| ▲ | shiroiuma 7 hours ago |
| >- no significant skin effect at 400Hz -> use speaker wire, lol. What are you talking about? There's a very significant skin effect at 400Hz. Skin effect goes up with frequency. These datacenters use copper busbars, not cable, so skin effect is an important consideration. |
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| ▲ | shdudns 6 hours ago | parent [-] |
| At 100 000 A for a 100 MW data center at 1000 V, speaker wire is a joke. You obviously need at least a dozen stands in parallel!! Clearly skin effect scales with frequency but, 400 Hz is still low, only 2.5x lines frequency (the scale is by the root); so the skin depth is 3mm. 3mm on each side makes for a pretty hefty rectangular cross-section. |
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| ▲ | bigiain 5 hours ago | parent [-] | | If you could get that 100,000Amps flowing through your speaker wire, the vaporised copper and the plasma channel would probably keep your 100MW flowing, at least until your building caught fire. | | |
| ▲ | jacquesm 5 hours ago | parent [-] | | Even your monster cable? ;) | | |
| ▲ | bigiain 5 hours ago | parent [-] | | Well, it'd still vaporise, but it'd sound smoother and more musical as it did it, and the soundstage from the plasma arc would be _stunning!_ | | |
| ▲ | jacquesm 5 hours ago | parent [-] | | It's almost worth the experiment and your cables are a sacrifice I'm willing to make. For science, of course. | | |
| ▲ | bigiain 5 hours ago | parent [-] | | You're _so_ right! I'm pretty sure you have my delivery address from when I bought sorted Lego from you about 10 years back. Let me know when to expect the 100,000Amp test equipment! I shall make sure I wear better PPE than just my reading glasses. :-) | | |
| ▲ | jacquesm 4 hours ago | parent [-] | | This would be the funniest thing to do. 100K Amps is doable, the question is for how long. That would be one very impressive bank of capacitors. And to turn a 00 into plasma would have some spectacular side effects, such as raining molten copper across a sizeable area. Just your reading glasses would indeed not be enough, there probably isn't any PPE that I would consider entirely safe other than sufficient distance from ground zero. But now I'm really curious. I have a spot welder that will do bursts of 5KA and that will happily throw the breaker every so many welds. 100KA sustained will be a fair engineering challenge. Ah, that lego project... that was one I always wondered if I should have industrialized it but sourcing enough lego was a real problem. | | |
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