Elsewhere I was reading a thread, and saw this rather amusing anecdote
TL;DR version - 3 phase input UPS appears to have had a single phase link bar left in when connected to 3 phase supply, causing a dead short across the phases with inevitable bang on power up and taking out power to a large part of the building.
Now I'm sure everyone does test for shorts between line(s) - earth and neutral - earth, how many would get caught out by something like this ?
Anyone admitting to having been caught out by it - I imagine the bang could be "unmissable"
I replied to him.
TL;DR version - 3 phase input UPS appears to have had a single phase link bar left in when connected to 3 phase supply, causing a dead short across the phases with inevitable bang on power up and taking out power to a large part of the building.
Now I'm sure everyone does test for shorts between line(s) - earth and neutral - earth, how many would get caught out by something like this ?
Anyone admitting to having been caught out by it - I imagine the bang could be "unmissable"
I replied to him.