The role of wrist strap
Many people feel very strange when they first touch the electrostatic bracelet, which is to wear to reduce the accumulation of static electricity, but why should we add a megaohm resistor to slow down the electrostatic discharge? Isn't the faster the release, the better? Today we take this question to see some basic knowledge that the industry has come into contact with. What is an electrostatic bracelet? In fact, the electrostatic wristband is our anti-static wrist strap, which is just a different name. Anti-static wrist strap is an anti-static elastic band, active snap button, spring cord. Protective resistors and plugs or collets form an anti-static product. Why do we wear such an anti-static wrist strap? Because the object and the object rub against each other, it will generate static charge. In the process of accumulation, the static charge will generate potential energy, which is the voltage we often say. In the production process, if the electrostatic voltage builds up too high, it will form an electrostatic discharge phenomenon, and some of our capacitors will be directly broken down, which will cause a large number of defective products to appear, resulting in unnecessary losses. When we wear these anti-static wrist straps, static electricity is transferred from the product to the hand, and then transferred to the grounding wire through the wrist strap, so that static electricity can not accumulate, thus avoiding some damage caused by static electricity. Then why do we have to add a megaohm resistor to the cable of the wrist strap? In fact, this megaohm of resistance, we call protection resistors. Why is it called a protection resistor? What to protect? In fact, we need to protect workers. If we use a non-resistive anti-static wrist strap, then when our workers accidentally get an electric shock, it is equivalent to forming a current path, which will cause physical damage to our workers and even death. But when we add a megaohm protection resistor, then when our workers accidentally get an electric shock, this protection resistor is equivalent to our human body in series to form a very large resistance, the current that will pass our body will The lowest, then the damage to our body will be minimized. In the end, adding a one-megaohm protection resistor to the electrostatic wristband is to reduce the loss in the production process while protecting our personal safety.
