When selecting wires for overhead lines, aluminum stranded wires that meet national standards should be used, and single-strand aluminum wires, unstrand wires and iron wires are prohibited. When selecting the cross-section, it is necessary to take into account the mechanical strength of the wire to avoid uncertain factors such as wire breakage due to weather changes and external forces.
One of the important items of electrical engineering includes the connection technology of control cables. During the whole connection process, the screen closing and grounding of the city cable are essential construction links. Next we will describe in detail why the control cable screen needs to be grounded?
Both YJV cable and YJY cable are relatively commonly used cables. Many people do not know the difference. Let me explain in detail today. Let's distinguish it from the naming method of the cable. YJ is cross-linked polyethylene insulation, and V single-label PVC sheath at the back.
Recently, Singtel and five other regional operators announced the signing of a contract worth 300 million US dollars to jointly build a 6,000-kilometer submarine cable system, the main purpose of which is to connect Hong Kong, Singapore, the Philippines, Brunei and Hainan Province and other regions, driving the rapid economic growth in Southeast Asia.
The proportion of cables in power lines is gradually increasing with the market demand. Power cables are cable products used to transmit and distribute high-power electric energy in the main line of the power system, including 1-500KV and above various voltage levels and various insulated power cables.
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