Research Resistance Contact Connections of the Low Voltage Switching Equipment and the Network Equivalent Resistance

Low voltage apparatus engineering has been developing quite intensively lately. Switching devices are constantly being improved and developed, new directions appear, based on the use of non-traditional principles of operation. And this leads to stringent requirements for stability and the level of resistance of contact joints. The paper presents a study of the resistances of the contact connections of switching equipment based on statistical information. Low voltage switching devices (magnetic starters, circuit breakers, contactors, etc.) are mass products, which have rather high requirements for their technical characteristics. One of these characteristics is the resistance of the contact connections of the devices. Due to the instability of the resistance of the contacts of electrical devices sensitive to the effects of many external factors, the pattern of its distribution is also unstable.