"The only likely cause for a power filter cap blowing like that is a power surge issue or a mechanical short. The only incident like that I have experienced in decades of commercial installations was when high voltage showed up between neutral and ground on an AC outlet. "
The power surge taking out the diode bridge and allowing AC into the capacitor..
Interesting...I owned a repair shop for 20 years or so way back, when 8086 8088 processors were everywhere. There was a 3 phase transformer above the one that feed the shop. Everyone around the shop with PC, would loose power supplies, TVs up in smoke, Everything except the store. I had Topaz line conditioners in the shop..I mean top of the line at the time, FREE. got them out of a hospital closure.
They (across the street) had a thing called a Delta stinger, a Large welding / fab shop. One leg was 208-220, I think. The other two were 110, 220 between the two 110-117 . It was so they (not me) had 480 for their welding shop.They had a transformer in the facility also.
I'm kinda close on the description. That big transformer shared a common leg, up on the pole I don't recall just how. BUT at night I saw a little light show between the two. I called PGE. they ran a tape on both sides of the Topaz units. Before unit and after. 135-165 VAC spikes whenever they were welding with certain rigs, across the street. The Topaz units worked perfect. No brownouts no, Overages. PG&E paid for anyone that had complained. Something to do with that delta stinger setup, the PG&E guys said.. At my house back then, hovered at 105 then spike at night. All fixed now, but dirty AC all kinds of problems, ay..
Regards
The power surge taking out the diode bridge and allowing AC into the capacitor..
Interesting...I owned a repair shop for 20 years or so way back, when 8086 8088 processors were everywhere. There was a 3 phase transformer above the one that feed the shop. Everyone around the shop with PC, would loose power supplies, TVs up in smoke, Everything except the store. I had Topaz line conditioners in the shop..I mean top of the line at the time, FREE. got them out of a hospital closure.
They (across the street) had a thing called a Delta stinger, a Large welding / fab shop. One leg was 208-220, I think. The other two were 110, 220 between the two 110-117 . It was so they (not me) had 480 for their welding shop.They had a transformer in the facility also.
I'm kinda close on the description. That big transformer shared a common leg, up on the pole I don't recall just how. BUT at night I saw a little light show between the two. I called PGE. they ran a tape on both sides of the Topaz units. Before unit and after. 135-165 VAC spikes whenever they were welding with certain rigs, across the street. The Topaz units worked perfect. No brownouts no, Overages. PG&E paid for anyone that had complained. Something to do with that delta stinger setup, the PG&E guys said.. At my house back then, hovered at 105 then spike at night. All fixed now, but dirty AC all kinds of problems, ay..
Regards