What Are The Use And Maintenance Of Drop-out Fuses?

What are the maintenance and use of drop out fuse?

11 kv drop out fuse is a kind of electrical appliance that plays a safety protection role in the low-voltage power distribution system. 11kv drop out fuse is widely used in power grid protection and power equipment protection. When a short circuit fault or overload occurs in the power grid or power equipment, the circuit can be automatically cut off to avoid damage to the electrical equipment and prevent the spread of the accident.

11kv drop out fuse manufacturer is mainly composed of three parts: melt, shell and support. The melt is the key component to control the fusing characteristics. The material, size and shape of the melt determine the fusing characteristics. The melt material is divided into two categories: low melting point and high melting point. Low melting point materials such as lead and lead alloy have low melting points and are easy to melt. Due to their high resistivity, the cross-sectional size of the melt is large, and more metal vapor is generated when melting. It is only suitable for 33kv drop out fuse with low breaking capacity. High melting point materials such as copper and silver have high melting points and are not easy to melt. However, due to their low resistivity, they can be made into smaller cross-sectional sizes than low melting point melts. Less metal vapor is generated when melting, which is suitable for 33kv fuse with high breaking capacity. The shape of the fuse is divided into two types: wire and ribbon. Changing the shape of the variable cross section can significantly change the fusing characteristics of cover drop out fuse. drop fuse has various different fusing characteristic curves, which can be applied to the needs of different types of protection objects.

drop fuse cutout is composed of an insulating base (or support), a contact, a fuse, etc. The fuse is the main working part of drop out expulsion fuse. The fuse is equivalent to a special wire connected in series in the circuit. When the circuit is short-circuited or overloaded, the current is too large, and the fuse melts due to overheating, thereby cutting off the circuit. The fuse is often made into a wire, a grid or a sheet. The fuse material has the characteristics of relatively low melting point, stable characteristics, and easy to fuse. Generally, lead-tin alloy, silver-plated copper sheet, zinc, silver and other metals are used. In the process of the fuse fusing and cutting the circuit, an arc will be generated. In order to extinguish the arc safely and effectively, the fuse is generally installed in the drop out fuse 22kv shell, and measures are taken to quickly extinguish the arc.

drop out fuse 33kv has the advantages of simple structure, easy use, and low price, and is widely used in low-voltage systems.