As we all know, power industry, the voltage levels commonly are 220v, 380v, 1kv, 10kv, 35kv, 110kv, 220kv, 500kv in power industry. Also, 220v and 380v are considered to be low voltage, mainly for household electricity. In addition, 35kv and above are high voltage, mainly used for power transmission. In between, it is medium voltage. It must be point...
High-voltage cable is a type of power cable, which refers to a power cable used to transmit between 1kv and 1000kv. And it is mostly used for power transmission and distribution.The components of the HV cable from the inside to the outside include: conductor, insulation, internal sheath, filler (armor) and external sheath. Of course, the armored hi...
When the power cable passes a certain load current, it will definitely heat up. As the load current increases, the surface temperature of the cable will be higher. If it is not handled in time, the consequences can be imagined. Such as: PVC cable, considering the core temperature of 70 degrees as the upper limit, the surface temperature will be 5-10 degrees lo...
In recent years, with the rapid development of the communications industry, wire and cable products have also developed at an astonishing speed. The use of cables has also been greatly improved and is very flexible. The cable can be wound on the cable reel with a bending radius ≥20D, where D is the outer diameter of the cable. Some cables are smokeless and non...
The fault finding of the low voltage cable is not much different from the fault finding of the high voltage cable. The method and technique are identical.
Test Procedure of AC Withstand Voltage Test for Power CablesAt present, there are more and more XLPE insulated power cables in the world and domestic to replace the original oil-filled paper-insulated power cables. However, due to the large capacity of the test and the test equipment, the test method of DC withstand voltage has been followed for a long time...
What is high voltage cable?
The International Electrotechnical Commission’s standard IEC 60840 references the requirements for cables and cable accessories with a voltage rating of between 30kV (Um 36kV) and 150kV (Um 170kV). The cables are of either single core or individually screened three-core cables but, as with the lower voltage stan...
Hearings held on Irish high-voltage transmission planIrish grid operator EirGrid recently on high-voltage transmission corridor connecting southern and northern Ireland plans to hold public hearings.
According to reports, this high voltage overhead transmission corridor will connect Taryn County Meath and a total length of 138 km, which is an...
The difference between high and low voltage cablesFor materials, the low voltage cable can use copper or aluminum for the conductor, high voltage cable copper conductor is more, in addition to the overhead lines (steel core aluminum stranded wire, etc.);
From the conductor cross-sectional area, because the high voltage cable on the carrying capaci...
