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Simple relay protection, the main provisions, the features of the simulation of relay protection and automation.

The essence of the method of symmetrical components in three sentences

Physically symmetric components in electrical circuits do not exist. Symmetric components were introduced to significantly simplify the calculation of three-phase circuits due to the fact that the mathematically asymmetric system of three arbitrary vectors can always be replaced by two symmetric systems of vectors and one system of three co-directional vectors (Fig. 1).

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