AMC of Electrical

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Commercial Fixed wiring

09 August, 2019 9

Fixed wiring is essential for all the electrical activities necessary on the site. This includes ensuring all the vital spots of a construction site have electrical power to use the heavy-duty equipment. This means installing power cables, sockets, distribution boards, etc.

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Construction of high voltage electrical substations

13 November, 2020 21

Ultra-high-voltage and high-voltage substations are powered by high-voltage power lines, which are used to import and export electricity over long distances. Standards for such substations vary by country. For example, in the countries of Eastern Europe and the former USSR high-voltage substations are designed for voltage of 1250 kV, 750 kV or 400 kV.

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Electrical substation construction

17 March, 2020 7

The construction of an electrical substation typically includes several stages: • preparation of the construction site and earthwork; • laying the foundation and supply of external networks; • construction of supporting metal structures; • assembly and installation of electrical equipment; • installation and configuration of auxiliary systems; • landscaping and cleaning construction waste; • testing and commissioning.

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Construction of local area substations

11 December, 2019 15

Local area substations are connected directly to power plants or to high-voltage substations through overhead or underground power lines. These facilities provide energy to local areas with a large number of consumers. Modern technologies allow you to build these objects both in an open area, and in densely built-up urban areas. The number of busbars and other technical features of local substations are determined by the type, quantity and characteristics of electricity consumers.

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SF6 gas-insulated switchgears

13 March, 2021 12

With the development of gas-insulated switchgear technology, the approach to the construction of electrical substations has changed significantly. This is an innovative technology in which all equipment is placed in a sealed metal case filled with SF6 gas (sulfur hexafluoride). Since the 2000s, this technology has made it possible to seal equipment with voltages up to 750 kV. Due to the highest degree of equipment integration, modern substations take up much less space and practically do not require periodic maintenance.

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High-voltage vacuum switchgears

20 June, 2021 17

Vacuum technology has shown even better results than using air, gas or oil. High-voltage vacuum switchgears are safer and more reliable in situations where trips often occur, including a short circuit. The advantage of vacuum switchgears is that they are almost maintenance free. The dielectric strength of a vacuum is 8 times higher than that of air, and 4 times higher than that of gas at a pressure of 1 bar. Due to this, the distance between the open contacts can be quite short, up to 8 mm at 35 kV.

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