In message <[email protected]>, dated
Sat, 6 Dec 2014, [email protected] writes:
Is it possible that a fast breakdown of the dielectric barrier, by a
fast event, like ESD or EFT, in a two wire mains power supply, cause a
larger follow-on current from the AC mains and therefore a safety
problem.
With no PEC, and no ground on the isolated side, where would the mains
current flow? The ESD goes through the capacitance to ground, but the
capacitance is surely too small to allow significant mains current to
flow.
If there is a ground on the isolated side, the dielectric barrier would
have to fail catastrophically to let mains current through.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
When I turn my back on the sun, it's to look for a rainbow
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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