4 ms·
It's an AC line, so when the helicopter retracts it will get a static charge instead of fluctuating in sync with the line, giving an immediate potential differe
by widforss 8y ago
It's an AC line, so when the helicopter retracts it will get a static charge instead of fluctuating in sync with the line, giving an immediate potential difference.
I have no source for this, just amateur reasoning.
- zaarn 8y agoIt's very likely capacitance. At 200kV even a couple dozen meters above ground the capacitance would be enough to get a couple microamps over an arch (it would likely tickle a bit). AC makes isolating rather complicated since increasing your resistance to ground naturally turns you into a capacitor which acts like a resistor in AC (which is why thin rubber soles on your shoes don't protect you, you want think ones to increase resistance and decrease capacitance) so a small current will flow. At high voltage this small current can still be transmitted over an plasmaarc.