EN skjermet styrekabel brukes vanligvis som forbindelseslinje for elektriske instrumenter.
Den er egnet for tilkoblingslinjen til elektriske instrumenter med en AC-merket spenning på 450/750V og lavere og overføringslinjen til det automatiske kontrollsystemet.
Den har utmerkede egenskaper som oljebestandighet, vannmotstand, slitestyrke, syre- og alkaliresistens, motstand mot ulike etsende gasser, aldringsmotstand, og ikke-brennbarhet.
EN skjermet styrekabel is a cable with a layer of mesh copper or metal wire woven around one or more wires. This layer of mesh metal wire can prevent lightning strikes and external signals cannot interfere with it.
The shield also provides some leakage protection. If the cable is damaged during use and leaks, the shield can direct the leakage current to the ground wire, providing some safety protection.
The role of shielding and grounding wire of shielded control cable is that the shielding layer is divided into internal shielding and external shielding.
They are both to make good contact between the cable conductor and insulation layer, and between the cable insulation layer and the inner protective layer, to eliminate the increase of surface electric field strength caused by the unsmooth surface of the conductor and the inner protective layer.
Product characteristics of shielded control cables.
(1) Allowable bending radius of the cable: the minimum bending radius of a non-armored cable is 6 times the outer diameter av kabelen. Fluoroplastic insulated and sheathed cables should be at least 8 ganger kabelens ytre diameter. Copper tape shielded or steel tape armored cable should be at least 12 ganger kabelens ytre diameter.
(2) Maximum operating temperature: polytetrafluoroethylene propylene (F46) insulation should not exceed 200 ℃. Soluble polytetrafluoroethylene (PFA) insulation should not exceed 260 ℃.
(3) Minimum ambient temperature. PVC-kappe: fixed laying -40℃, non-fixed laying -15℃. Fluorine plastic and silicone rubber sheath: fixed laying -60℃, non-fixed laying -20℃. Cable installation and laying temperature shall not be lower than 0℃ (fluoroplastic, silicone rubber and nitrile sheathed cable shall not be lower than -25℃).
