# MATHEMATICAL MODEL OF FIRE PROTECTION OF ELECTRICAL NETWORKS IN SWITCHING PLACES DURING EXCESSIVE LOCAL HEATING

## Authors

• O. Zobenko Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defense of Ukraine

## Keywords:

mathematical model, fire protection, electrical networks, excessive heating in switching places

## Abstract

The field of the mathematical model of the fire protection of electrical networks in the places of switching of excessive consumer capacities is within the limits determined by the operating temperature of the element of the fire protection system, which, in turn, is between the maximum permissible operating temperature of the plug-socket contact connection and the temperature of destruction of the structural elements of the fire protection system protection, and is specified on the one hand by the self-ignition temperature of the materials of the elements of the fire protection system, and on the other hand by the self-ignition temperature of other materials that are in contact with or near the element of the fire protection system. The mathematical model of fire protection of electrical networks at the switching points of excessive consumer capacities is a system of two analytical dependencies. The first one describes the dependence of the main parameters of the element of the fire protection system on the main parameters of electrical networks in the places of switching of excessive consumer capacities. The second allows you to determine the effective parameters of the element of the fire protection system depending on the options for solving individual problems The field of formation of a mathematical model of fire protection of electrical networks has been studied. The purpose of the study is to develop a mathematical model of fire protection of electrical networks in switching points during excessive local heating. Reasoned solutions to the problem of determining transient processes during a short circuit and the problem of calculating the short circuit jets and determining the temperature and time of operation of the fuse have been solved. On the basis of the obtained results, a mathematical model of fire protection of electrical networks at switching points during excessive local heating was developed.

## Author Biography

### O. Zobenko, Cherkasy Institute of Fire Safety named after Chornobyl Heroes of National University of Civil Defense of Ukraine

Lecturer the department of automatic safety systems and electrical installations

## References

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2022-10-17

## How to Cite

Zobenko, O. (2022). MATHEMATICAL MODEL OF FIRE PROTECTION OF ELECTRICAL NETWORKS IN SWITCHING PLACES DURING EXCESSIVE LOCAL HEATING. Municipal Economy of Cities, 4(171), 101–106. https://doi.org/10.33042/2522-1809-2022-4-171-101-106

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