Study of Reliability and Efficiency of Workshop Power Supply System Electrical Apparatuses

The effectiveness of low-voltage switching devices installed in the workshop networks of industrial enterprises is studied. To assess the reliability parameters of low-voltage devices, it is proposed to use a statistical method and an analysis of the physical processes occurring in contacts and contact connections. To obtain a more reliable assessment of the device failure rates, it is proposed to use correction factors that take into account the influence of the main factors relating to the electrical equipment operation. The maximum allowable contact heating temperature and the probability of their trouble-free operation are adopted as the apparatus operation effectiveness criteria. The switching device operation quality may degrade during its long-term operation. This may be due to unreliable operation of the apparats itself, as well as possible assembly defects. The average assessment of possible damage makes it possible to determine the costs caused by unreliable operation of the devices and to revise maintenance regulations.