Language: 熔断器 high voltage fuse fusibles de alta tensión Предохранитель высоковольтный الجهد العالي فيوز
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Plug-in fuse cutout: It is often used at the end of a line with a voltage level of 380V and below, as a short-circuit protection for distribution branch lines or electrical equipment.


Screw type fuse cutout: There is a fuse indicator on the upper end cover of the melt. Once the melt is blown, the indicator pops up immediately and can be observed through the glass hole on the ceramic cap. It is often used in the electrical control equipment of machine tools. Screw fuse. The breaking current is relatively large, and it can be used for short circuit protection in circuits with a voltage level of 500V and below and a current level of 200A.

Enclosed fuse cutout: Enclosed fuse is divided into two kinds of fuse and fuse without filler, as shown in Figure 3 and Figure 4. Filled fuses generally use square porcelain tubes with quartz sand and melt inside. They have strong breaking capacity and are used in circuits with voltage levels below 500V and current levels below 1KA. The unfilled closed fuse puts the melt into a closed cylinder with a slightly smaller breaking capacity and is used in power grids or power distribution equipment below 500V and below 600A.

Fast fuse cutout: Fast fuse is mainly used for short-circuit protection of semiconductor rectifier components or rectifier devices. Because of the low overload capacity of semiconductor components. It can only withstand a large overload current in a very short time, so the short-circuit protection is required to have the ability to quickly fuse. The structure of the fast fuse is basically the same as that of the filled closed fuse, but the melt material and shape are different. It is a variable cross-section melt with a V-shaped deep groove punched from silver sheet.

Self-resetting fuse cutout: Using sodium metal as the melt, it has high conductivity at room temperature. When a short-circuit fault occurs in the circuit, the short-circuit current generates a high temperature to quickly vaporize the sodium, and the vaporized sodium presents a high resistance state, thereby limiting the short-circuit current. When the short-circuit current disappears, the temperature drops and the metal sodium restores its original good conductivity. The self-resetting fuse can only limit the short-circuit current and cannot really break the circuit. The advantage is that the melt does not need to be replaced and can be reused.


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