In various (a) power systems for power generation, supply and use, the electrical contacts (joints) whose temperature is higher than that of other conductors (wires) are "overheated". The real reason is definitely not history, tradition, or habit. Wrongly believed that it was caused by oxidation and corrosion (chemical, electrical corrosion)!

Used after more than 40 years of continuous exploration, repeated testing, and continuous improvement: "Research on overheated electrical contacts, special fasteners for overheated electrical contacts" Chuanke Jianzi [2011] No. 018, National Science and Technology Achievement Network 9512011Y0026 Number of scientific and technological achievements; the theory of "four basic principles" to solve the overheating of electrical contacts, and the technology of the "six requirements" for overheating electrical contacts; (please visit www.China Renyi Electric.cn, / overheating electrical contacts. cn/任义.cn query) and international and invention patents: Methods to eliminate overheating of electrical contacts PCT/CN2010/079856, 201010545987.7. It is not difficult to clarify and restore the "overheating" of electrical contacts.

The truth is that the metallic fatigue of electrical contacts (fasteners) is the "main contradiction" that causes electrical contacts to "overheat"; it causes the pressure on the contact surfaces of electrical contacts to decrease, making the effective interception area smaller than its Conductor (line) cross-section, the electrical contact (joint) resistance is greater than the resistance of the conductor (line) of the same length, which is the "cause" of the electrical contact (joint) "overheating"; it is precisely because of the copper and aluminum metals If the temperature of the electrical contact is higher than the temperature of its conductor, the electrical contact is overheated and the contact surface of the electrical contact is oxidized and corroded. Talking about chemical and electrical corrosion will cause electrical contacts to "overheat" improperly. Oxidation and corrosion are just "surface phenomena" that we see after "overheating" failures and accidents! And electrical contacts (connectors) The "overheating" electrical contact (joint) with a temperature lower than 5% of its conductor (line) temperature will not oxidize or corrode in the contact surface of the "overheated" electrical contact (joint)! (Welcome to the Sina blog and the Internet Academic discussion, debate)

As early as the end of the last century, we have already dealt with GW4-35/2000 isolation switches and bolt-type equipment clamps, as well as the "overheating" faults and accidents of threaded terminals in GBJ149 international, from oxidation and corrosion. Under the cover of "surface phenomenon", the "cause" and "main contradiction" of "overheating" were found. As long as the "main contradiction" of electrical contact overheating is grasped, the "metal fatigue" is reduced and overcome, and the "effective intercept area" with sufficient contact surface pressure is larger than the electrical contact (joint) more than half of its conductor (line) , Even under dynamic and thermal stability, the temperature of the electrical contact (joint) is lower than the temperature of its conductor (line). This is not difficult to understand, you should believe it!

Now let’s look back and look at it for decades. We believe in theory and concept that oxidation and corrosion will cause the electrical contacts to “overheat”. The technology and methods are tin enamelling and electrical compound grease coating, especially copper-aluminum transition and contact. The surface embossing process, etc., has no practical significance in solving the overheating of electrical contacts, and it can not cure the cancer of electrical contacts "overheating". And how helpless it is to take infrared temperature measurement, strengthen surveillance, prevent the situation, and make up for it. Strictly speaking, it is a mistake in the starting point, direction, and road. The theoretical and conceptual change from "overheating" to "overheating" is itself a revolution!

The reason is clear, and it can stand the test of practice. There are also a series of "special fasteners for electrical contacts" produced by the theory and technology of "overheating" electrical contacts. Electrical equipment is used in many provinces and cities across the country. "Network operation" among departments and some users has been proved by nearly ten years of history. After these three steps, it can be said that the comprehensive promotion of the scientific and technological achievements of "overheating" electrical contacts is the only way to eliminate the "overheating" of electrical contacts. As long as we change the theory and concept from "overheating" to "overheating", it will be a piece of cake to completely eliminate the overheating accident of electrical contacts in technology, process and methods!

In the end, it should be specifically stated that for: the electrical contact is weak, which is an important part of overheating; oxidation and corrosion will cause the electrical contact to "overheat" and other theories and concepts, and under the guidance of this set of theories and concepts, dozens of In the past years, the methods of solving the "overheating" of electrical contacts have adopted "temporary measures but not the root cause", infrared temperature measurement, enhanced surveillance, "prevention first" or the so-called "remedy", all of which are "continuously repeating past mistakes". After the cancer of "overheating" of electrical contacts of various types (a) of the power system cannot be cured, these types of accidents are classified as "equipment accidents". For example, electrical fires say that insulation aging, overload, short circuit, and automobile fires are also " Spontaneous combustion has made electrical contacts "overheating" almost a "trend" and "fashion". All this is formed by history, tradition and habit. The State Council, all relevant ministries and commissions, all electric power scientific research units, including individuals who formulate national standards, regulations, and college and secondary school textbooks are not involved. They understand the actual situation of electrical equipment after many years of operation. It is impossible to know the cause of "overheating", and there is no responsibility . To clarify and restore the truth of "overheating", this involves all fields and industries, including the lives and property and safety of each of our citizens who use electricity. Each of us has the responsibility and obligation to completely correct this history, tradition, and habit. The mistake! Let us work together to do this great deed of "unlimited merit"!