Fusible link???

This sort of thing also happens in house / building wiring. I once responded to a "no heat" call and the tip-off is the description of the customer

"I think we were hit by lightning. The lights and other things in the house are doing weird things. Some of the lights are bright, and they go brighter or dimmer when you turn things on or off"

Yeah you did, and you have an "ungrounded neutral." What is happening is that "half" the 120V loads are in series with "the other half" on the other side of the neutral center tap

We "did" a building in Rathdrum, an old Safeway they moved out of into a new building. A (I think Garbage) truck snagged the service drop, damaging it, and tore the neutral loose. Somehow, this turned all the metal conduit inside the attic into a gigantic hotplate. It also "cooked" the gas in the natural gas piping.

So the fire boys came, and after that the electricians came, and after that I came over to resurrect the heating / HVAC. I ended up at the "far end" of the nat gas piping, with a propane torch at the end of a flex connector held away, with the torch "pilot light". I had to bleed gas for a LONG time before I got a clean flame.

It destroyed a number of boards in HVAC equipment. This was a 208 or 240V three phase system. This type of damage can hide itself before you get everything checked out. We were back there several times before it was over