Control cables, signaling, INFORMATION AND COMMUNICATION FOR EXPLOSIVE ATMOSPHERES on floating drilling units and fixed offshore platforms (optional)

摘要

The invention relates to the control cables, signaling, information and communication for hazardous areas on offshore drilling units and fixed offshore platforms.; The cable comprises a plurality of conductors stranded copper isolated crosslinked polyethylene or groups of two or three or four of said conductors, twisted together. The strands or twisted into the core group. Voids in the core are filled with resin filler on the basis of PVC plastic.; Superimposed over the core common screen or as a braid of copper or tinned copper conductors, any combination of consecutive layers of a metal-metal tape with overlap upwardly and braid of copper or tinned copper wires. Thus Braid density is selected such that its mass is not less than 90 weight% copper tubing with the same internal diameter and thickness equal to the diameter of the wire braid.; Above the common screen superimposed WATERPROOF sheath neftemaslobenzostoykih resistant to sea water and sea mist polyvinylchloride plastic rubber or polychloroprene, or chlorosulphonated polyethylene.; A design, wherein for each of one or more insulated conductors or groups of individual superposed or, respectively, group screens that match the structure with the common screen, and a shell of materials approved for the manufacture of the insulation and waterproof membrane useful in this model.; To meet the requirements of intrinsic safety shells thickness over the individual and group screens over the overall screen is selected on condition that they withstand test voltage of 500 V AC at 50 Hz, applied between any individual and / or group and / or a common screens.; The design of armored cable.; Design of this utility model will provide fulfillment of requirements for cables specified in the Rules of classification, construction and equipment of mobile offshore drilling units and fixed offshore platforms and for transmitting high-frequency (high-speed) signals and other applicable regulations for explosion-proof equipment.