In message
<64D32EE8B9CBDD44963ACB076A5F6ABB026C5D9A@Mailbox-Tech.lecotech.local>,
dated Tue, 25 Nov 2014, "Kunde, Brian" <[email protected]> writes:
with a 230VAC powered instrument where the energy to produce an Arc
Flash is somewhat limited.
There is quite a lot of energy available. It depends on the power supply
current rating, but a ball-park industrial 230 V supply branch impedance
at 50 Hz is 0.2 ohms[*]. So the short-circuit current is 1150 A and the
power is 264500 W.
[*] For a 10% voltage drop at full load, 0.2 ohms means a circuit rating
of a modest 115 A.
--
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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