Their common feature is that they can all achieve short-circuit protection. The principle of a fuse is to use current to flow through the conductor, causing it to heat up. After reaching the melting point of the conductor, the conductor melts, so disconnecting the circuit protects electrical appliances and circuits from being burned out. It is an accumulation of heat, so overload protection can also be achieved. Once the melt burns out, it needs to be replaced. A circuit breaker can also achieve short-circuit and overload protection for circuits, but the principle is different. It achieves circuit breaker protection through the bottom magnetic effect of the current (electromagnetic release), and overload protection through the thermal effect of the current (not fusing, and there is often no need to replace components). In practice, when the electrical load in the circuit approaches the load of the fuse used for a long time, the fuse will gradually heat up until it blows. As mentio
(1) Precautions for using fuses: ① The protective characteristics of the fuse should be compatible with the overload characteristics of the protected object. Considering the possible short-circuit current, a fuse with corresponding breaking capacity should be selected. ② The rated voltage of the fuse should adapt to the line voltage level, and the rated current of the fuse should be greater than or equal to the rated current of the melt. ③ The rated current of each level of fuse melt in the circuit should be matched accordingly, and the rated current of the previous level of melt must be greater than the rated current of the next level of melt. ④ The melt of the fuse should be matched according to the requirements, and it is not allowed to arbitrarily increase the melt or use other conductors to replace the melt. ⑵ Fuse inspection: ① Check whether the rated values of the fuse and melt match the protected equipment. ② Check the appearance of the fuse for damage or deformation,
In low-voltage distribution systems, fuses are a type of electrical appliance that plays a safety protection role. Fuses are widely used for power grid protection and electrical equipment protection. When a short circuit fault or overload occurs in the power grid or electrical equipment, they can automatically cut off the circuit to avoid damage to electrical equipment and prevent accidents from spreading. A fuse is composed of an insulation base (or support component), contacts, melt, etc. The melt is the main working part of the fuse. The melt is equivalent to a special section of wire connected in series in a circuit. When a short circuit or overload occurs in the circuit, the current is too high, and the melt melts due to overheating, thereby cutting off the circuit. Melts are often made into filaments, grids, or sheets. Melt materials have the characteristics of relatively low melting point, stable characteristics, and easy melting. Generally, lead-tin alloy, silver plated co
The rated current of the melt is not equal to the rated current of the fuse. The rated current of the melt is selected based on the load current of the protected equipment. The rated current of the fuse should be greater than the rated current of the melt and determined in conjunction with the main electrical appliance. The fuse is mainly composed of three parts: the melt, the shell, and the support, among which the melt is a key component that controls the fusing characteristics. The material, size, and shape of the melt determine the fusing characteristics. Melt materials are divided into two categories: low melting point and high melting point. Low melting point materials such as lead and lead alloys have a low melting point and are prone to melting. Due to their high electrical resistivity, the cross-sectional size of the melt produced is larger, and the metal vapor generated during melting is more. They are only suitable for fuses with low breaking capacity. High melting poin
A temperature fuse is a circuit breaker that uses the heat generated by itself to melt the melt after the current exceeds a specified value for a period of time, thereby causing the circuit to disconnect; A current protector made using this principle. Fuses are widely used in high and low voltage distribution systems, control systems, and electrical equipment. As short circuit and overcurrent protectors, they are one of the most commonly used protective devices. A fuse is an overcurrent protector. The fuse mainly consists of parts such as melt, melt tube, and external filler. When in use, the fuse is connected in series to the protected circuit. When the current of the protected circuit exceeds the specified value and after a certain period of time, the heat generated by the melt itself fuses the melt, causing the circuit to disconnect, thus playing a protective role. Electrical appliances that use metal conductors as the melt to break the circuit are connected in series in the ci
Plug-in fuse The plug-in fuse can be divided into: ultra small plug-in fuse, small car fuse, medium car fuse, and large car fuse. The rated current ranges from 1-40 amperes (A) to larger sizes of 30-120 amperes (A), and the rated voltage is 32 volts (V). Fork bolt fuse The fork bolt type fuse can be divided into: small fork bolt type fuse and large fork bolt type fuse. The rated current ranges from 30-150 amperes (A) to large sizes of 40-800 amperes (A), and the rated voltage is 32/125 volts (V). Car glass tube fuse Car glass tube fuse can be divided into: 6.35 × 30mm glass tube fuse, 6.35 × 31.75mm glass tube fuse, 10 × 38mm glass tube fuse. The rated current ranges from 0.5 to 20 amperes (A) to 10 × 38mm20-80 amperes (A), rated voltage 32 volts (V).
MB:+86 13924633629 Ms.vicky
E-mail: waimao@xcfuse.com
Factory :
XC Electronics(Shenzhen)Corp.,LTD
Add: Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
Shenzhen branch: Shenzhen Xucheng Electronic Commerce co.Ltd
Add: 8-15 Jinyuan Industrial zone,Heao, Henggang, Shenzhen 518115,China
