"Realistically (statistically) speaking, AC is more dangerous that DC. This comes from the fact that 120/240v AC is the voltage that we are most likely to encounter - which can kill us. The DC voltage that we are most likely to encounter is 12 DC (in our vehicles), and it is very unlikely to kill us."
Many relays have a DC rating and a AC rating, the DC rating is much lower.
That does make sense....I was reading that the AC "voltage" is the RMS (root mean square)...it's a sort of average voltage vs DC which is a flat voltage. So it makes sense the AC rating would be lower as thats the average... but the AC peak voltage would be higher (I think).
20 years ago I used to know all this off the top my head.....those days ave long gone now!
hat's a bit like saying lions are less dangerous than zebras..
Surely everything but the motors and Regen would be running 12v or below as per ice ?I think what they mean by "statistically" is that they are equally dangerous but people are being killed more by AC simply because there is a lot more opportunity with 240v being in every house.....where as most DC the same people have encountered has only been 12v so chances are it's the AC that will get them!
I wonder if we'll see more DC related deaths as electric car numbers increase maybe...especially when people have been so used to messing with 12v electrics!
Surely everything but the motors and Regen would be running 12v or below as per ice ?
I recently attended a training course in Glasgow, where the whole grid sustainability thing was discussed. I asked the visiting proffessor (one of the main European and UK gurus on the subject) - if we were starting from scratch would we use ac or dc? No doubt it would be dc, we might soon even see some "minigrids" where large housing estates will be dc, with converters for streets etc.
from what I can see it’s just battery>inverter>motor that’s high voltage
Surely everything but the motors and Regen would be running 12v or below as per ice ?
To replace the screwdriver that's just been vaporised.Yes absolutely....but people who know nothing about electrics might think it's all 12v because they are so used to cars all being a safe voltage when in fact the battery packs are supplying 600v?
I'm pretty sure you can slap all the warnings you want on the batteries and the high voltage stuff and someone will still stick a screw driver in it....then try to sue the manufacturer!
Those megalinks you refer to are commonly found across countries (e.g. France to UK) and the main reason is because they're on different mains frequencies so kind of mandates that there's a DC link somewhere...With modern semiconductors they now use dc megalinks its actual more sensible as its easier to convert it to ac and keep it synchronous to the frequency.
Additionally, DC power links need fewer conductors - they are not 3-phase - and, since there is no skin effect and no reactive power losses, the wires can be thinner.megalinks - the main reason is because they're on different mains frequencies so kind of mandates that there's a DC link somewhere...
I googled which is more dangerous....turns out AC is a lot more dangerous than DC....!
Those megalinks you refer to are commonly found across countries (e.g. France to UK) and the main reason is because they're on different mains frequencies so kind of mandates that there's a DC link somewhere...
Those megalinks you refer to are commonly found across countries (e.g. France to UK) and the main reason is because they're on different mains frequencies so kind of mandates that there's a DC link somewhere...