Independent innovation and completely independent intellectual property rights, but thermal electric contact theory and technology

Press: 1. International patent: Method to eliminate overheating of electrical contacts PCT/CN20101079856

2. Invention patent: A method to eliminate overheating of electrical contacts 201010545987.7

3. Utility model patent: Special fasteners for electrical contacts that do not heat up ZL200920080297.1

4. Appraisal of scientific and technological achievements: Research on electric contacts that are not hot, but special fasteners for hot electric contacts.

Sichuan Branch Appraisal [2011] No. 018

5, National Science and Technology Achievements Network P512011Y0026

Combining the "four basic principles" theory of eliminating overheating of electrical contacts and the "six requirements" technology for overheating electrical contacts, a special fastening for overheating electrical contacts "tailored" for electrical connections of various (a) power systems Pieces.

Replace the "standard bolts" with special fasteners for overheating electrical contacts:

Rectangular aluminum bus bar 60×6=360mm2

Replaced with two electrical contacts connected by special fasteners, effective current-carrying cross-sectional area 445mm2×2=890mm2

According to the "Four Basic Principles" and "Six Requirements":

The effective current-carrying cross-sectional area of ​​890 mm2 is far greater than 1.5 times the cross-sectional area of ​​its aluminum bus bar.

The special fastener wrench 27 has a longer force arm than the original 19 wrench, and can be tightened when tightening.

Because the resistance of such electrical contacts is lower than that of aluminum bus bars, the temperature at the electrical contacts is lower than the bus bar temperature, and the effective current-carrying

The area will not be oxidized or corroded. When the short-circuit current passes, the thermal stability is good, and the temperature of the electrical contact is still lower than the bus temperature.

The calculated effective current-carrying cross-sectional area is the part that is compressed by special steel fasteners for a long time. The fatigue strength of steel in the middle and two circles is far better than that of copper and aluminum. Therefore, the electrical contact can maintain an effective current-carrying cross-sectional area of ​​890mm for a long time.

Due to the unique concave design of the enlarged and thickened bolts and nuts, the electrical contact has superior dynamic stability. The short-circuit current flows through 890mm in 4 seconds.

electrical contacts, the heat dissipation here is always faster than its 360mm aluminum busbar.

Tested with a current of 1200A, after 30 minutes, the temperature at the electrical contact was nearly 20% lower than the conductor.

in conclusion:

The four basic principles (theories), six requirements (technologies), inventions, and utility model patented technologies are all combined. However, the special fasteners for thermal electrical contacts replace the "standard bolts", which can solve these electrical contacts at one time. The old problem of overheating. It is better to use this type of electrical contact when newly installed! It is also very convenient to overhaul, technical modification and replacement, and it can be reused.

Sichuan Renyi Electric Co., Ltd.

Address: No. 128, Hongyang East Road, Qingbaijiang, Chengdu