Question: What are the reasons for the burning/burning of the temperature fuse during the "life test"?
Answer:
(1) The most important thing is that the long-term use temperature is too high due to design reasons (such as too high power, too close design of heating element or temperature fuse, etc.). ) temperature fuse selection TF is too low, resulting in fusing;
(2) temperature fuse connection is not tight, such as terminal flushing is not tight or virtual welding, resulting in excessive resistance and high temperature superposition;
(3) The choice of temperature fuse only considers TF, not TH. Because life test is a long-term process, the service temperature exceeds TH, but does not exceed TF. The fuse doesn't need to be broken immediately, but it will melt slowly in a period of time (maybe tens of hours, maybe hundreds of hours), and eventually lead to burning. The design of the product is complicated, so it is best to have physical analysis. Generally speaking, these situations are more common;
