Determination of the transition resistance of detachable electrical contacts with Camital active grease

Problem. The reliability of detachable electrical contact connections is significantly reduced due to an increase in transition electrical resistance caused by thermomechanical deformations, oxidation of contact surfaces, and a decrease in the effective contact area during operation. According to the results of operational and experimental studies, failures associated with contact degradation account for up to a third of the total number of electrical installation failures. Traditional methods, in particular the use of passive conductive lubricants, mostly only slow down oxidation processes and do not ensure active restoration of the contact condition. In this regard, it is important to develop models and technical solutions capable of describing and ensuring the stabilisation of the transition resistance of electrical contacts through controlled thermomechanical processes in the contact zone. Goal. To establish the regularities and interrelationships of processes in electrical contacts through experimental research and mathematical modelling of the evolution of the transition resistance of contact connections with composite grease modified with Cu–Al–Mn (Camital) with shape memory