Additionally, is it safe to feed a 50-60Hz device, like my phone charger, 400Hz/120VAC?
In: Technology
The V is voltage. It’s one of the dimensions of electrical power.
AC means that the voltage pulses back and forth from positive to negative rather than staying at a fixed value (that would be “DC”).
**The Hz is** ***how fast*** **the voltage pulses back and forth.**
Way back when household electricity first became a thing, 50-60Hz were chosen because electricity at those frequencies would have relatively little leakage over long transmission lines.
But another thing about AC electricity is that *transformers* are much more efficient at *higher frequencies*. So the aviation industry chose to use 400Hz because it would allow them to use much smaller transformers on planes, where every pound counts.
As mentioned by another commenter, I would definitely not try using a device meant for one on the other.
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