Citel products do have a listing mark but this is European style CE, not American style UL/ETL. Citel is reputedly working on American certification but one would be advised to not hold one's breath.
The Citel products which mount to a DIN rail have an LED indicator which goes dark once the surge elements have been sacrificed. Also some of their units have an auxiliary switch which can remotely indicate a blown condition. This is in the form of dry contacts..a normally open and a normally closed one, so various indicator circuits can be designed around that. The contacts have a low amp AC rating and also a (lower amp) DC rating but I do not remember the numbers at present. Jolliness, Mick Abraham, Proprietor www.abrahamsolar.com Voice: 970-731-4675 On Tue, Sep 14, 2010 at 12:43 PM, R Ray Walters <r...@solarray.com> wrote: > You could buy several ground rods for the cost of one Delta. > Ground Impedance is the real issue. Both the Delta and the Polyphasor need > a good ground to work. > While I haven't seen much of a correlation between Deltas and reduced > lightning damage, (lots of system damage with and without) > I have found that well grounded systems (tied to a steel cased well) have > never had a problem, even with direct strikes to a wind turbine (did lose > the $40 turbine rectifier, but nothing else) > > I now own a clamp-on ground impedance tester, and the results were > miserable. Some electrodes were over 800 ohms to ground! (code requires > under 25 ohms) > I'd spend more time and money reducing ground impedance, and then if it > makes you feel good inside, throw the little "lightning faeries" in, if the > AHJ isn't looking....... > > If its really lightning country, and a really expensive off grid system, I > use Polyphasor, but they have their own issues. (very expensive, no UL > listing, loose internal connections, nuisance tripping, need a large J-box > to mount them inside, etc.) > I haven't tried the Citel stuff, but it looks to be listed, and mounts on a > DIN rail. After installing a couple hundred Deltas, I'd try something else > at this point. > > > R. Walters > r...@solarray.com > Solar Engineer > > > > > On Sep 14, 2010, at 10:22 AM, Kristopher Schmid wrote: > > My thought here is that nothing will protect the equipment from a direct > strike, but a near strike that may induce a significant surge may be > absorbed by the LA and protect the equipment. I like the feedback so far. > It would not break my heart to stop using them altogether.:-} > > Kris > > Legacy Solar > 864 Clam Falls Trail > Frederic, WI 54837 > 715-653-4295 > sol...@legacysolar.com > www.legacysolar.com > > -----Original Message----- > *From:* re-wrenches-boun...@lists.re-wrenches.org [mailto: > re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *August Goers > *Sent:* Tuesday, September 14, 2010 10:39 AM > *To:* RE-wrenches > *Subject:* Re: [RE-wrenches] Delta LAs > > All - > > I guess my thought is a little off topic, but are lightning arrestors even > worth using at all? My logic has always been that if lightning does indeed > strike that it's likely going to blow the arrestor and and inverter. We > don't have much of a lightning issue issue in the Bay Area so I don't have > any direct experience. > > Best, > > August > > On Tue, Sep 14, 2010 at 6:29 AM, Kristopher Schmid <sol...@legacysolar.com > > wrote: > >> It is quite ironic that just a week after I posted a question to the group >> on testing the integrity of lightning arrestors, I had one apparently >> faulty >> out of the box. The manifest of this was interesting: when the AC LA >> (LA302R) was connected in parallel on the AC input to a SB3000 inverter, >> there was 125vac neutral to L1, 125vac neutral to L2, and 1Vac L1 to L2. >> SMA tech support suggested the LA as the issue and sure enough, it was. >> Attempting to test good and faulty arrestors with an ohmmeter gave the >> same >> result - off scale open. >> >> Any thoughts or comments from the group? >> >> Kris Schmid >> >> Legacy Solar >> 864 Clam Falls Trail >> Frederic, WI 54837 >> 715-653-4295 >> sol...@legacysolar.com >> www.legacysolar.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 >> >> > > > -- > August Goers > VP, Engineering > > Luminalt Energy Corporation > 1320 Potrero Avenue > San Francisco, CA 94110 > O: 415.641.4000 > M: 415.559.1525 > aug...@luminalt.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 > > > > _______________________________________________ > 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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