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Frozen Horse posted:Interesting. This is making me wonder about the usefulness of designing sound, lighting, and power-generation equipment for portable-generator driven outdoor festivals (or raves, etc.) to work at 400 Hz. Lighter amp-stacks to load and unload, less of the expensive copper wiring and permalloy in the amps, easier-filtered mains hum, and one can always run it off of some sort of inverter when there is mains power available. Is this complete crack-pottery? It'a a decent thought, and applied on aircraft where weight savings are important, but as grover already covered, you'd have to compensate in your cabling and you would see a more pronounced skin-effect through the conductors. Thanks for this thread Three-Phase, I only took two high-power classes back at school, I'm mostly high-speed signals / digital electronics these days. And whoever posted that beer analogy for S/P/Q, that is amazing, I stole it immediately.
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Sep 13, 2011 16:12
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| # ¿ May 4, 2024 09:35 |
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The Proc posted:230 delta vs 208 wye: What are the pros and cons of each and how do you decide which is better for a particular installation? Bit rusty... Wye (208V) 208V between any two legs 120V between any leg and neutral Delta (230V) 230V between any two legs 115V between two legs and ground** some higher voltage for the last leg to ground (180V?) ** - some Delta systems are not grounded So Wye delivers three 120V rails for your goodies, Delta can only deliver two (obviously). Delta would deliver a higher voltage. Note that Wye provides two voltages: 208V between phases, and 120V between a phase and the neutral. Useful for a large installation, I would imagine. Delta only* provides 230V between phase-to-phase. *I am not an electrician, I am an EE, but the stories I've heard about some guy picking the "wrong" leg from a delta to get some 115V scare the poo poo out of me, so I'd leave it to an expert to say something about getting phase-to-ground/neutral voltages out of Delta. squeakgeek: Wye vs Delta referring to the circuit topology of each and their resemblance to the Greek letter delta and the letter Y, respectively. References [1] [2] movax fucked around with this message at 18:50 on Sep 13, 2011 |
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Sep 13, 2011 18:46
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grover posted:I think you're confusing delta with center-tap delta, which is a special case and not all that common. Delta and Wye are a lot simpler than that: Whoops, yeah that's it, thanks grover. 
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Sep 14, 2011 04:33
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What's a good nuclear engineering textbook you guys used in school? Wikipedia's nice, but I'd like a book I can read to improve my knowledge of the reactor types and keep them straight in my head.
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Sep 24, 2011 02:45
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