Well, any electrician should know that some three phase circuits have a wild leg.
Sent from my iPhone > On Aug 23, 2020, at 3:25 PM, Steve Jones <thatoneguyst...@gmail.com> wrote: > > > I know enough to get in a pickle, so we started hiring electrician to run to > our generator cutover. I go from there. Not even sure if I can hold this > against the electrician, it's an honest mistake and nobody got hurt > >> On Sun, Aug 23, 2020, 1:36 PM <ch...@wbmfg.com> wrote: >> Actually only one of the three legs will be high assuming there is a ground >> on one of the windings of a delta connection. So two of the legs should be >> 120 to ground. You just got unlucky with the breaker placement. >> >> From: ch...@wbmfg.com >> Sent: Sunday, August 23, 2020 12:32 PM >> To: AnimalFarm Microwave Users Group >> Subject: Re: [AFMUG] Aviat power supplies and exploding power strips >> >> I can see that three phase breaker right above your single leg breaker. >> Check all three. I am sure you will find one you can use if there is an >> open slot on that phase. >> >> From: Steve Jones >> Sent: Sunday, August 23, 2020 12:12 PM >> To: AnimalFarm Microwave Users Group >> Subject: Re: [AFMUG] Aviat power supplies and exploding power strips >> >> Spot fucking on, chuck. I was up all night worrying about this shit, even to >> the point the varying metals and floating box was making a massive murder >> capacitor. >> >> Turns out there's 210v and all our existing PSU are rated to 240v, the >> meanwells are switch selected, and this power strip happenned to have surge >> where the other did not. >> >> Not sure why the first meanwell is running. But at least I'm not blowing up >> a farmers grain bins >> >>> On Sun, Aug 23, 2020, 11:45 AM Chuck McCown <ch...@wbmfg.com> wrote: >>> I had something similar happen. An electrician picked the wild leg of a >>> three phase to connect a new receptacle. We had about 208 volts on it. Of >>> course only discovered after the damage. I have seen neutrals get damaged >>> and connected to the other side of the box giving you 220. Did you check >>> your AC voltage? >>> >>> Sent from my iPhone >>> >>> > On Aug 22, 2020, at 9:35 PM, Steve Jones <thatoneguyst...@gmail.com> >>> > wrote: >>> > >>> > >>> > Today was an adventure, to say the least. >>> > Without the prior info on the clusterrest clusterfuck of my career, we >>> > are installing some wtm4200. Glancing these meanwell power supplies may >>> > or may not be -48v. >>> > We have two radios onsite, first powers up swimmingly >>> > Second power supply connected only to AC decides to smoke bomb. Was >>> > plugged into a triple plug on a power strip. Was powered on for a bit >>> > then did its rocket ship thing. Figured ok, just a bum meanwell, the >>> > other one is up and powering a radio without issue. >>> > I'm plugging in a cambium ps into the triple plug as my contractor is >>> > plugging in a power strip into the second on a duplex outlet. >>> > The fucking powerstrip explodes, literally. >>> > It's a cheap surge suppressor power strip. So I'm assuming the SS is what >>> > blew up. >>> > I have no further data, since my contractor almost lost a hand. I'll >>> > investigate in morning daylight. >>> > >>> > Somewhere in this power mix I screwed up. >>> > >>> > With the limited data I have, anybody got any ideas before somebody gets >>> > killed? >>> > >>> > I have 2 force 300-25, a force 300_13, a , a mikrotik, and a 3000 epmp >>> > omni on this power strip. Circuit is less than 2 feet to the breaker. >>> > Breaker is in an extended panel I'm unaware of the wiring details. The >>> > first wtm powered with no issue. >>> > This is a 20 amp breaker, when the meanwell fried it didnt trip. But >>> > simply plugging in a powerstrip, with nothing in it, almost cost my >>> > contractor a hand. >>> > >>> > Any idea where I fucked up. This is a grain leg and they're not to find >>> > of explosions. >>> > >>> > I'm wondering, since they bond the dc return to ground if it's not >>> > energizing a chassis or something >>> > -- >>> > AF mailing list >>> > AF@af.afmug.com >>> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
