A general fuse is composed of three parts: an electrode, a support body, and a melt, while an explosion-proof fuse also has an arc extinguishing device. This type of fuse not only protects the circuit with a high fault current, but also has a high voltage at both ends when the melt melts. Often, the melt has melted (melted) or even vaporized, but the current is not cut off. The reason for this is that at the moment of melting, under the action of voltage and current, Arc pulling occurs between the two electrodes of the fuse. This arc extinguishing device must have strong insulation and good heat absorption, and be negatively charged. The arc extinguishing equipment has a unique arc extinguishing ability. The most important arc extinguishing agent among them includes a composition composed of SiO2 and chloride salts. Because when using fuses, especially miniature fuses, when the fault current is too high or the short circuit is disconnected, a powerful arc will be generated on them
If the explosion-proof fuse is correctly installed in the circuit, the fuse will fuse and cut off the current when the current abnormally rises to a certain height and time, thereby protecting the safe operation of the circuit. Fuses protect electronic devices from current damage and can also avoid serious injuries caused by internal faults in electronic devices. Therefore, each fuse has a rated specification, and when the current exceeds the rated specification, the fuse will blow. When acting on a fuse between the conventional non fusing current and the rated breaking capacity current specified in relevant standards, the fuse should be able to operate safely without endangering the surrounding environment. The expected fault current of the circuit in which the fuse is installed must be less than the rated breaking capacity current specified in the standard. Otherwise, when the fuse blows, there will be continuous arcing, ignition, fuse burning, melting together with the contact,
Resistors and fuses are similar in material and construction, but their cost is reduced due to their dual function. Fuse resistors can be divided into: metal film fuse resistors, fuse type wound resistors, and fuse type cement resistors. There are several types of power: 1/4W, 1/2W, 1W, and 2W. As the power increases, the appearance size of the product will continue to increase. The resistance value of fuse resistance is generally small, mostly less than 1 ohm, and often acts as a sampling resistor in the circuit. At the same time, it plays a role in the occurrence of surges or other situations where large currents are generated and the circuit needs to be protected. Fusing causes the circuit to break and has a protective effect. At the same time, most of the fuse resistors are chip type, with relatively stable performance. They are commonly referred to as Jiebixin fuse resistors, which are also known as Jiebixin chip fuse resistors. There are two types of products: fast fuse and
According to size, it can be divided into small, medium, and large car fuses. The current includes: 1A, 2A, 3A, 5A, 7.5A, 10A, 15A, 20A, 25A, 30A, 35A, 40A, 50A, 60A, 80A, 100A; In plug-in car fuses, each color represents a different current of the car fuse. Certification includes UL, CSA, and ROHS. The types can also be divided into: MIN-N 2A Lt.grey, 3A Violet, 4A Pink, 5A Tan, 7.5A Brown, 10A Red, 15A Blue, 20A Yellow, 25A Natrual, 30A Green, 35A Pupel, 40A Orange/32V plastic zinc alloy 11x4x11mm ATY-N 2A Lt.grey, 3A Violet, 4A Pink, 5A Tan, 7.5A Brown, 10A Red, 15A Blue, 20A Yellow, 25A Natrual, 30A Green, 35A Pupel, 40A Orange plastic zinc alloy 19x5x18.5mm MAX-N 20A Yellow, 25A Natrual, 30A Green, 35A Pupel, 40A Orange, 50A Red, 60A Blue 70A Tan, 80A Natural, 100A Violet/32V
Fuses are the simplest protective devices used to protect electrical equipment from overload and short-circuit currents; Choose different types of high-voltage fuses according to installation conditions and purposes, such as outdoor drop type and indoor type. For some special equipment high-voltage fuses, special series should be selected; The fuse we often refer to is a fuse type. Nowadays, the Energy crisis and environmental pollution problems are increasing day by day, and the haze weather in a large area of the country has sounded an alarm bell for people. In terms of environmental pollution, the impact of cars cannot be ignored. Developing efficient, energy-saving, and zero emission clean electric vehicles has become an inevitable trend in the development of the automotive industry both domestically and internationally. In order to improve the power performance and range of electric vehicles, the voltage of the power battery pack of electric vehicles is increasing, reaching se
ISO-8820 and QC/T420-2004 standards define it as a fused protective device connected to a circuit that disconnects the circuit when the current exceeds the specified value and time. A fuse is a thermal response device, and the fuse or fuse in the fuse is made of a fusible alloy with high resistivity or a good conductor with a smaller cross-sectional area. In order to protect the wiring harness and other equipment, it is intentionally designed and manufactured as the weakest part of the circuit. Under normal working conditions, the fuse or fuse in the fuse will not blow; When a short circuit or severe overload occurs in the system, the fuse or fuse will immediately melt, thus protecting the circuit and electrical equipment In order to ensure the safe operation of the vehicle's electrical appliances and ensure the proper function of the fuse, it is particularly important to choose the appropriate type and specification. The selection of fuses involves the following factors: current
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