3SB 125

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Fuses play an important role in the application of electrical products and equipment. As a kind of fast-acting electric current interruption device, it has been widely used in various fields. Among them, 3SB 125 fuses are widely used in the application of motor starting, especially for starting AC single-phase and three-phase asynchronous motors. The following article will mainly introduce the application field and working principle of 3SB 125.

3SB 125 is composed of fuse link and box in series. When the line current is normal, its fuse link is in a good state, and the fuse link can carry the normal working current of the line. When the line current is abnormal (overload or short circuit) and exceeds the rated current of the fuse, the thermal energy generated by the increased current heats the fuse link. When the temperature rises to the melting temperature of the fuse link, the fuse link melts into foam, breaks the circuit, and plays a role in protection. In other words, 3SB 125 plays a current limiting and protection role when the current is too large, and works with automatic overload protectors to play a better protection role.

Usually, when the current of the line exceeds the rated value of the 3SB 125 fuse, the fuse will blow in a few seconds to several tens of second(s). Therefore, 3SB 125 fuses can play a current limiting and protection role in the application of motors, and can be used with automatic overload protectors. In this way, it can play a better protection role.

3SB 125 fuses are widely used in the application of motor starting. Especially in the application of AC single-phase and three-phase asynchronous motors, 3SB 125 fuse can be used as an overload and short circuit protection device. When the current increases, the proper heating and cutting action of the 3SB 125 fuse can protect the line branch and motor. At the same time, the time fuse has enough power to cut off the general peak current. In addition, in the application of single-phase motor starting, the 3SB 125 fuse has enough power to withstand the starting current.

In addition to motor starting applications, 3SB 125 fuses can also be used in automotive systems, AC electric power systems, household appliances, street lighting and other systems as overload and short circuit protection device. In these applications, 3SB 125 fuses can also provide current limitation and protection.

The working principle of 3SB 125 is mainly determined by the material and shape of the corresponding fuse link. Generally speaking, the fuse link of 3SB 125 is made of metal with high melting point and low coagulation temperature. In addition, the fuse link also has the characteristics of fast melting speed. When the current is too large, the fuse link melts and separates the total current into several currents, so that the current of each part of the line is lowered, so as to protect the line.

In summary, 3SB 125 is a kind of fast-acting electric current interruption device, which has been widely used in various application fields. Its application fields mainly include motor starting, automotive systems, AC electric power systems, household appliances, street lighting and other systems, which can play a role of current limiting and protection. Its working principle is mainly determined by the material and shape of the corresponding fuse link. When the current is too large, the fuse link will be melted, so as to protect the line by separating the total current into several currents.

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