Electric power industry
This is a line of voltage class 1150 kV, which was built about 35 years ago in Kazakhstan. It was a unique project for the whole world to transfer electric power of several thousand megawatts from the Ekibastuz coal basin (Kazakhstan) to the center of the USSR. However, after the collapse of the Soviet Union,
In addition to cable and overhead lines, there are mixed lines when, for various reasons, part of the line route is made as an overhead line, and part as a cable one. At the junctions of cable and air sections, special “transition points” have to be equipped. There are a huge number of transitional point
Let me pay attention to one very common mistake that can be very expensive. In the construction of a single-core cables, the main elements are the core and XLPE-insulation. The metal screen (Cu, Al) and the outer sheath of the cable are usually perceived as auxiliary elements of the cable. As a result, people carry
The photo shows the ordinary cable termination of 10 kV, which was overheated due to high currents induced in the screens. We can see traces of excessive heating at the junction of the screen with its grounding wire, caused by significant currents passing there. The quality of the screen and wire connections is a separate
The photo shows a monitor (meter) for metal-oxide surge arrester (MOA). The device combines two functions: 1️⃣ To measure the «conduction current» passing through MOA under the influence of the AC operating voltage of the 50 Hz frequency. 2️⃣ To count the «number of impulses» through MOA. Both functions are absolutely useless! I will explain
On today’s photo there is a nice modern bright transition tower (pylon, support) for mixed cable and overhead line. What can be advised to improve this facility next time? Unfortunately, many details are not so good:✅ Link-boxes for cable screens.✅ Black pipes which protect cables above the ground level.✅ Red corrugated pipes which protect cables