IPC sounds like the bureaucratic definition of a wall outlet. Ed Price Chula Vista, CA USA
-----Original Message----- From: Ralph McDiarmid [mailto:[email protected]] Sent: Friday, November 18, 2016 12:47 PM To: [email protected] Subject: Re: [PSES] Internal point of coupling Yet one more acronym to try to remember. Ralph McDiarmid Product Compliance Engineering Solar Business Schneider Electric *Please consider the environment before printing this e-mail -----Original Message----- From: John Woodgate [mailto:[email protected]] Sent: Friday, November 18, 2016 6:49 AM To: [email protected] Subject: Re: [PSES] Internal point of coupling I'm not a power engineer, and I've had to learn their little ways, so perhaps I can explain. You have a dozen machines in one building. They are all connected to a busbar in that building, and from the busbar a cable runs to the power transformer feeding the whole site. That busbar is an IPC. It's significance for EMC is that if one machine causes voltage disturbances at the busbar due to large currents during start-up, or, as in the case I am writing about, injects currents at harmonics of the power frequency, other machines connected to that same busbar may be adversely affected. Machines in other buildings are somewhat protected from those effects by the impedances of the cables from the buildings to the transformer. With best wishes DESIGN IT IN! OOO - Own Opinions Only www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. -----Original Message----- From: Kunde, Brian [mailto:[email protected]] Sent: Friday, November 18, 2016 2:07 PM To: [email protected] Subject: Re: [PSES] Internal point of coupling This thread has tickled my interest. I have never heard of the term IPC used in this way nor do I understand the definition. Can someone provide context and give an example of how it would be used? When the definition refers to "network", is this the AC Mains network? And why is the Point of Coupling a significant point of concern? Thanks. The Other Brian -----Original Message----- From: Andre Gomes Videira [mailto:[email protected]] Sent: Friday, November 18, 2016 7:06 AM To: [email protected] Subject: [PSES] RES: [PSES] Internal point of coupling Hello John, The definition is in IEC 61000-2-4. IEC 61800-3, which is the EMC standard for PDS, states that the IPC is defined in IEC 61000-2-4 as "In-Plant Point of Coupling". >From IEC 61000-2-4, item 3.1.7: IPC - "point on a network inside a system or an installation, electrically nearest to a particular load, at which other loads are, or could be, connected. Note: The IPC is usually the point for which electromagnetic compatibility is to be considered" André Gomes Videira Laboratório de Ensaios e Certificações Telefone: + 55 47 3276-7613 | Skype: agvideira WEG Drives & Controls - Automação Ltda. www.weg.net -----Mensagem original----- De: John Woodgate [mailto:[email protected]] Enviada em: sexta-feira, 18 de novembro de 2016 08:59 Para: [email protected] Assunto: [PSES] Internal point of coupling I am looking for a definition (preferably formal) of 'Internal point of coupling' for a proposed IEC Technical Report. It is not in Electropedia and is mentioned (as IPC) In IEC 61000-2-6 without definition. I am told that it might be defined in one of the IEC 61800 series standards, but there are several of them. With best wishes DESIGN IT IN! OOO - Own Opinions Only www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England Sylvae in aeternum manent. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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