We had one farm where we got the 3 phases, one wild, but no neutral. Luckily when we asked Phoenix Contact, they said we could connect L and N of the power supply we were using (actually a TRIO UPS) to L1 and L2.
From: AF <af-boun...@af.afmug.com> On Behalf Of Chuck McCown Sent: Sunday, August 23, 2020 6:52 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] Aviat power supplies and exploding power strips 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 <mailto: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 <mailto: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 <mailto: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 <mailto: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 > <mailto: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 <mailto:AF@af.afmug.com> > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com _____ -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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