Estimate of intrinsic safety of capacitive circuits

A universal method has been developed and tested for computer estimate of intrinsic safety of inductive capacitive circuits, which takes into account the most hazardous discharge type by contact closure and the regression dependences are obtained of minimal igniting energy on discharge time in a capacitive circuit and the comparison is made of results with available experimental dependences. A regression equation is received which connects minimal igniting energy and discharge time as well as voltage of a capacitive circuit. The comparison of the results with available experimental dependencies is made. The intrinsic safety parameters are defined which leads to decrease of risk for explosion and freely burning fire in a coal mine.

To the theory of modeling of electric power and electric contact systems

This study evaluated questions of optimum control solution of ordinary differential equations’ nonlinear system which in particular, describes control processes of electric power systems. Conducted numerical experiments have shown sufficient efficiency of the implemented algorithms. It has been shown that essential feature of heating conditions in contact space occur in the moment of contact closure or contact breaking, which has t−1/2 order.

Tests of contact closure for contact circuits

The paper is concerned with the problem of synthesis of two-pole contact circuits implementing