It's easy to see that it is a delta primary /wye secondary running in reverse. There is no need for a neutral on straight 480 loads and nowhere to connect it on the delta winding. The primary winding appears to simply have a defect in the insulation between turns.
Since this is a step up x-former from 120/208 V Wye to 277/480V Wye, how is the 277 V getting a neautral? And yes, the EE is full of it. You must bond X0 to the x-former in which is bonded to the building steel. This is why I am a Union Mechenic and you are just a fly-by. Real Mechenics bend conduit, not buy pre-fab.
@Megawatts37 it not about being union its about giving a crap about the job I maybe a non union service guy but my shit looks good, and I met a few union guy just lookin to get a pay check
I saw the XO lug plate had no lugs or cables terminated to it, so it looks like there is no bond made to ground, no neutral is established here. I can't tell from the pictures but I would assume there is no bond to building steel --since there is nothing on the XO terminal-- besides the ground wires in the conduit.
Per the electrical engineer I was told not to bond the XO lug.The frame and bond bushings are under a buss bar that is tied to building steel and water.
This xfmer was back fed from 208 to 480 3phase.There was no net required for the equipment it was serving.I was instructed by the E.E. to let it float.I just did another the other day and found out I needed to bond one of the phases to ground to keep this from happening!!!
You would have to ask GE where the bottom of the xfmr is!Bond bushings were used you just can't see them behind the insulation.This was designed and approved as a three phase only xfmr...no neutral was required for the equipment being served.Everything was bonded on a ground bar,I didn't get that picture shown in this video.
wow where do i start... for one where is the bottom of that transformer??? second. where are the grounds and the neutral attached, do they even have ground bushings on the connectors?? amazing the shitty work people do..
It's easy to see that it is a delta primary /wye secondary running in reverse. There is no need for a neutral on straight 480 loads and nowhere to connect it on the delta winding. The primary winding appears to simply have a defect in the insulation between turns.
ytmachx 2 months ago
there are no bonding bushingson the flex comming in.
hetfield9900 6 months ago
Since this is a step up x-former from 120/208 V Wye to 277/480V Wye, how is the 277 V getting a neautral? And yes, the EE is full of it. You must bond X0 to the x-former in which is bonded to the building steel. This is why I am a Union Mechenic and you are just a fly-by. Real Mechenics bend conduit, not buy pre-fab.
Megawatts37 1 year ago
@Megawatts37 it not about being union its about giving a crap about the job I maybe a non union service guy but my shit looks good, and I met a few union guy just lookin to get a pay check
hetfield9900 6 months ago
Maybe you could lose the useless music and speak more clearly. It's bad enough that you speak with a thick foreign accent, without mumbling.
mikeshepherd 1 year ago
Next time you make a video There are 2 things you should do differently
1. have the mic farther away from your mouth so you don't get those annoying breathing and puffing sounds
2. DON"T MUMBLE. It's hard to understand what you are saying without turning the volume way up. Speak clearly and confidently.
ucw458 1 year ago 4
WHHATT??????
dwarfer777 1 year ago
I saw the XO lug plate had no lugs or cables terminated to it, so it looks like there is no bond made to ground, no neutral is established here. I can't tell from the pictures but I would assume there is no bond to building steel --since there is nothing on the XO terminal-- besides the ground wires in the conduit.
russdonruss 1 year ago
@russdonruss
Per the electrical engineer I was told not to bond the XO lug.The frame and bond bushings are under a buss bar that is tied to building steel and water.
sparkyUonline 1 year ago
the cover ?
Mess1410 2 years ago
There is no neutral being used for this xfmr!
sparkyUonline 2 years ago
lol@the cover
CommanderB9488 2 years ago
i see thees transformers hanging on the seeling home depot i allways what it was
windoes98se 2 years ago
This xfmer was back fed from 208 to 480 3phase.There was no net required for the equipment it was serving.I was instructed by the E.E. to let it float.I just did another the other day and found out I needed to bond one of the phases to ground to keep this from happening!!!
sparkyUonline 2 years ago
You would have to ask GE where the bottom of the xfmr is!Bond bushings were used you just can't see them behind the insulation.This was designed and approved as a three phase only xfmr...no neutral was required for the equipment being served.Everything was bonded on a ground bar,I didn't get that picture shown in this video.
sparkyUonline 3 years ago
wow where do i start... for one where is the bottom of that transformer??? second. where are the grounds and the neutral attached, do they even have ground bushings on the connectors?? amazing the shitty work people do..
cicarnal 3 years ago