至30g / 10min,Mw / Mn小于或等于10。
摘要:
The invention relates to a semiconductive polymer composition for use in power cables. The composition comprises a multimodal ethylene homo- or copolymer produced in a polymerisation process comprising a single site catalyst whereby the polymer composition has a density of 870 to 930 kg/m3, a MFR2 of 1 to 30 g/10 min and a Mw/Mn of less than or equal to 10.
摘要:
The magnetic circuit of a generator in a hydro-generator plant is arranged to directly supply a high supply voltage of 20-800 kV, preferably higher than 36 kV. The generator is provided with solid insulation and its winding includes a cable (6) comprising one or more current-carrying conductors (31) with a number of strands (36) surrounded by at least one outer and one inner semiconducting layer (34, 32) and intermediate insulating layers (33). The outer semiconducting layer (34) is at earth potential. The stator winding may be produced with full or fractional slot winding, the phases of the winding being Y-connected. The Y-point may be insulated and protected from over-voltage by means of surge arresters, or else the Y-point may be earthed via a suppression filter. The invention also relates to a hydro-generator plant, a generator included in the plant and a procedure for building such a plant.
摘要:
The cross-linking of a moulded object based on polymeric materials is effected by heating the object in the presence of a liquid medium containing one or more peroxides under conditions that cause penetration, and the heating is continued at increasing temperatures to cause a homogeneous cross-linking.Employable peroxides are substantially stable under the first heating step but are cleaved into free radicals during the second heating step, at least the cross-linking step being carried out with the object enclosed in a liquid of approximately the same density as the polymeric material.