We are EMC testing a product with a standby mode. EN60335 states " The appliance is subjected to voltage dips and interruptions in accordance with IEC61000-4-11. The durations specified in Table 1 of IEC61000-4-11 are applied to each test level, the dips and interruptions being applied at zero crossing of the supply voltage".
Table 1 has three classes, in Class 3 there is a dip to 20% of the mains supply for 5 seconds. It is this mode which the product powers down and upon the mains being restored, powers on and starts up. There is a foot note in the standard which says " For equipment connected directly or indirectly to the public network, the levels must not be less severe than Class 2. The product passes Class 2. EN60335 is in my mind a bit unclear, but we are marking it as a fail. If anyone is doing this testing regularly and can add some comment, I'd appreciate it. Rgds - ---------------------------------------------------------------- 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]>
