Re: [RE-wrenches] Fronius State 104

[Kent Osterberg]

Jeff, Is there any chance the utility has recently implemented a remote meter reading system? The Aclara TWACs remote meter reading system communicates by putting a pulse on the line that is very near the zero crossing of the voltage waveform. Unfortunately the zero crossing is easily and often used as a reference point for frequency measurements. Devices that watch the zero crossings are often confused by the TWACS signal. The signal isn't there constantly -- only when the local kWr meter has been asked to send data. Kent Osterberg Blue Mountain Solar, Inc. www.bluemountainsolar.com t: 541-568-4882 On 10/8/2012 9:34 AM, Jeff Wongstrom wrote: Hello wrenches, We have a Fronius IG3000 that chronically and frequently cycles into and out of a state 104(grid frequency not within admissible range).   The utility has monitored the supply and claims to have found no frequency or supply issues.   Fronius sent a replacement inverter but the error persists. The tie in point was moved from the critical loads sub panel to the main distribution panel.  The state 104 persists with ALL other breakers open.  A Fluke DMM min/max function captures no frequency readings outside of the inverter frequency window-same with voltage readings.    Any suggestions or recommendations? Thanks, Jeff Jeff Wongstrom NABCEP Certified 406.291.3416 thirstylakesolar.com _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org

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