company news about Fuse blowing mechanism

Since the fuse has a certain fusing delay characteristic, why sometimes the system is normal, but the fuse blows instead?

There are three reasons:
1) The most common reason is that the type selection is unreasonable, and the rated current of the system is close to the rated current of the fuse, or even higher. This situation usually occurs for a short time and is easy to find.

2) When the system starts, a high pulse current flows through the fuse. This pulse current will cause the fuse to age. This happens for a long time, and the fuse occurs when the system starts.

3) The instantaneous surge current is too large, and the fuse is blown in a few microseconds. This situation is accidental, and it occurs more in the surge test.