I'd severly doubt they'd allow anything like 10%. Also remember that the peak flux, that determins saturation, is the integral of I dT, so you can run a 60 Hz transformer at 50 Hz if you reduce the input to 100 VAC instead of 120 VAC.
-John =================== > We have AEP here, but it's like you said, go out in the country where > Buckeye Rual Elect. is, and you have outages all the time, and you don't > want to live there in the winter. > > Clocks is not what I'm concerned over as much as certain pieces of > industrial equipment that must rotate at a certain speed, or are supposed > to. Also, if they are going to allow the frequency to get slower, any > motor, or transformer, needs more iron in it, and just a 10 Hz difference > is enough to amount to a significant increase in iron. One can easily use > a > 50 Hz transformer on 60 Hz, but not a 60 Hz on 50 Hz. The speed difference > in motors from 50 Hz to 60 Hz would be around 1.2%, just roughly guessing > it in my head, at 1800 RPM, and we don't know how much they intend to > allow > it to vary. > > Best, > > Will > > *********** REPLY SEPARATOR *********** > > On 6/24/2011 at 6:33 PM gary wrote: > >>It all depends where you live. I know people that get an outage a week, >>so setting clocks is a way of life. >> >>PGE, bless their corporate hearts, is run both like a Swiss clock and >>third world nation power. If you have a fair amount of industry or malls >>nearby (i.e. customers), your power is great. Live at the edge of town, >>and things are not so good, even in Silicon Valley. Monte Sereno, Monta >>Vista (now Cupertino), etc. >> >> >>On 6/24/2011 6:07 PM, Will Matney wrote: >>> I predict, with all of my oracle abilities, snort, that the test won't > run >>> no time until there's a law suit. Almost everyone uses battery powered >>> clocks nowdays, on the wall, and most alarms are digital with xtal >>> timebases. However, there are still those old foggies who still have >>> motorized clocks depending on 60Hz to do their duty. If this makes them >>> obsolete, I wonder if the government is prepared to buy folks > replacement >>> clocks, like they provided the digital receivers for our TV's? Like I > said, >>> I can see a courtroom battle as I write this. >>> >>> Best, >>> >>> Will >>> >>> *********** REPLY SEPARATOR *********** >>> >>> On 6/24/2011 at 8:50 PM paul swed wrote: >>> >>>> "change you can count on" >>>> Thanks. All those silly alarm clocks by the bed. >>>> >>>> On Fri, Jun 24, 2011 at 7:02 PM, Bob Kupiec<bobkup...@comcast.net> > wrote: >>>> >>>>> >>>>> AP: Power grid change may disrupt clocks >>>>> ----------------------------------------- >>>>> http://news.yahoo.com/s/ap/20110624/ap_on_hi_te/us_sci_power_clocks >>>>> >>>>> >>>>> Time Error Correction Elimination >>>>> --------------------------------- >>>>> http://www.nerc.com/page.php?cid=6|386 >>>>> >>>>> NERC Report - June 14 >>>>> --------------------- >>>>> http://www.nerc.com/files/NERC_TEC_Field_Trial_Webinar_061411.pdf >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> time-nuts mailing list -- time-nuts@febo.com >>>>> To unsubscribe, go to >>>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>>> and follow the instructions there. >>>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. >>>> >>>> __________ Information from ESET Smart Security, version of virus >>> signature database 5851 (20110206) __________ >>>> >>>> The message was checked by ESET Smart Security. >>>> >>>> http://www.eset.com >>> >>> >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- time-nuts@febo.com >>> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >>__________ Information from ESET Smart Security, version of virus > signature database 5851 (20110206) __________ >> >>The message was checked by ESET Smart Security. >> >>http://www.eset.com > > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.