Hmm... 5 mA 3000V that's a small 15 Watts.
Ethernet coax uses a high voltage cap in parallel with multiple resistors.
- Robert -
-----Original Message-----
From: Jim Eichner <[email protected]>
To: 'EMC-PSTC - forum' <[email protected]>
Cc: Tom Unger <[email protected]>
List-Post: [email protected]
Date: Thursday, September 16, 1999 4:36 PM
Subject: Resistors across Reinforced Insulation
>
>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).
>
>
---------
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).
