Ekibastuz–Kokshetau high-voltage line
electric power line in Kazakhstan
The Ekibastuz–Kokshetau high-voltage line is an alternating current electrical power transmission line in Kazakhstan from Ekibastuz to Kokshetau. It was the first commercially used power line in the world which operated at 1,150 kV, the highest transmission line voltage in the world. It is a part of the Itatsk (Sharypovo)–Barnaul–Ekibastuz–Kokshetau–Kostanay–Chelyabinsk (Siberia–Kazakhstan–Urals) transmission system, which was designed to transfer electricity from Siberia and Kazakhstan to industrial regions in the Urals.
Designated as power line number 1101, it runs 432 kilometres (268 mi) from Ekibastuz to Kokshetau. It is mounted on transmission towers with an average height of 45 metres (148 ft). The weight of the conductors between the spans is approximately 50 tons. With a voltage of 1,150 kV, the line had a maximum transfer capacity of 5,500 MW.
The whole length of the Siberia–Kazakhstan–Urals line is 2,344 kilometres (1,456 mi), of which 1,421 kilometres (883 mi) is located in Kazakhstan and the rest is located in Russia.
History
In 1973, the Soviet Union built a three-phase UHV experimental test circuit over a kilometre long at the Beily Rast substation, near Dmitrov in Moscow region. In 1978, a 270 km UHV test line for industrial use was built from Sharypovo to Novokuznetsk. In 1985, this test line became part of the Siberia–Urals line.
The public source identifies “Ekibastuz–Kokshetau high-voltage line” as electric power line in Kazakhstan. This brief keeps that definition visible, then builds a research path around Ekibastuz, Kokshetau and high-voltage.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 6, 2026. The linked authority identifier is Q1256715. None of the 1 selected statements returned an explicit reference. The first chronological checks are 1101, 1973, 1978 and 1985.
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This entry incorporates text from “Ekibastuz–Kokshetau high-voltage line” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.