Adam,
I have heard that those expulsion fuses when they blow open, they do so with a hell of a bang and a lot of sparks and " spare parts" going everywhere... makes me not want to park under one or near one with my truck let alone be under one when it happens to " go off".. Is it true these fuses are like little bombs or firecrackers when they open? Just wondering..
Yes, expulsion-type fuses are designed to provide enough force upon fusing, to knock the top of the fuse link out of the holder and allow the fuse carrier to drop down and hang in it's hinge at the bottom of the fuse carrier, ready for the PoCo faultsman to replace it.
Admittedly they do go off with a rather pronounced bang, but bear in mind the amount of energy flowing through that fuse-link before it ruptures, that has to be dissipated.
