Comment please. the term phase voltage and line voltage get interchange at times. Only place PHASE voltage can be measured at the transformer lug. Inside the property that would be the line voltage. comment please
“Thisin’ we can’t put on lighting it reads about two hunnn-erd ate volts two hunnn-erd ate volts on hunnn-erd twinny volt system dunn werk tew well, cause lotta smolk n stuff liiii dat”… this man speaks my language
Not a bad job at all sir :) Not enough young Lineman, out in the field, get to see 3 pot closed Delta Power only corner ground. Delta/ Delta or Wye /Delta corner ground, So in the future will you please show the Wye/Delta or Delta/Delta corner ground Two Pot Bank, they are rare but do exist. Thanks, Blane Owens.
Here in Australia we just hang a single 3PH transformer & be done with it, although our voltage is 240/415V but each transformer feeds about 40 domestic installations,single phase,most 3PH installations have their own transformer.
Out of interest, do you happen to know what those transformers weigh, and their VA rating? (The type you see on a wooden pole in a residential street.) Our place is 3ph but doesn't have its own transformer (WA). Not sure where it is to be honest. All I know is that once or twice a year, 1 of the phases will go 'brown', then a few minutes later all 3 will go dead. I guess they need to fix it and never get around to it.
You can use the high leg for modern LED light fixtures. Most of them have universal voltage drivers in them (100-277volts). Just make sure you use a straight rated 240 volt circuit breaker.
rtz549 I don't have an answer for you on that. Maybe email Mr. Rusty @ Lamar Institute of Technology. That is where we filmed this. Thanks for watching and we do appreciate your question.
Because on all Distribution transformers which have additive polarity the Primary bushings are H1 and H2 from left to right and the Secondary bushings are X1 X2 and X3 from right to left.
That is incorrect. For additive polarity the secondary bushings will be labeled x3, x2 and x1. The primary bushings will always be labeled H1 and H2 regardless of the polarity of the transformer.
Stephen Smith It depends on the utility supplier. I live in Exelón power territory (north east US) and they use wye systems, due to the old age of their lines. So SWER systems are very common here, especially in residential areas. But in newer installed systems, in rural or growing cities, they are primarily delta, so at least 2 phases are ran in those systems.
+Stephen Smith 2 banks can be run as open Delta thus still supplying power to a business if one of the three fail...Also 3, 300 lb transformers are easier to transport and put on a pole than 1 that weighs 900 lbs
+Mel Mc well I have a 3ph transformer supplying my house and its rated at 100kva but only 1ph out and 3ph supplying the dairy shed and looks cleaner on the environment
Why bother with a wye primary? Use a Delta primary thus doing away with the risk of feroresonance in the first place. Just about all your 3 phase dry type transformers have Delta primaries probably for that very reason.
Interesting! 4 wire delta is unheard of where I am, 3-wire ungrounded delta ( with use of ground indicator lights) and open delta were common but are rare now.. Basically all there is to choose from for low voltage 3 phase power here is 120 / 208V or 347 / 600V.... 347V being a common voltage for commercial lighting.
Cheap US wiring of powerlines. No quality, just cheap so every mediocre dude can handle it. This is because they have no propper and long training, without learning the principles, ohm's law and so on. Every guy, which walks three days with a wrench and screwdriver in his hands, is called an electrical engineer. And when I see those transformers; for me they are looking like mop buckets, mounted at the top of a wooden pole. In words: poor, poor, quality; cheap materials.
Stephen Smith thats because the US has had electricity for well over a hundred years and and you sheep 🐑 lovers just got wired up its all new stuff over there.
