Abstract
Several designs of wide-range current transformers (TT) have been developed. The analysis of their work has established that the most complete requirements of control and control systems are met by TT, in which the wide range is implemented by the implementation of a spiral core in the form of an Archimedean spiral. This leads to an increase in the stability of the TT. The developed TT consists of a fixed hollow core 1 in the form of a spiral made of non-magnetic and non-conductive material, a primary winding 2 applied according to the required functional law to a fixed core 1, a movable ferromagnetic magnetic core 3 that can rotate around a common axis 4 with the help of a holder 5, a secondary winding 6 located in the inner cavity of a movable ferromagnetic core 3 and a ferromagnetic liquid 7 filling the parts of a spiral hollow tube covered by a movable ferromagnetic core 3 of 1.
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