A method to eliminate overheating of electrical contacts: invention patent 201010545987.7; method to eliminate overheating of electrical contacts: international patent PCT/CN2010/079856, which are all based on continuous exploration, repeated testing and continuous improvement in more than 40 years of production practice The theory of "Four Basic Principles" to solve the problem of overheating of electrical contacts and the technology of "six requirements" for electrical contacts that do not heat up (this article is omitted) are at the core. Fasteners" Chuan Kejian Zi [2011] No. 018, National Science and Technology Achievement Network No. 9512011Y0026 Science and Technology Achievements, is a one-time, complete elimination of electrical contact overheating accidents at home and abroad. (Technology, technology, means)

One of the methods is to replace the "standard bolt" connection and disassembly specified in the original national standard GBJ149-90 with the "non-heat electrical contact special fastener" integrating the theory, technology, and scientific and technological achievements of the "overheat electrical contact" Type electrical contacts. Under the condition that the opening distance is unchanged according to the national standard, after replacing the "standard bolts" with special fasteners "tailored" in various power systems, the metal fatigue of copper and aluminum is overcome, and the pressure is sufficient The effective current-carrying cross-sectional area of ​​the conductor (line) is more than 1.5 times, because the resistance is inversely proportional to the conductor cross-sectional area, the resistance at this type of electrical contact is less than the resistance of the conductor (line) of the same length, the electrical contact (connector) The temperature will not exceed the conductor (line) temperature. In particular, the unique concave design of the bolt head and nut is the key point where the temperature of the electrical contact is still lower than the temperature of the conductor (wire) under the dynamic and thermal stability.

The second method is to replace the “special fasteners for high-current overheating electrical contacts” on pages 16 and 45 of GBJ149-90. The operating unit reported serious overheating of “threaded terminals” "transformers, high voltage Terminals for electrical appliances and bushings" (GB5273-85). The electrical contact itself is unreasonable in its design and manufacturing. In addition to the insufficient effective current-carrying cross-sectional area, a copper tin-lined flat washer is added on each side of the connected conductor. This is a low-level error in basic theory and concept. After changing to special fasteners, copper conductive bolts and two enlarged, thickened, concave copper nuts can be directly connected to the aluminum bus bar, tighten the two copper nuts, and tighten with standard nuts to prevent loosening. Completely eliminate the overheating faults reflected by the operating unit, and no overheating accidents (power transformers and current transformers below 10KV 400KVA widely used in urban and rural areas, such so-called terminal blocks are commonly used in test equipment, and overheating faults are frequent.)

It is worthy of special reminder that some of the existing counterfeit and infringing so-called anti-overheat bolts, energy-saving electrical contacts, and special fasteners for electrical equipment flow through the power system. Those products that are not directly sold by Sichuan Renyi Electric Co., Ltd. We are not responsible for any problems in power production for counterfeit, fake and inferior products with the registered trademark "Renyi". Although some products have enlarged and thickened bolts and nuts, they also imitate the unique concave design, but the manufacturers and sellers themselves can't tell their dynamic and thermal stability. Whether it is invention patents or scientific and technological achievements, utility model patents are protected by bolt heads. Nuts are enlarged and thickened, especially the unique concave design. Please pay attention to the identification of power systems and power customers. Reporting telephone number: 028- 83669117, or directly contact the local industry and commerce department to jointly safeguard intellectual property rights, report rewards!

However, the purpose of the promotion of the special fastener series for thermal electrical contacts is to make the temperature of electrical contacts (joints) lower than the temperature of their conductors (wires) by more than 5%. From education and training, design and manufacturing, installation and inspection, the "Basic Principles" and "Six Requirements" use invention patents and scientific and technological achievements, make all electrical contacts into "overheating" type at one time before powering on, gradually transform the original "overheating" type power system, and finally eliminate electrical contact overheating accident. It is by no means simply replacing a few bolts. In particular, please pay attention to the production, biotechnology, safety supervision, training, material supply and other functional departments in various power systems, and pay special attention to prevent unconscious use of counterfeit products. Let us Work together to do a good job of "eliminating overheating accidents of electrical contacts" of "infinite merit"!