摘要:
La présente invention concerne un appareil électrique moyenne ou haute tension comprenant une enceinte étanche dans laquelle se trouvent des composants électriques recouverts d'une couche diélectrique solide et un milieu gazeux assurant l'isolation électrique et/ou l'extinction des arcs électriques comprenant de l'heptafluoroisobutyronitrile et un gaz de dilution, l'épaisseur de la couche diélectrique solide étant inférieure à 1 mm et cette dernière étant réalisée en un matériau comprenant une résine polyépoxyde ou polyuréthane contenant éventuellement une charge ou de l'oxyde d'aluminium.
摘要:
A system and a process for continuously electrolytically coating a light metal coil is provided. The system includes a bath containing a precursor for an electroceramic coating on a light metal coil and containing a cathodic connection, at least one motor connected to at least one motive assembly to impart movement to the coil. A power source provides voltage and current to the coil through the electrification device, and through the coil in the bath to the cathode connection via the aqueous electrolytic solution. The process includes electrifying bare coil with a voltage and a current, passing the electrified bare light metal coil through a bath having a cathodic connection and containing an aqueous solution with a precursor for an electroceramic coating, and electrochemically reacting the light metal coil with the precursor thereby generating a coated light metal coil having an electroceramic coating on at least one surface.
摘要:
It is disclosed a multi-phase power cable comprising: a plurality of phase cores, each including an insulated electric conductor; a screen assembly comprising a metallic screen rod; a moisture barrier metallic sheet enclosing the plurality of phase cores and the screen rod; an outer jacket radially outer to the moisture barrier metallic sheet; and a multilayer arrangement comprising a first, second and third semiconducting water swellable layers surrounding the phase cores and in radial internal position with respect to the moisture barrier metallic sheet and in electric contact therewith, the screen assembly being arranged between said second and third semiconducting water swellable layers.
摘要:
A technique facilitates construction of an electrical cable, e.g. a power cable. The electrical cable comprises a conductor for conducting electricity and protective insulation layers which enable operation of the electrical cable in harsh environments and/or at higher voltages. The conductor is protected by an internal elastomeric jacket disposed around the conductor and comprising ethylene propylene diene monomer (EPDM). Additionally, the conductor is protected by an external elastomeric jacket disposed around the internal elastomeric jacket and comprising portions of nitrile rubber (e.g. NBR or HNBR) and EPDM bonded together.
摘要:
A laminated cable includes a metal laminate (102) surrounding a cable core (100) having first and second ends (106, 110). Solder is applied adjacent the ends of the laminate (102), and is heated and subsequently cooled to form a metal seal (300). The solder can be melted in a plastic jacketing extruder as the extruder applies a plastic jacket over the metal laminate.
摘要:
The present disclosure relates to a self-cleaning cable assembly useful for overhead high voltage electricity transmission. The self-cleaning cable assembly includes a conductor and a self-cleaning layer that surrounds the conductor and includes one or more of a photocatalyst and an electrocatalyst. The present disclosure also relates to methods of reducing surface buildup on cable assemblies for overhead high voltage electricity transmission.
摘要:
The invention relates to the electric power industry, and more particularly to the design of conductors for overhead transmission lines and electrical power networks and to methods for the manufacture thereof. An overhead transmission line conductor comprises a stranded conducting core consisting of wires, wherein at least three of the wires of the stranded conducting core are provided with a load-bearing element disposed inside each of the wires and configured in the form of a long-length rod made from a continuously reinforced composite material having a thermosetting polymer matrix or a metal matrix. The invention makes it possible to manufacture conductors for overhead transmission lines having increased mechanical strength, a low thermal expansion coefficient and reduced weight, which are reliable and highly resistant, under operating conditions, to the impact of active environmental factors. The result is a long operating life. The transmission capacity of overhead lines is increased.