Compared with overhead lines and old-fashioned oil-filled cables, this type of cable has good insulation performance and allows high operating temperature.
Shielding layer In order to uniformly conductive core and insulated electric field, medium and high voltage power cables of 6kV and above generally have a conductor shielding layer and an insulating shielding layer, and some low voltage cables are not provided with a shielding layer.
The wire is used to carry a current conducting metal wire. There are various forms such as solid, stranded or foil braided. According to the insulation condition, it is divided into two categories: bare wire and insulated wire.
In the case of laying power cables along marshes or water, the whole power cable capable of withstanding tensile force should be selected. When passing through a small stream, a power cable with armor (used outside the armor) should be used.
Power cables are affected by different factors in different operating environments. Among them, moisture is the most important factor, so the insulation and sealing of power cables should be done...
Composite failures (insulations in both insulating materials and metallic materials) mean that the insulation between the core and the core is faulty. It includes a phase disconnection and grounding, two-phase disconnection and grounding, two-phase short-circuit and grounding.
The pace of rail transit construction has accelerated, and the increase in mileage of railway operations has led to the expansion of demand for rail transit cables, and the demand for wires and cables has also increased.
Wire and cable are indispensable in our lives. Without them, we may still stay in the state of watching the shadows. But how much do you know about wires and cables? Let us briefly introduce the wire and cable:
Power cables are cable products used to transmit and distribute high-power electrical energy in the backbone of power systems, including various voltage levels of 1-500KV and above, and various insulated power cables.
Power cables are cable products used to transmit and distribute high-power electrical energy in the backbone of power systems, including various voltage levels of 1-500KV and above, and various insulated power cables.
In 1879, the American inventor T.A. Edison wrapped jute around a copper rod and put it into the iron pipe, and then filled the asphalt mixture to make a cable.
