Language: 熔断器 high voltage fuse fusibles de alta tensión Предохранитель высоковольтный الجهد العالي فيوز
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The types of DC fuses can be divided into plug-in type, spiral type, non-filled closed tube type, filled closed tube type and fast fuse according to structure.

Plug-in means that the fuse of the fuse is fixed to the fuse holder in a plug-in manner, and in the event of a fault blow, only the melt can be replaced without having to disassemble the entire fuse. It is mainly composed of a porcelain cover, a porcelain seat, a moving contact, a static contact and a fuse. This is a more traditional fuse.

Spiral type refers to a type of fuse that is connected to the terminals on both sides of the fuse by screwing. It is mainly composed of a porcelain cap, a fuse tube, a porcelain sleeve, an upper terminal, a lower terminal and a carrier.

The non-filled closed tube type is a kind of fuse in which one or several pieces of melt are closed in parallel in one sleeve, and the weak part of the melt is designed as a melting point. It consists mainly of a fuse tube (fiber tube), a socket and a fuse. During use, such a fuse is required to be used as an insulation fixture when it is connected to the circuit.

A packed closed tubular fuse refers to a type of fuse that surrounds the melt in the closed tube body and is filled with treated quartz sand to accelerate the extinguishment of the arc. It consists mainly of tubes, indicators, quartz sand fillers and melts. The tube body is made of talc ceramic. When the fuse encounters a fault current blown, the indicator shows its blown state.

Fast-acting fuses emphasize the rapid response and provide electrical protection to the loop in the event of a short circuit. The basic composition of a fast-blow fuse is similar to that of a packed closed-tube fuse. The main difference is the material and specific structural design of the melt. Most of the fast-melting melts are silver or silver alloys. Various slits are designed on the melt sheet, and solder joints of other materials are added at specific positions. The purpose is to expect the heat to be concentrated in the design when the fault current occurs. Point to help to blow in a short time.