All,
I am evaluating spacings for an RF product that operates at 13.56 MHz
and can produce maximum voltages of 5,000 Vrms (7,070 Vpk). If I do an
interpolation of using Table 6 (Mains 230 V, OV Cat II, indexing on
5,000 Vrms), I get a minimum clearance requirement of 14.9 mm. When I
do the same calculation on Table K.17 (column 3, indexing on 7,070 Vpk),
I get 12.7 mm.
Now I understand the effects of high frequency voltage stress causing
air molecules to become more energetic and therefore more likely to
break down at lower voltages. So why in this case does IEC 61010-1
Table K.17 result in lower clearance values than Table 6? Somehow, this
just seems wrong.
/Please note that in the case of high frequencies paragraph K.3.1
indicates I am to skip over section K.3.2 with the D1 + F × (D2 – D1)
calculations./
Thanks a bunch!
Doug
Douglas E Powell
[email protected]
http://www.linkedin.com/in/dougp01
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society emc-pstc discussion
list. To post a message to the list, send your e-mail to <[email protected]>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <[email protected]>
Mike Cantwell <[email protected]>
For policy questions, send mail to:
Jim Bacher: <[email protected]>
David Heald: <[email protected]>
