021801.6HXP

Fuses are one of the most common protection devices used in various electrical and electronic circuits, and 021801.6HXP is one kind of fuses. This type of fuse can be widely applied to many fields because of its reliable action characteristics and high breaking capability. Firstly, this article will analyze the application fields 021801.6HXP can be applied to. Then, based on the principle of current-limiting, the working principle of this fuse will be explained. 021801.6HXP is a type of current-limiting fuse. It is mainly applied to protect circuits against faults like overload and/or short-circuit. It is capable of protecting transformers, cables, motors, capacitors, switchgear and other connected equipments. Especially, it can be used in all kinds of power distribution and motor circuits with AC voltage up to 480 Volts and frequency up to 400Hz. 021801.6HXP has a wide range of intermittent current rating and breaking capacities, and these specifications can help the user to choose a suitable fuse for his own application. Furthermore, due to its reliable breaking characteristics, this type of fuse is also an ideal protection element in many circuit. The working principle of 021801.6HXP can be explained based on current-limiting theory. As it is known, during a system fault, a large current will flow through in the circuit. And this current is several times higher than the normal current of the system. Hence, this type of fuse is designed to detect and then break the abnormal large current in the system. Specifically, when a large current flows through the circuit, the heat energy created by this current will result in melting the metallic element inside the fuse. Due to its melting, an arc will be established between the part of the fuse which still remains and the contacts of the fuse. This arc will cause an additional impedance in the circuit, and then the current of the circuit can be decreased. When the arc current is lower than certain level, the arc can be interrupted and the current can be limited successfully. It is notable that the time parameters and current limiting capability of 021801.6HXP are mainly determined by the fixed length of the metallic element inside the fuse. Therefore, this type of fuse is called a “time-delay” fuse, because it requires a certain time to break the fault-caused current. As a result, the connected load are protected and can remain unharmed under the action of this fuse. To sum up, thanks to the reliable action and the high breaking capability, 021801.6HXP can be widely applied to many fields, such as power distribution and motor circuits. Its working principle is mainly based on the current-limiting theory, and this principle is responsible for protecting the connected load during a system fault.