First, the selection of power lightning protection device 1, see the maximum continuous operating voltage The stability of the power supply SPD operation depends on the maximum continuous operating voltage value of the SPD, it is an important parameter related to the power SPD operation, in the choice of power supply When a surge protector is used, its maximum continuous operating voltage must not only meet the relevant standards, but also take into account the normal fluctuations that may occur in the power grid and the highest possible fault voltage that may occur.
2. Residual pressure selection The residual voltage of the power surge protector is not as low as possible. For varistor power supply surge arresters, the lower residual voltage usually means that the maximum continuous operating voltage is reduced. As a consequence, the lightning protection device may be damaged due to prolonged overvoltage.
3. Selection of alarm function It is very necessary to install a lightning protection device with alarm function. It can monitor the operation of the power supply lightning protection device. Once a damage situation occurs, the alarm device will be activated to achieve real-time monitoring. Know and replace the damaged SPD.
Second, the signal lightning protection device selection In the choice of signal lightning protection device, we must first understand the application of the occasion, in which the signal lightning protection many types, widely used, different places can apply different signal lightning protection devices, These include: telephone signals, network signals, video signals, analog signals, digital signals, control signals, combined signals, etc. Here, we need to pay attention to, some electronic products, both need power supply, but also need to transmit data, etc. It is very troublesome to install lightning protectors for every line. At this time, two-in-one lightning arrester or three-in-one lightning arrester can be used. This is convenient and also saves a lot of them. The trouble is safe and time saving.
Finally, when selecting the lightning arrester, we must also pay attention to whether the lightning protection products are recorded in the lightning protection center. Only the lightning protection products approved by the inspection department can be purchased. For non-recorded products that are not produced according to the law, do not purchase them. Kejia Electric reminded that to purchase lightning protection devices, we must choose products with brand protection to ensure safe use.
Screw and barrel are two essential components of plastic extrusion machines. They work together to melt and shape plastic materials into various forms. The screw is a rotating helical shaft that moves the plastic material through the barrel, which is a stationary tube. The screw and barrel are designed to work together to provide the right amount of heat, pressure, and shear to the plastic material. In this article, we will discuss the screw and barrel in detail and their importance in the plastic extrusion process.
The screw and barrel are essential components of plastic extrusion machines. They work together to provide the right amount of heat, pressure, and shear to the plastic material. The screw and barrel are designed to be precise and efficient, which results in high-quality plastic products.
The screw and barrel are also designed to be durable and long-lasting. They are made of high-quality materials that can withstand the high temperatures and pressures of the plastic extrusion process. The screw and barrel are also designed to be easy to clean and maintain, which reduces downtime and increases productivity.
Screw & Barrel,Extruder Barrel,Injection Molding Barrel,Extruder Screw Barrel
Shanghai Jiahao Machinery Manufacturing Co., Ltd. , https://www.jiahaoextruder.com