A kabel kawalan terlindung biasanya digunakan sebagai talian sambungan alat elektrik.
Ia sesuai untuk talian sambungan instrumen elektrik dengan voltan berkadar AC 450/750V dan ke bawah dan talian penghantaran sistem kawalan automatik.
Ia mempunyai ciri-ciri yang sangat baik seperti rintangan minyak, rintangan air, rintangan haus, rintangan asid dan alkali, rintangan kepada pelbagai gas menghakis, rintangan penuaan, dan tidak mudah terbakar.
A kabel kawalan terlindung 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 daripada kabel. Fluoroplastic insulated and sheathed cables should be at least 8 kali diameter luar kabel. Copper tape shielded or steel tape armored cable should be at least 12 kali diameter luar kabel.
(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 sheath: 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℃).
