According to the "four basic principles" theory of eliminating overheating of electrical contacts, and the technology of "six requirements" for overheating electrical contacts, and the scientific and technological achievements of overheating electrical contacts, a patented invention is used to eliminate overheating of electrical contacts. The method is to use special fasteners for overheating electrical contacts when connecting and disassembling electrical contacts. For electrical equipment entry and exit joints, copper and aluminum busbars and corresponding multi-strand conductors, the opening and hole spacing of the cable crimping equipment clamps, Be sure to pay attention to it during design, manufacturing, installation, overhaul, and technical transformation.

—Use special fasteners for overheating electrical contacts to connect the openings and hole distances of detachable electrical contacts

The unit in the table is mm

Note: According to one of the "Four Basic Principles", the effective current-carrying cross-sectional area is the basis for the electrical contact's "overheating" (the temperature of the electrical contact does not exceed the conductor (line) temperature, and must be less than 5% for overheating electrical Contact) The size of the opening directly affects the effective current-carrying cross-sectional area. For this reason, when a special fastener is used for connection, the diameter of the opening is equal to the outer diameter of the fastener. For example, M12 drilling Φ12mm, considering the installation error, when opening two The hole size can be 12.5 mm, and the square hole size can be 13 mm. It should be based on the diameter after drilling. In particular, because the drill bit is ground irregularly, the hole diameter will exceed the drill bit's specification by 1 to 2 mm, and even irregular round holes will affect the effective current-carrying cross-sectional area.

2. Remember not to increase the aperture and open long strip-shaped holes for the convenience of installation, and then use special fasteners for overheating electrical contacts to connect the electrical contacts are all of the "overheating" type, and special attention should be paid when designing, manufacturing, and installing .

3. The special fastening of all detachable electrical contact couplings must be steel "special fasteners for overheating electrical contacts", and stainless steel can be used outdoors. What kind of copper and aluminum alloy bolts should be used in Articles 2, 3 and 10 of the national standard GBJ149. It is also believed that the electrical contacts are overheated due to oxidation corrosion. The transition between copper and aluminum is not a way to completely eliminate the overheating of the electrical contacts. The key problem is that they have not found The reason for "overheating", let alone grasping the "main contradiction" of overheating (academic discussion and debate can be conducted)

4. The contact surface of the electrical contact cannot be embossed on the surface, and the surface of the aluminum material does not need to be tinned. The oxide film on the surface is removed before installation and tightening, a thin layer of power compound grease is applied, and the special fasteners (8-10PMa) and The temperature of the electrical contact such as the anti-loosing spare standard nut is still lower than the temperature of its conductor (wire) when it is moving and thermally stable.

5. When the handover between Party A and Party B is completed, several similar electrical contacts can be selected for a temperature test of 1.5-2 times the rated current.