A càball smachd fo dhìon mar as trice air a chleachdadh mar loidhne ceangail ionnstramaidean dealain.
Tha e freagarrach airson loidhne ceangail ionnstramaidean dealain le bholtadh AC de 450/750V agus gu h-ìosal agus loidhne tar-chuir an t-siostam smachd fèin-ghluasadach.
Tha feartan sàr-mhath aige leithid strì an aghaidh ola, strì an aghaidh uisge, strì an aghaidh caitheamh, strì an aghaidh searbhag agus alcalan, an aghaidh diofar ghasaichean creimneach, an aghaidh aosda, agus neo-loisgteachd.
A càball smachd fo dhìon 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 trast-thomhas den chàball. Fluoroplastic insulated and sheathed cables should be at least 8 amannan trast-thomhas a-muigh a’ chàball. Copper tape shielded or steel tape armored cable should be at least 12 amannan trast-thomhas a-muigh a’ chàball.
(2) Maximum operating temperature: polytetrafluoroethylene propylene (F46) insulation should not exceed 200 ℃. Soluble polytetrafluoroethylene (PFA) insulation should not exceed 260 ℃.
(3) Minimum ambient temperature. Còmhdach PVC: 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℃).
