You understood wrong my statement. Assume that you have two independent connecting channels in the same connecting tube. One is a live low-voltage channel for c

You understood wrong my statement. Assume that you have two independent connecting channels in the same connecting tube. One is a live low-voltage channel for communication protocol and the other one is high-power (but dead in idle) pumping channel. When you plug the tube you automatically connect both channels. After that, having the info-line established, having assured that the couple has been locked & safe (i.e. insulated), both systems might then agree on opening the second high-power channel. It won't matter if it will take more than a few milliseconds to open or cut the power with the tube being in a safe coupling state. By "safe coupling state" I mean that not even the contact with the possible ionized air is allowed, the line being covered/insulated all the way. You just design the systems to not allow power to drain from the source unless it's safe. I also think that it's already time to design all the systems like that, not only the high-power car-recharging ones. This would make a difference in lives saved.