Development of a computer model and research of technical and design characteristics of circuit breakers in various operating modes

RELEVANCE. Currently, the development and creation of new types and designs of domestic low-voltage switching devices is a prerequisite for the development of the electric power industry and the electrical industry. The article presents a developed computer model for the study and evaluation of the technical and design characteristics of low-voltage switching devices using the example of circuit breakers (CB). THE PURPOSE. Development of a computer model for the study and evaluation of the technical parameters of contact connections CB. METHODS. The article presents a multiplatform approach to the design and evaluation of technical and constructive characteristics of contact connections of low-voltage switching devices using the example of CB. Three-dimensional modeling is performed in the Solid Edge program, input of the geometry parameters of the contact joints is carried out using Microsoft Excel, physical processes are modeled in the COMSOL Multiphysics program. RESULTS. Using a computer model, it is possible to obtain data on the heating of the contact connections, power losses to the pole of the device, as well as the resistance of the contact connections when the load factor of the device changes from 0.1 to 1.2. CONCLUSIONS. The values of the heating temperature of the contact connections, the probability of trouble-free operation, the resistance of the contact connections, and the loss of power to the pole of the device are determined depending on the change in the number of switching cycles of the CB. The developed computer model allows conducting studies of contact connections and technical parameters in dynamics during operation. The results of the study make it possible to monitor the technical condition of the studied CB in operating modes.

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