Industry status
Leading industry in design: The socket button switch pioneered by Bull more than ten years ago has been imitated by other domestic socket brands and has become the general standard of high-quality socket products in today's market.
Leading technology industry: 1996, Bull pioneered the socket button switch and won more than 90 national patents. In 2007, Bull, as the main supporter and drafter of the new national standard for power converters, proposed a higher-performance combined hole standard, which was not only recognized by relevant national institutions and authoritative experts, but also successfully included in one of the new national standards for socket industry.
Production label
First, observe the power cord. The lower socket feels soft, has poor toughness and poor connection. The copper core in the power cord is made of inferior material, with small cross section, many impurities, low melting point and easy disconnection. Low strength, low toughness and strength failure. The power cord of high-quality socket, such as bull socket, is hard and soft, and the connection is firm and reliable. Double-layer insulated wire can effectively prevent leakage. The copper core in the power cord is made of high quality material, which has low calorific value and good conductivity to ensure the safety of electricity use.
The second point is to observe the plug. The lower socket is usually a bipolar plug, which has poor safety and too thin pins. Long-term use is easy to deform and move. The high-quality socket is a three-pole plug, which effectively resists electric shock and has high hardness. Long-term use, no deformation. Take the bull socket as an example. Because the high-quality copper plate is plated with nickel, its thickness is thick, so it has low calorific value and good conductivity, which can effectively prevent copper rust and is not deformed after 1000 drop tests. It is safer and more durable.
The third point is the test switch. The switch of inferior socket feels bad, and it is not smooth to press, which is easy to jam; High-quality socket switch not only has good flame retardancy, safe use, stable pressure and long service life. For example, the cow socket switch is made of PC alloy material, which has good flame retardancy and has been tested for more than 20 thousand times. Excellent quality and more reliable safety performance.
The fourth point is to observe the internal copper parts. Observing the internal copper parts from the socket, the copper parts of the lower socket are ordinary brass, which has no surface treatment, soft texture, poor toughness and easy oxidation corrosion. Poor contact between the plug and the internal copper parts will affect the plugging and unplugging strength. High-quality sockets, such as bull sockets, have thick inner copper and nickel plating, which can effectively prevent copper from rusting, not only with less heat, but also with good conductivity. Excellent elasticity, good plugging and unplugging performance, and no looseness after normal plugging and unplugging for 5000 times.
Fifth, observe the shell and jack panel. Inferior sockets are made of ordinary engineering plastics, which not only have rough workmanship, dull luster and burrs, but also have poor temperature resistance and low flame retardant ability, and are easy to soften and deform after long-term use; High-quality sockets, such as Bull Socket, not only have well-made shell surface and high gloss, but also have no burrs and gaps in parts matching, and the jack panel is made of PC alloy, which has strong flame retardant performance and does not burn at 750℃.
The above is the whole content of Bian Xiao's Introduction to Beef Cutting.