Non-linear:
Given a relation involving one dependent variable and one independent variable, the dependent variable quantity does not change in direct proportion to a change in the independent variable. I'm not completely happy with it, but it's a start.... Ralph McDiarmid ________________________________ From: John Woodgate <[email protected]> Sent: April 8, 2017 12:30 AM To: Ralph McDiarmid; [email protected] Subject: RE: [PSES] definition of terminology Yes, some definitions can be criticized. IEC TC1 is always looking out for new participants. (;-) How would you define 'non-linear'? There are often requests (demands) for definitions of words used in their normal 'dictionary' sense or quite obvious in meaning. With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk<http://www.jmwa.demon.co.uk> J M Woodgate and Associates Rayleigh England [http://www.jmwa.demon.co.uk/me.jpg]<http://www.jmwa.demon.co.uk/> Demon Internet - J. M. WOODGATE AND ASSOCIATES<http://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J. M. WOODGATE AND ASSOCIATES . Electronics Design, Standards and Marketing Consultants. 3 Bramfield Road East, RAYLEIGH, Essex, SS6 8RG, England Sylvae in aeternum manent. -----Original Message----- From: Ralph McDiarmid [mailto:[email protected]] Sent: Friday, April 7, 2017 11:16 PM To: [email protected] Subject: Re: [PSES] definition of terminology That seems a handy resource all right. I didn't know it existed. At random, I looked up these three examples: non-linear, adj -qualifies a circuit element or a circuit for which not all relations between the integral quantities are linear *not really helpful, because it only states that non-linear is not linear* and then this one: instantaneous power -for a two-terminal element or a two-terminal circuit with terminals A and B, product of the voltage uAB p=uAB⋅i where uAB is the line integral of the electric field strength from A to B, and where the electric current in the element or circuit is taken positive if its direction is from A to B and negative if its direction is from B to A *huh?* and finally this one: reactive power -for a linear two-terminal element or two-terminal circuit, under sinusoidal conditions, quantity equal to the product of the apparent power S and the sine of the displacement angle φ Q=Ssinφ *what displacement angle?* I know the angle to which it refers, but it's not stated; maybe somewhere else* I have to say that all three definitions leave me wanting. Ralph McDiarmid Product Compliance Engineering Solar Business Schneider Electric From: Doug Powell [mailto:[email protected]] Sent: Friday, April 07, 2017 2:48 PM To: Ralph McDiarmid <[email protected]> Cc: EMC-PSTC <[email protected]> Subject: Re: [PSES] Voltage Rating vs Voltage Specification There is a resource, but few actually use it to my knowledge. http://www.electropedia.org/ Doug On Fri, Apr 7, 2017 at 9:41 AM, Ralph McDiarmid <mailto:[email protected]> wrote: Pete, I wonder if the onus to define the terminology like “rated voltage” should really be on the technical committees, not academia. I know that is some standards, terms like "disconnect" and "trip" are loosely defined. I wonder if there should be one IEC document, which could serve as a reference to all others for terminology. I think there is one, but it is likely not comprehensive. Ralph McDiarmid Product Compliance Engineering Solar Business Schneider Electric - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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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]>
