STARTING CURRENTS IN TOROIDAL TRANSFORMERS
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Abstract
The analysis of the causes of starting currents in toroidal transformers is carried out. The moment of occurrence of the maximum values of starting currents is revealed. A theoretical estimate of the calculation of the magnitude of the starting currents is given. Indirect and direct methods for estimating inrush currents, constructive measures to reduce inrush currents, as well as techniques for reducing the influence of transients on circuit breakers when operating toroidal transformers in a network with sinusoidal voltage are considered. A program has been developed for calculating starting currents for electrical steel 3413. The algorithm of the program and the results of its application are given. The results obtained can be applied to ensure the reliability of power supply at the stages of operation and installation of toroidal transformers of medium and high power.
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