Why can't copper wire replace fuse?
The resistivity of copper wire is small, and it is difficult to fuseThe fuse wire by the resistivity is relatively large and lead antimony alloy with low melting point made is called the fuse. The fuse is also known as the fuse, the IEC127 standard defines it as "fuse (fuse-link)". It is a kind of installation in the circuit, to ensure the safe operation of the electrical circuit components.
It was originally used to protect the incandescent lamp expensive. Fuse protection of electronic devices from the current damage, also can avoid serious damage caused by internal faults of electronic equipment. Therefore, each fuse is rated specifications, when the current exceeds the rated specifications when the fuse will fuse. When provisions between conventional fuse current with the relevant standards of the rated breaking capacity (current) between the current acting on the fuse, the fuse should be to the satisfaction of action, and will not endanger the environment. The expected power failure circuit fuse placed flow must be less than the standard rated breaking capacity current, otherwise, sustained arcing, ignition and the fuse burned, together with contact with melting, marking and other phenomena will be unable to identify the fuse fuse when the fault occurred. Of course, the inferior fuse breaking ability Does not meet the standard requirements, the use of the same hazards
When a fault or abnormal circuit, with the current increasing, and increase the current may damage the circuit in some important devices or expensive devices, there may even cause a fire burned circuit. If the circuit correctly placed the fuse, the fuse will be so in the abnormal current increases to a certain height and a certain when the fuse cut off the current, thus play a role in the safe operation of the fuse protection circuit. The invention of the first more than 100 years ago by Edison, due to the time of the industrial technology developed incandescent lamps are very precious,
