Hi all, Good day, (1) If Class III electrical protection is defined as appliance with voltage output less than SELV (30Vrms based on IEC 60950 IT equipment), so can a laptop AC - DC power adaptor with output rating 19Vrms, 2.37A be considered as Class III, given that output current, 2.37A is much more than 10mA Threshold "Let-Go" current ?
(2) How does Isolation Transformer different from the usual Step-Down Voltage Transformer? (3) And how does Isolation Transformer helps to achieve Class III electrical protection as stated in page 3 of https://www.excelsys.com/wp-content/uploads/2011/09/ApplicationNoteAN1102-ClassIvsClassII.pdf Hope to hear from you soon. Thank you & have a nice day ahead. Vincent Regards, Vincent - ---------------------------------------------------------------- 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 <emc-p...@ieee.org> 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
