Agree with Charles, you need to provide a compliant system to the end user. This means test with the UPS since it plugs into the AC Mains.
Regards, Mark From: Grasso, Charles [mailto:charles.gra...@dish.com] Sent: Tuesday, July 24, 2018 10:38 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Dips and interruptions when connected to UPS If the device is so critical that a permanently attached UPS is needed - why not test? The UPS in the system may not live up to the advertising! From: Amund Westin [mailto:am...@westin-emission.no] Sent: Tuesday, July 24, 2018 6:36 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Dips and interruptions when connected to UPS This message originated outside of DISH and was sent by: owner-emc-p...@listserv.ieee.org<mailto:owner-emc-p...@listserv.ieee.org> If a device is permanent connected to an uninterruptible power supply (UPS) via its AC input port, can the Voltage dips and interruption test be omitted? It could sound like a possibility, but maybe it depends on the UPS performance. Any experiences? I can not find any exemptions in the test standards (EN 301 489 series, generic EN61000-6-X)) Best regards Amund - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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