Bershads'kyj I. Adjustable ferrohydrodynamic the indicator of a current with contactless transfer of an information about reaching threshold signicance

The purpose of work is the development of a technique of account and creation of the liquid gauge of the control of a current of the increased sensitivity with contactless transfer of the information about his threshold meaning, which realization is carried out as ferrohydrodynamic of the index of a current of short circuit (FICSC) for air lines of distributive networks. Such the indicator has high reliability caused by absence of mobile and contact details and mechanisms. The techniques of account of electromagnetic system FICSC are developed on the basis of equivalent circuits of the multiplanimetric ramified nonlinear magnetic circuit, and also with use of a method of final elements. The analysis of dynamic characteristics FICSC with the account many-dimensional of heterogeneity of electromagnetic forces in a working backlash is executed. The constructive factors are determined, at which the efficiency of functioning of the device in conditions of decrease setting of a current SC raises. The circui t of remote indication is developed out of contact few-consumpting optic-electronic. The method of optimization of a structure of poles of the indicator is offered, the measures on expansion of a working temperature range are offered. Made full-scale experienced samples, which are recommended for industrial development and the applications on air lines by a voltage 6-10 kV. Results of work can be used at improvement of existing means of search of the injured branches in distributive networks.