Wrenches:
Is there any issue with residual voltage on the DC feeder due to capacitor charge in the inverters? William Miller From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jerry Shafer Sent: Monday, February 02, 2015 7:43 AM To: RE-wrenches Subject: Re: [RE-wrenches] Rapid Shut Down and the 10 Second Rule Questions Wrenches We have installed some of these rapid shut down units and they are always located close to the array and ours kill the DC instantly as long as the inverter was running when this accures did not test it with inverters already off. Jerry On Feb 2, 2015 5:34 AM, "Christopher Warfel" <cwar...@entech-engineering.com> wrote: We have a interpretation problem among some people I work with with, and 690.12 Rapid Shut Down and the the 10 second time for reducing ac and dc conductors to 240ma, and 30V. The word "initiation" seems to indicate that all affected conductors need to be at these levels within 10 seconds of de-energizing either the ac or dc conductors. If so, then the disconnects need to be co-located to meet this requirement if this interpretation is correct.
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