ZAMAK is a family of alloys with a primary base metal of zinc and alloying elements of aluminium, magnesium and copper. Zamak alloys are part of the zinc aluminium alloy family. ZAMAK alloys are commonly used for Zinc Die Casting applications.It is applied to castings that do not require high mechanical strength, such as toys, lamps, decorations, and some electrical components. Die Casting is a metal casting process characterized by the use of a mold cavity to apply high pressure to the molten metal. Molds are usually machined from higher strength alloys, some of which are similar to injection molding.
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According to the provisions of GB50057 and GB50343, for special equipment that needs protection, the rated value of impact voltage (UW) should not exceed 1.5 kV. The corresponding power SPDs belong to Class C power protection with a current rating of 20kA to 40kA and a maximum continuous operating voltage of AC385V. For the protection of the charging pile, a professional charging pile power supply lightning protector can be used. This kind of lightning protection device generally has the following characteristics:
1. The critical control point of this type of lightning arrester is that the voltage protection level (Up) should be less than the UW design;
Second, the use of high-performance MOV, with high reliability;
Third, with work failure indication, optional remote alarm function;
Fourth, and the use of temperature control protection circuit, built-in thermal protection, automatic short-circuit failure device;
Fifth, the use of standard modular design, easy installation and easy maintenance. Can effectively protect the charging pile from lightning strikes. 
Charging characteristics of the special power supply arrester for charging piles
In recent years, with new energy and our lives getting closer and closer, new energy vehicles have also developed greatly, which requires a large number of charging needs. However, most of the charging piles are outdoors and are vulnerable to induced lightning surges. When subjected to a lightning strike, the electronic system and communication system of the charging pile can be easily damaged, which will result in the vehicle not being able to charge, or the vehicle being charged. This may have serious consequences, and the cost of post-maintenance is also considerable. Looking at the trend of automobile development, more and more electric vehicles will be used in the future. Charging piles will also develop along with it. Charging piles are an essential part of electric vehicles and cannot be neglected in safety maintenance. It is necessary to plan the installation of lightning protection facilities. In order to reduce the trouble of future maintenance, it is better to install special lightning protection devices for the charging piles to prevent losses caused by lightning strikes.