We say that a fuse failed when it actually succeeded at doing its job.
That may seem like a weird thing to make a pedantic post about unless... Well, just look at the pictures.
Discussion
Great point 🤔
That's impressive. I had a box of cheap fuses that would melt under normal operating currents, warp and break contact inside the sockets (which is not supposed to happen lol)
PSA Purchase quality automotive fuses.
This looks like it's probably a power inverter?
Should be one of those on there among other things. It is the control board for a salt cell for a pool. The transformer failed. I'm hoping, but not expecting, that the board survived and a new transformer will do the trick.
When you flipped the breaker for it you could hear the transformer windings jump. Kinda wild.
Oooo. Yeah I assume you checked that the output wasn't shorted? I find it pretty rare that transformers fail on their own, but I'm no technition.