Date: Wed, 18 Mar 2009 11:29:37 -0700
Reply-To: Rocket J Squirrel <camping.elliott@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Rocket J Squirrel <camping.elliott@GMAIL.COM>
Subject: Re: Problem with Stancor 120-901 relay??
In-Reply-To: <91c8f9760903181113se62658ct83e5adf08942bc7c@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
I'm with those people who have used the 120-901 for a few years with no
apparent problems (nothing's caught on fire, no smell of baking
insulation, etc.) so I expect that I'll be okay, but if I'd-a known then
what Wes has discovered I'd-a ordered the 902.
--
Mike "Rocket J Squirrel" Elliott
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
Bend, OR
KG6RCR
On 3/18/2009 11:13 AM pickle vanagon wrote:
> I've now ordered the 120-902, which is identical to the 901 except it
> has the higher voltage rating (15v, with pickup at a minimum of
> 11.25v). This is what Stancor intends to be used in battery charging
> situations (see their sheet on choosing relays:
> http://www.stancor.com/wrdstc/pdfs/Catalog_2006/Pg_094.pdf)
>
> As mark points out, the 901s have been used in lots of peoples vans and
> there haven't been any reports of problems, but I figure that for people
> that are going to use one of these relays in the future, the 902 is the
> "correct" choice.
>
> If anyone thinks otherwise and wants to buy my leftover 120-901, drop me
> a line!
>
> -Wes
>
>
> On Wed, Mar 18, 2009 at 12:02 PM, Rocket J Squirrel
> <camping.elliott@gmail.com <mailto:camping.elliott@gmail.com>> wrote:
>
> Hey Wes,
>
> Good catch on the Stancor's coil rating.
> --
> Mike "Rocket J Squirrel" Elliott
> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
> 74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
> Bend, OR
> KG6RCR
>
>
>
>
> On 3/17/2009 4:10 PM pickle vanagon wrote:
>
> I know the stancor 120-901 relay is popular among listmembers for
> dual-battery setups, so I ordered one when I was preparing to do
> my big
> electrical project.
>
> I finally got around to looking at the detailed spec sheet, and
> see that the
> relay is rated for 12v of coil voltage, and is suited to take up
> to 10% more
> than that. (The spec sheet is here:
> http://www.stancor.com/wrdstc/pdfs/Catalog_2006/Pg_052_53.pdf).
> Of course,
> 10% more than that is just 13.2 volts, which is below what
> you'll see in
> your van when driving around. In fact, at the bottom of the
> spec sheet,
> Stancor has printed the warning:
> "Note: Caution must be used in coil selection for use in 12 volt
> systems
> where battery charging may expose coil to continuous,
> higher-than-rated
> voltage. Stancor will not be responsible for consequences of
> misapplied
> solenoids."
>
> So, is this relay not such a good choice after all?
>
> On the other hand, it seems they have another relay (120-914)
> intended for
> automotive use and rated up to 15volts (its on the same spec
> sheet). If I
> read the spec sheet, this will come online at 11.25 volts (75%
> of 15), which
> should be fine. Maybe this is an acceptable choice?
>
> Thoughts?
> -Wes
>
>
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