Reliability Parameters of Low-Voltage Switchgear and Cable Lines of Workshop-Floor Network Schemes

The article analyzes the classification of the main electrical equipment of in-plant power supply schemes, namely, fuses, switches and packet switches. The laws of change of probabilistic characteristics of reliability of the studied devices, as well as cable lines on the basis of statistical data on operation are determined. To determine the laws of change of reliability parameters of electrical equipment of the systems of intra-floor power supply, the study of theoretical and statistical functions of probability of failure-free operation and probability of occurrence of failure of each type of investigated electrical equipment and cable lines has been carried out. The types of functions of change of the main reliability parameters have been determined and the corresponding graphical dependences have been presented. Comparison of the obtained results of the values of probability of failure-free operation with the requirements of GOST and passport values is carried out. The conformity of probabilistic characteristics of electrical equipment to the normal distribution law using Kolmogorov and Pearson criteria has been verified.