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it’s a technicality, but if you do this to all the machines at precise same time it would not work. the attack relies on the grid being there and leveraging the power it generates to destroy one piece of equipment.

that said, you could take out a significant number by performing the attack in a serial fashion

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You can definitely do this to all of them at the same time. And only one would survive. Why? Because out of sync does not mean the out of sync frequency is the same to all of them. SO you have machine1 at 70 HZ, machine 2 at 30 HZ and so on. Connect all them together out of sync in the grid and you get them all fight each other. Do this maliciously 10 times and in under a minute all but one are totaled, like the one in the video from article.

Inductance in the grid would probably be sufficient to destroy them all, even if they were the only equipment on the grid and they were all destroyed at once. It's a lot of power flowing.

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