In a mining situation, why would you think they’d be handled by humans? I would expect it to be a machine driven coupler. Completely unrealistic in a consumer situation due to potential damage and liability. But in a mine? Nobody is going to care about a scratched body panel.
They might care about horrific electrical accidents.
With High voltage/high Amperage acidents - your lucky if you die on the spot otherwise you last a few days in intensive care with limbs blown off and your internal organs destroyed
Like EV chargers, the couplers and protocols are designed with safety in mind. It's not like you're plugging in to a giant electrical socket and throwing a switch. The system handshakes, runs tests for current leakage, etc. If anything doesn't check out 100%, it won't energise.
Then where are all the folks dying today from the high power Tesla Supercharger incidents? 2MW or 250kW, either way you'll be dead if that accidentally lights you up.
If you set the system up right, you can't do that in a meaningful way, and if you do... well there's 2MW of deterrent. It only takes one workplace incident like that to make sure the bosses put some measures in place to make sure it never happens again. And keep in mind: at that kind of power level, you aren't just zapping one person... it's probably going to destroy a LOT of equipment and infrastructure... so there's a hefty monetary incentive to make sure that never happens.
Sure, the wall chargers you have in your house are. You think the 400V, 625A circuits (250kW chargers) are just dumb circuits though? Fairly certain they have temperature and voltage monitoring on both sides of the cable and both sides of the connector, all to monitor for any issues with either the connector or the cable continuously. Anything goes wrong, gets to hot, etc? It kills power.
You're right though. Medium voltage circuits (and above) are going to be much more complex. The fact is, once you start operating at medium voltage and above, stuff that previously was an insulator may not actually be as insulating as you think...
