Mains Pains - Two Phase Days
Added 2018-06-11 04:55:46 +0000 UTCIt's always something in Philadelphia....
Comments
Hey Fran....What a weird and wonderful mains system you have in Philly! Looks like something out of Dr Frankenstein’s Lab (Pun intended ha ha Fran Lab!). All that’s missing are a few knife switches to throw on the mains. :-)
Harry Lakhaney
2018-06-13 18:42:54 +0000 UTCAnd the two phases are 90° apart from each other, so it's no stripped down version of 3 phase system (which would be 120° offset per phase), but one half of a four phase system!
2018-06-13 17:17:06 +0000 UTC2-phase mains, did not know those existed, US is a weird country sometimes :-)
2018-06-11 15:20:29 +0000 UTCThanks Tesla!
Fran Blanche
2018-06-11 14:27:58 +0000 UTCIt's sluggish. My shop neighbor had a 2-phase to 3-phase converter installed on our floor for some of his larger lathes.
Fran Blanche
2018-06-11 14:27:41 +0000 UTCSo, the early motors would have been wound for the 2-phase operation? Just like there are three-phase motors today. No need for starting capacitors.
Daniel Bingamon
2018-06-11 13:01:08 +0000 UTCHow does a modern induction motor behave on 240V with a 90 degree phase shift instead of 180? In our building we have 120/208 3-phase, and the 120deg phase shift causes the motors to take longer to start...
Brad Wilmot
2018-06-11 11:44:50 +0000 UTCWow! That is really amazing. And the room in the basement looks unreal.
Paul John Showalter
2018-06-11 05:51:52 +0000 UTCOh wow, what a beautiful set of antique switchgear. I wonder if the building has an elevator with a DC generator or mercury arc rectifier to complete the vintage beauty? 👍
Carissa Vixen
2018-06-11 05:21:18 +0000 UTC
