Julia

  Do you know the technical principles of vacuum bags? Vacuum bag  is a kind of packaging bag that we generally see in the market, and this kind of packaging bag is generally used in food, especially meat, instant food, and frozen food. Why is it more popular, and why are many items used for packaging? Vacuum bags have many advantages. Whether you shop online or in supermarkets, you will often see them. Why do many manufacturers choose this kind of popular packaging bag? Let's follow the editor of the vacuum bag manufacturer "Shanghai Yuhe Packaging Products Co., Ltd." to bring you in to find out. The main technical principle of the vacuum bag is to prevent the microorganisms of the items from growing and multiplying in the bag, and the technology inside is also adopted in a vacuum method, which is to prevent the items and food in the bag from oxidizing, that is, to prevent it from being damaged or rotted. , because generally speaking, food with more oil contains a large ...

  1.  What are the conditions for the parallel use of two generator sets ? What device is used to complete the parallel work?   Answer: The condition for parallel use is that the instantaneous voltage, frequency and phase of the two machines are the same. Commonly known as "Three Simultaneous". Use a dedicated parallel device to complete the parallel work. It is generally recommended to use fully automatic parallel cabinets. Try not to manually parallelize. Because the success or failure of manual parallelization depends on human experience. With more than 20 years of experience in electric power work, the author dares to say that the reliable success rate of manual paralleling of diesel generators is equal to 0. Never apply the concept of manual paralleling of the large mains power supply system to the small power supply system, because the protection levels of the two are completely different.   2. What is the power factor of the three-phase generator? Can a power ...