In various (units) power systems from power generation, power supply to the end of power consumption, the contact part of the electrical contact (joint) is the weak link in the circuit and an important part of overheating. "Overheating means that the temperature of the contact part of the electrical contact is higher than the temperature of its conductor (line). Higher than its conductor (line) is regarded as the definition of "electrical contact overheating"!

On the contrary, the temperature of the contact part of the electrical contact is lower than the temperature of its conductor (line), and the temperature lower than the conductor (line) should be considered "overheated"! Say that the temperature of the contact part is lower than that of the conductor (line). , Is "not too hot electrical contact", this definition holds!

For decades, the historical habitual mistake has been that: the contact part of the electrical contact is the weak link in the circuit, and an overheating failure occurs in this part, and accidents are inevitable, and even that countless electrical contacts have some overheating accidents. It is normal. If this type of accident does not occur, such a large number of repairs, especially the 95598 accident repair personnel who have nothing to do, will not lose their jobs. Electrical equipment is not broken for a long time, isn’t the business of manufacturing electrical equipment less? Under these theories and concepts, under this "trend", we propose that the temperature of the contact part of the electrical contact is lower than the temperature of its conductor (line), For the theory of "not hot electrical contacts", technology seems to have violated the system "major taboo"! It's not in line with the "trend"!

In addition, there are people who use electric current to pass through the conductor, and the electrical equipment will generate heat. Exceeding the regulations is "overheating". It is used to infer and confuse the concept that the temperature of the contact part of the electrical contact is lower than the temperature of its conductor (line), which is "not too hot electrical contact". In essence, it is caused by not jumping out of the habitual error cycle of "electrical contact overheating". It seems that to promote the theory and technology of "not hot electrical contacts", and to carry out this "revolution", it is impossible not to involve the ideological field. The most difficult thing is probably the "concept change".

It is necessary to understand again that the theory of "overheating of electrical contacts" and "overheating of electrical contacts" is completely different. The dividing line is that "overheating" means that the temperature of the contact part is higher than the conductor (line). "Overheating" is on the contrary lower than the conductor (wire) temperature, which is theoretically "revolutionary". Of course, in terms of technology, we have adopted "improved" methods, which are suitable for national conditions and system status, and are convenient and feasible. And immediate results, once and for all.

For many years, overheating of electrical contacts has caused various types of power systems to suffer. This is a cancer. The temperature of the contact part of the electrical contact (connector) is lower than the temperature of the conductor (wire). Isn't the theory and technology of "not hot electrical contact" the cure for this cancer?

Senior Technician of Transformer Overhaul Ren Yi