"Overheating" electrical contacts (joints) and historical, traditional, and habitually wrong electrical contacts (joints) are "overheated". The dividing line lies in the comparison of the temperature of the electrical contacts (joints) and their conductors (wires).

The temperature at the electrical contact (joint) is higher than (equal to) the temperature of its conductor (line), which is "electrical contact overheating". And the electrical contact (joint) temperature is lower than the conductor (wire) temperature by more than 5% is "not overheated electrical contact".

In order to ensure that after long-term operation, the temperature at the electrical contact (joint) is lower than the temperature of its conductor (line) under dynamic stability and thermal stability, we use 1.5-2 times the rated current during the test for half an hour In the rising current temperature measurement test, the temperature of the electrical contact is equal to the temperature of its conductor. We all regard it as "the electrical contact is overheated". The theory is clearer and the academic is stricter.

From the habitual mistake: oxidation and corrosion cause the electrical contacts to overheat and change to overheating. The contact surface of the electrical contacts (connectors) is not oxidized or corroded; from the traditional view: the contact part is the weak link in the circuit and the one that has overheated For key parts, after strengthening, let the effective current-carrying cross-sectional area of ​​the contact part be more than 1.5 times its conductor (line); from the original busbar connector (electrical contact), the contact resistance is generally specified to be no more than 20% of the resistance value of the busbar of the same length. The temperature of the electrical contact (joint) is more than 5% lower than the temperature of its conductor (line). The theory and concept of "not hot electrical contact" and "electric contact overheating" are completely different, with different starting points, directions, and paths. The change from the concept of "electrical contacts overheating" to "electrical contacts that are not too hot" is itself a "revolution." Please note that this is a green, theoretical and conceptual revolution in the field of science and technology. Do not regard "revolution" as a scourge.

To carry out the electrical contact revolution is to completely correct the historical and traditional "electric contact overheating" habitual error in various fields, industries, and various (a) power systems at home and abroad. The new way of "contact". Using the theory and technology of "not overheating electrical contacts", from education and training, design and manufacturing, installation and acceptance, all electrical contacts are made into a brand new power system of "not overheating electrical contacts" at one time before powering on, and one by one. Renovate the old system of the original "electric contact overheating", and strive to enter a new era of "overheating electrical contact" in a relatively short period of time.

Imagine from the hazards of overheating of electrical contacts in the previous blog post, if we can completely eliminate electrical equipment burnout, short circuit, and power failure accidents, to ensure reliable power supply. It can completely eliminate so-called equipment accidents such as "spontaneous combustion" caused by overheating of electrical contacts in vehicles such as airplanes, trains, and automobiles. It can completely eliminate electrical fires, ensure the safety of life and property of every citizen who uses electricity, and reduce the temperature of electrical contacts below the temperature of conductors. The country has fewer large power plants and "energy saving and consumption reduction" therefore has far-reaching significance. And doing all of this is a piece of cake for the scientific and technological achievements of "not hot electrical contacts". This is conducive to the development of the national economy and productivity, and is very significant for safety, economy, and social benefits. The scientific and technological achievements that have been explored from the production line and have been tested by multiple power departments and customers on the "online operation", the people The government should vigorously promote it. This is a practical matter of serving the people.

The scientific and technological achievements that have been explored, repeatedly tested, and continuously improved for decades: the theory, concept, technology, and method of "not hot electrical contacts" that have been proven by many years of history that make sense and can stand the test of practice , The craftsmanship proved to be indeed a great thing after these three steps: "Benefits in the present, merits in the future" and "Infinite merits". Eliminate electrical fires, sell less fire-fighting equipment, and increase productivity. A large number of electrical contacts are produced, and sales, maintenance, and employment of technicians will be affected (after the productivity is increased, you can rest three days a week in the future), but no matter from which aspect From the standpoint of common interests, it is only good for the country, the power system, and even every citizen who uses electricity! Revolution, progress, innocence!! Safe, energy-saving reasonable!!!

Sichuan Renyi Electric Co., Ltd.

Senior technician for substation maintenance: Ren Yi