The difference between fast fuse and ordinary fuse

The structure difference between fast fuse and ordinary fuse

1. Ordinary fuse links are made of metal wires with certain geometric shapes.

2.The fuse of the fast fuse not only has a certain formed metal wire, but also has a solder joint of a certain material on the metal wire. The purpose of this is to make the fuse of the fast fuse occur in the circuit. It can reliably perform rapid disconnection under overload conditions.

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The function difference between fast fuse and ordinary fuse

1. The fuse of the ordinary fuse will have a certain let-through time when the circuit has a proper overload fault. To put it bluntly, the higher the actual passing current exceeds the rated current, the shorter the fusing time. Fast, on the contrary, if the value of the over-rated current is smaller, the time and speed of the ordinary fuse to perform the opening action is longer and slower.

2. We can see from the name that the fast fuse is characterized by a "fast" character, so the sensitivity is very high. Once the circuit current is overloaded, it will be under the action of the wire solder joint as mentioned before Quickly heat up, so as to achieve the effect of quickly disconnecting the fuse. The better the quality of the fast fuse, the higher its efficiency.

The sensitivity difference between fast fuse and ordinary fuse

1. The sensitivity of ordinary fuses is not very high, and ordinary fuses are usually used without special processing.

2. The quick-acting fuse has relatively high sensitivity and is generally used to protect semiconductor components, such as the quick-acting function before the inverter.

The difference between fast fuse and ordinary fuse

1. Ordinary fuses are mainly used to protect wires and cables.

2.Fast fuse is mainly suitable for protecting semiconductor equipment

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Characteristics of fast fuse

1. Current limiting characteristics

Because the internal melt of the fast fuse is a rectangular sheet with a series of round holes and narrow necks, and it is also filled with quartz sand arc extinguishing medium. Moreover, the cross-sectional area at the neck of the round hole is relatively small and the heat capacity is also small. Therefore, when a short circuit fault occurs in the line, it will be fused when the fault current does not reach the expected short circuit current value, which can not only play a limiting role It can also speed up the arc extinguishing work.

2. Strong breaking capacity

When a short circuit occurs, the neck of the round hole in the fuse will be the first to be blown, and the arc phenomenon will be divided into many small sections by the quartz sand medium, so that the arc can be quickly extinguished. Because the quartz sand material can have an insulating effect, the fast fuse immediately becomes an insulator after the arc is extinguished, breaking the fault circuit, and its breaking capacity can reach up to 50kA.

The above is the difference between fast fuse and ordinary fuse, hope to help everyone okplazas.com is a professional sales agent for fuse related products. Welcome to email: salesokplazas.com for consultation. You can also contact WeChat customer service +86-13689242098 online for product consultation!