Hi everyone: Is there a standard interpretation (e.g. in EN60950) that allows or disallows the bridging of a Reinforced isolation boundary by resistors? This stretches the term "isolation" a bit, but my feeling is that isolation really involves dielectric withstand and limitation of leakage current, both of which can be provided by resistors. If there is disagreement with that, I'm dead right away.
So assuming the idea isn't dead right off the bat, here are some ideas off the top of my head: - obviously there would have to be 2 or more in series, to meet the single fault requirement - the total resistance would have to be sufficient to limit the current during hipot testing to a value that the hipot instrument can handle (say 5mA at 3000V, so 600k ohms) and a value that is acceptable to be considered - each resistance would have to be sufficient so that, with the other one shorted out, the leakage current between the two circuits would be limited to non-shock-hazardous levels given the working voltage in the 2 circuits Any comments or previous interpretations on this, anyone? Thanks in advance, Jim Eichner > Senior Regulatory Compliance Engineer Statpower Technologies Corporation [email protected] http://www.statpower.com Any opinions expressed are those of my invisible friend, who really exists. Honest. --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
