1. When operating at a normal operating current of 25 ℃, the current rating of the fuse should usually be reduced by 25% to avoid harmful blowing. Most traditional fuses use materials with lower melting temperatures. Therefore, this type of fuse is relatively sensitive to changes in ambient temperature. For example, a fuse with a current rating of 10A is usually not recommended to operate at an ambient temperature of 25 ℃ and a current greater than 7-5A. 2. The voltage rating of the fuse must be equal to or greater than the effective circuit voltage. The general standard voltage rating series are 32V, 125V, 250V, and 600V. 3. The resistance of a resistor fuse is not important in the entire circuit. Since the resistance of a fuse with an amperage less than 1 is only a few ohms, this problem should be considered when using a fuse in a low-voltage circuit. Most fuses are made of materials with a positive temperature coefficient, so there are two types of resistors: cold resistance a
(Thermal Links), also known as: Temperature Control; It is a disposable element connected to the circuit with a very accurate and reliable temperature protection circuit. When the working environment temperature exceeds the rated temperature of the Thermal cutoff, the chemical heat sensitive bean in it will generate high temperature and quickly interrupt the circuit, avoiding the harm caused by overheating. After the temperature control fuse blows, it is necessary to manually replace it with a new one to restore normal operation of the circuit. Temperature control fuses are widely used in: microwave ovens, Water dispenser, disinfection cabinets, electric irons, toasters, barbecue machines, coffee makers, kettles, dryers, refrigerators, electric water heaters and other electrical equipment. The Thermal cutoff has the function of detecting abnormal temperature and cutting off the circuit. It can detect abnormal temperature rise of household or industrial electrical products and qui
1. When the melt melts, it is necessary to carefully analyze the reasons for the melting, which may include: (1) Normal fusing due to short circuit fault or overload operation; (2) If the melt is used for too long, it may break due to oxidation or high temperature during operation, resulting in changes in the characteristics of the melt; (3) There is mechanical damage during the installation of the melt, which reduces its cross-sectional area and causes accidental disconnection during operation. 2. When replacing the melt, it is required to: (1) Before installing a new melt, it is necessary to identify the cause of melt melting. If the cause of melting is not determined, do not replace the melt for trial delivery; (2) When replacing a new melt, check whether the rated value of the melt matches the protected equipment; (3) When replacing a new melt, it is necessary to check the internal burn condition of the fuse tube. If there are severe burns, the fuse tube should be replac
The same thing is that both can 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 the 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 mentioned ab
Precautions for using fuses: 1. The protective characteristics of the fuse should be adapted to 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. Inspection of fuses: 1. Check whether the rated values of fuses and melts match the protected equipment; 2. Check the appearance of the fuse for damage or deformation, a
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
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
