What are the differences between quick fuse and ordinary fuse? With the rapid development of industry, power grid, new energy, rail transit and other industries have very high requirements for circuit protection, and traditional fuses have been unable to adapt to high-quality and high-strength circuit protection. The secondary makes the demand for fuses rise sharply, and fuses are widely used in the new energy and rail transit industries that have risen in recent years and are safer. Here we introduce the difference between fast fuses and ordinary fuses.
Functional difference
From the point of view of their function, the ordinary fuse will have a certain allowable passing time under the appropriate overload condition, until the actual current exceeds the rated current value, the fusing time will be shorter; On the contrary, the smaller the more rated fusing current, the longer the fusing time will be. The fast fuse is to highlight "fast", that is, high sensitivity. In the circuit current overload, the fuse can quickly heat and quickly disconnect the fuse under the action of the solder joint, and some good fast fuse body has a particularly high efficiency, often used to protect thyristor and some electronic components.
2. Use differences
The difference in reuse between the two is mainly based on the previous two points as the premise to be established, because of the high sensitivity of the fast fuse, so it is usually used to protect the front of semiconductor components, such as frequency converters. Relatively speaking, the sensitivity of ordinary fuses is relatively low, and can only be used as ordinary fuses, and at the same time, it can not meet its needs in some conditions, so only fast fuses can be used.
3. Shape difference
In the past, the ordinary fuse is composed of some metal wire with a certain geometric shape, and the fuse of the fast fuse in addition to containing a certain shape of the metal wire, but also can be added to some specific materials of the solder joint, the purpose of doing so is to allow the fuse to react quickly in the case of overload.
It is worth noting that in general, when we choose a fuse, the rated voltage of the fuse is greater than or equal to the rated voltage of the circuit. The rated current of the fuse should be selected according to the load. For example, fuses used to protect lighting and electric motors are considered for their overload protection, which requires a smaller melting coefficient of the fuse. The protection fuse used in the low-voltage power supply line in the workshop is to consider its breaking capacity when it is short circuited. What are the differences between fast fuses and ordinary fuses? All the content, I hope to help you.