Fuses (fuse) means that when the current exceeds a predetermined value, the heat generated by itself to the melt blown off an electrical circuit. Fuse switch for some time after the value of its self-generated heat so that according to the current exceeds the melt melted, so that the circuit is disconnected; using a current protector made of this principle. Fuse switch are widely used in high and low voltage power distribution and control systems and electrical equipment, as a short-circuit and over-current protection, is one of the most common protection devices. Fuse switch from the base and the cover (load melting device) composed of two parts, fuses generally vertical fuse rail, was a three-phase parallel enclosed structure, positive operation, covered by a transparent cover plate can be fitted directly observed the fuse-rated pieces of data, and indicates the operating state, the switch can be equipped with NH000 or NH00 fuse two kinds of body sizes. Fuse switch has compact, safe, reliable, easy loading and unloading fuse body, feel the operating force is small.
Fuses mainly from the melt, the housing and bearing three parts, which is a key element controlling the melt fusing characteristics. Material, size and shape determine the melt fusing characteristics. Melt material is divided into two types of low melting point and high melting point. Low melting point materials such as lead and lead alloys, its low melting point easily blown, due to its greater resistance, so the larger cross-sectional dimensions made melt and fuse metal vapor produced when more capacity is only applicable to low-scoring off the fuse devices. Refractory material such as copper, silver, and its high melting point, is not easy to fuse, but due to its low resistivity, can be made of a low melting point melt-sectional dimensions smaller than, less metal vapor is generated when the fuse is suitable for high breaking capacity fuses. Melt into filamentous shape and strip two. Changing variable cross-section shape can significantly change the fuse characteristics.
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Fuses mainly from the melt, the housing and bearing three parts, which is a key element controlling the melt fusing characteristics. Material, size and shape determine the melt fusing characteristics. Melt material is divided into two types of low melting point and high melting point. Low melting point materials such as lead and lead alloys, its low melting point easily blown, due to its greater resistance, so the larger cross-sectional dimensions made melt and fuse metal vapor produced when more capacity is only applicable to low-scoring off the fuse devices. Refractory material such as copper, silver, and its high melting point, is not easy to fuse, but due to its low resistivity, can be made of a low melting point melt-sectional dimensions smaller than, less metal vapor is generated when the fuse is suitable for high breaking capacity fuses. Melt into filamentous shape and strip two. Changing variable cross-section shape can significantly change the fuse characteristics.
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