company news about What is the significance of studying the temperature of the fuse?

What is the significance of studying the wire in the fuse?

The definition of warm rise is that under a certain current, the surface temperature of the fuse after the thermal balance is achieved and the initial temperature of the power power (can be understood as the ambient temperature), that is, the temperature of the temperature = the surface temperature of the fuse -ambient temperature.

The temperature rise of the fuse refers to the appreciation of the temperature of the fuse when flowing through the specified current in the fuse, that is, the measured temperature minus the value of the ambient temperature. The IEC standard specifies its upper limit at 135 ° C, and the UL standard specifies its upper limit at 75 ° C. Because the fuse's melt is more sensitive to temperature, under the action of a certain temperature for a long time, its melting point and impedance will change, which will affect the accuracy of the fuse. This is usually the fuse aging. The aging fuse is very dangerous to use in the circuit, so we should pay attention to the temperature rise of the fuse when making and using the fuse. In the same way, we should also notice that even after a long period of use, the fuses have not been disconnected, it may have been aging. It is best to replace it at this time

We are company generally need to ask customers if they have specific temperature rise requirements for fuses. For manufacturers of charging piles, if customers do not have specific requirements, we all achieve 70K temperature rise.