The unified quarry cell is designed for operation in electrical installations of three-phase alternating current with frequency of 50 and 60 Hz with voltage of 6 and 10 kV for the system with isolated or earthed through the arc suppression reactor neutral, in conditions of moderate (U) climate and placement category 1 according to GOST 15150.
Quarry unified cells are used for connection of power supply and protection of electrical equipment of powerful quarry electrical consumers. The principle of operation is determined by a set of schemes of main and auxiliary circuits.
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