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Algorithm for Automated Selection and Verification of Instrument Current Transformers in the Electrical Substations CAD System

One of the most labor-intensive stages of the design of a substation is the selection and testing of electrical equipment. This is due to the need to perform large volumes of uniform calculations. Therefore, the urgent task is to develop computer-aided design systems that allow performing such calculations. This paper is devoted to the development of an algorithm for automated testing of measuring current transformers. The algorithm proposed by the authors makes it possible to automate the execution of calculations related to the verification of the working conditions of measuring transformers in heavy and emergency modes. The algorithm also allows you to test current transformers for the secondary load. The developed algorithm takes into account not only the nominal parameters of the measuring transformer, but also its design, connection scheme, voltage class and type of connection on which it will be used.