I did not check in this specific standard (yet) but normally both tests have different criteria for the EUT passing. The earlier has a B-type criterion and the latter (more severe has a C-type criterion.
B means: continue to work after the dip (interference during may happen) C means: continue to function after the dip possibly after user intervenence (reset, reprogram, on/off etc); this is basically a no defect test. The standards that appeal to this test have the liberty to select B and C as well as a specific detailed view on how an equipment EXACTLY should behave for both B and C. As the 61000-6-2 is the new generic Standard for heavy industrial equipment, I doubt if these requirements are filled in detail. Let me show an example for some equipment: Take a Power supply for your electronics Lab. Criterion B means that after stopping somehow to function, it should come up with the same voltage set as before ! (this criterion is hypothetical and only as example). Criterion C would say here: after the test it is allowed that the on/off button be executed for the output to come back again. Regards, Gert Gremmen, (Ing) ce-test, qualified testing =============================================== Web presence http://www.cetest.nl CE-shop http://www.cetest.nl/ce_shop.htm /-/ Compliance testing is our core business /-/ =============================================== >>-----Original Message----- >>From: [email protected] [mailto:[email protected]]On Behalf >>Of JENKINS, JEFF >>Sent: Tuesday, February 13, 2001 6:42 PM >>To: [email protected] >>Subject: voltage dip requirements >> >> >> >>Hello Group, >> >>I just received a brand new, shiny copy of EN 61000-6-2. The >>voltage dip / >>interruption requirements are not clear to me. Table 4 quantifies dip and >>interruption levels as "% reduction." So, when they say a "30% >>reduction," >>I assume they mean that the voltage is reduced to 70% of its >>nominal value, >>e.g. 120 Vac is reduced to 84 Vac. This is well and good, but it seems >>illogical to me that the duration of the dip should increase with its >>severity. For instance, while they specify a 30% reduction for one-half >>cycle, they specify a 60% reduction for 50 cycles and a 95% reduction for >>250 cycles! Say it isn't so! I'm clinging to a desperate hope that they >>don't mean "x," but rather "1-x." >> >>Regards, >> >>Jeff Jenkins >>Advanced Energy Industries, Inc. >>Fort Collins, CO USA >> >> >> >>------------------------------------------- >>This message is from the IEEE EMC Society Product Safety >>Technical Committee emc-pstc discussion list. >> >>To cancel your subscription, send mail to: >> [email protected] >>with the single line: >> unsubscribe emc-pstc >> >>For help, send mail to the list administrators: >> Jim Bacher: [email protected] >> Michael Garretson: [email protected] >> >>For policy questions, send mail to: >> Richard Nute: [email protected] >> >> >>
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