[RE-wrenches] AC coupled relay

[Christopher Freitas]

I have usually done the same setup as Kirk - but I have used the Potter
Brumfield "PRD" style relay - which are available from Grainger under
the "Dayton" brand name (of course).  These provide a "visual break"
which is nice to be able to check when doing testing etc.  

 

I like using the AC coil together with a DC coil signal relay as it
allows some nice options for redundancy and fail-safe design.  

 

These are large, heavy duty, open frame 30 amp 2 pole with normally
closed and normally open contacts and available with 12vdc, 24vdc,
120vac or 240vac coils.  Grainger even has one now with an auxiliary
switch included - which could be used to send a signal or turn on a
light to alert the system user that there is an outage.  

 

Relays: http://www.grainger.com/Grainger/wwg/catalogPDF.shtml

 

NEMA 1 Type Relay Enclosure:
http://www.grainger.com/Grainger/items/1EGH7  

 

I hope this helps! 

 

Christopher

 

 

Christopher Freitas

Director of Research and Development 

OutBack Power Systems, Inc.

cfreitas at outbackpower.com <mailto:cfreitas at outbackpower.com> 

Tel 360 435 6030

Cell 360 202 4239

19009 62nd Ave NE 

Arlington WA 98223 USA

www.outbackpower.com <http://www.outbackpower.com/> 

________________________________

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Kirk
Herander, VSE
Sent: Wednesday, June 03, 2009 11:05 AM
To: jryago at netscape.com; 'RE-wrenches'
Subject: Re: [RE-wrenches] AC coupled relay

 

I have done it with a SQD 60a, 240 vac contactor. The coil is 120 vac.
It is driven by a secondary 12vdc relay sending 120 ac to the coil. The
coil of the dc relay is driven by the 12 vdc auxiliary output of the
Outback FX inverter. I use the contactor and dc relay normally closed
contacts. They open when the inverter energizes the dc relay.

 

Kirk Herander

Vermont Solar Engineering

802.863.1202

NABCEP(tm) Certified Solar Installer

NYSERDA-eligible Installer

VT Solar Incentive Program Partner

________________________________

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jeff
Yago
Sent: Wednesday, June 03, 2009 9:35 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] AC coupled relay

 

What specific supplier, model number, and brand relay have you found to
be perfect to isolate the inverter AC output to the sub-panel of a
battery-based inverter in an AC coupled system?

 

This will be in the 20 to 30 amp 240 VAC contact range.  Also, do you
normally set it up as N.C. or N.O. for fail-safe reasons?   Coil voltage
12 vdc or 120 vac?  

 

Thanks,

 

Jeff Yago


 

________________________________

Netscape.  Just the Net You Need.


MESSAGE CONFIDENTIALITY NOTICE:
This message (including attachments) is covered by the Electronic Communication Privacy Act, 18 U.S.C. sections 2510-2521, is confidential, and may also be protected by attorney-client or other privilege. If you believe that it has been sent to you in error, please do not read it. If you are not the intended recipient,you are hereby notified that any retention, dissemination, distribution, or copying of this communication is strictly prohibited.  Please reply to the sender that you have received the message in error, then delete it. Thank you.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20090603/43e9d9a0/attachment-0003.html>