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#46
03-16-2022, 10:10 AM
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Very surprised to hear 120 volt was ever used in Europe. Always knew Japan had 110vac though.
Standard service is 240 volts in UK/Europe, just like US 240, but its just 2 wires (line and neutral) and 50 Hz, not 60. For industry and commercial use in Europe, 220/380volts was the early wye and 240/415 the present wye 3-phase voltage, which use a neutral conductor. US has 3-phase in 2 standard wye configurations (208/120 and 480/277) Canada uses 600/347 wye instead of 480/277, as if that weren't enough. USA, prior to WWII, used 220 three phase delta with no grounded conductor, just an equipment ground. 440 also used as a delta in larger users. I will spare the details on two-phase and 25 Hz, since it was early but appropriate for the times then. Last, there is the 240/120 volt three phase delta, where one of the phases (usually B) is the "wild leg" and the other two, A+B are each 120 volts to neutral. This requires separate 240/120 single and 240 three-phase circuit breaker panels. Lastly - Salute to both Nikolai Tesla and George Westinghouse, co-inventors of three-phase ac power! 
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"When resistors increase in value, they're worthless" -Dave G Last edited by DavGoodlin; 03-16-2022 at 10:15 AM. 
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#47
03-16-2022, 01:26 PM
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Yes, I remember the old timers talking about 3 phase delta distribution, when I was a summer intern at SCE&G. The reason they went to wye was because, if a primary fell down, it would not blow a fuse or trip an OCR, because the earth was floating with respect to the primaries. It would just lay there and electrify the earth close by. Very unsafe.
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#48
03-18-2022, 09:54 PM
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Here is a discusion about electricity: http://videokarma.org/showthread.php...06#post3240406
Yes, there where 120 Volts in Europe. 3 phase in some cases was 208 Volts. Probably 120 Volts was of U.S.A. inspiration. And back then there wasn't a general standard. So there where 42 Hz. sometimes in stad of 50. I wonder how good where the French color tv sets compared to the U.K. ones. More about television then tv sets  https://telesatmedias.com/le-passage...-1er-oct-1967/ Here are some French colour tv sets (I like the "Schinder" very much): https://radio-piffret.pagesperso-orange.fr/TV.htm In 1969 there where 135.000 color tv sets in France. In 1973 there where arleady 1.045.000 (1,045,000) versus 12.660.000 black and white. So about 1 in 10 tv sests was colour. I wonder why France was so slow in allowing private tv station to broadcast. Last edited by Telecolor 3007; 03-18-2022 at 10:39 PM.
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#49
03-21-2022, 06:36 AM
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Quote:
 https://www.barco.com/en/about-barco/history/timeline I have some TV sets from them. For some reasons they were sold under COBAR! Regards, TV-collector 
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Scotty, beam me up, there is no more 4/3 Television and AM radio in Germany! Last edited by TV-collector; 03-21-2022 at 06:39 AM.
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