In message
<64D32EE8B9CBDD44963ACB076A5F6ABB02716E48@Mailbox-Tech.lecotech.local>,
dated Wed, 16 Sep 2015, "Kunde, Brian" <brian_ku...@lecotc.com> writes:
However, our 300 watt power supplies are used in a product that is
plugged into a 30A – 50A single phase branch circuit. I assume that
such a circuit in a commercial or industrial environment can produce
much larger inrush currents than is possible with our test equipment in
the EMC Lab.
To drop a worst-case 10% of 230 V at 50 A, the source resistance is
0.046 ohms, and the prospective short-circuit current is 500 A. You can
expect real supplies not to be anywhere near worst-case for
voltage-drop, so think 2500 A or so.
--
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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