I don't believe there are any power quality requirements imposed on inverters except those specified by buyers (in the USA, anyway). You can still buy square-wave inverters, after all, and the "modified sine wave" could be called "Chock Fulla Harmonic" power. Harmful interference is a limitation, but not one I'd expect manufacturers to be eager to fix, except, perhaps, to refund the purchase price. (Who's fixing the zillion SP's plugged into our toys?)
And that warranty opens a whole _barrel_ of worms. Does user equipment with an integral surge suppressor void the warranty? The consumer doesn't know it's there, either. I'd imagine state attorneys general would have things to say about implied warranty of serviceability, if this came to their attention in a sufficiently egregious way. Passengers would sure hesitate to get on a liner whose lifeboats were described so unconfidently. As for plugging all equipment directly onto the inverter, that's unrealistic. I install an inverter in or on the battery compartment, in accordance with manufacturer recommendations, to minimize DC voltage drop. The inverter is connected to an AC distribution panel (which includes surge suppressors and filters). Then equipment I want to run, analyzer, receivers, signal generators, whatever., plugs into that. An IEC line cord won't even _reach_ the battery compartment where the inverter is installed. And a UPS that generates transients enough to fire suppressors, transients >from which users ARE FORBIDDEN TO PROTECT EQUIPMENT, seems to me one to avoid. Could be, such warranties will end up costing vendors more than they'd expected. Then too, a good corporate counsel would point to the hundreds of warranties honored in spite of extension cords and surge suppressors, and convince a trial judge that state implied warranty, and vendor's existing warranty performance, had voided those restrictions historically, and presently. Cortland This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
