[RE-wrenches] Overvoltage Sensor for 48V Battery Bank

[Darryl Thayer]

Peter
David Katz sent  me this note. I did not see it on re-wrenches 

Hi Darryl,
I have used the voltage controlled relays from Solar Converters on page 117 of the AEE catalog - 020-06218 or the Morningstar relay driver 020-01255 on the same page.
David 

--- On Fri, 10/2/09, Peter Parrish <peter.parrish at calsolareng.com> wrote:

> From: Peter Parrish <peter.parrish at calsolareng.com>
> Subject: Re: [RE-wrenches] Overvoltage Sensor for 48V Battery Bank
> To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
> Date: Friday, October 2, 2009, 5:26 PM
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> Good thing
> the relay is actually a DPDT
> and I have it wired so that the SB functions until I can
> get the overvoltage
> thingy. I will ultimately rewire it. Wm., thanks for the
> sharp attention to
> detail. - Peter
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> Peter T.
> Parrish, Ph.D., President
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> California Solar Engineering, Inc.
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> 820 Cynthia Ave., Los Angeles, CA 90065
> 
> CA Lic. 854779, NABCEP Cert. 031806-26
> 
> peter.parrish at calsolareng.com 
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> Ph 323-258-8883, Mobile 323-839-6108, Fax
> 323-258-8885                                                                                                   
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> From:
> re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of William Miller
> 
> Sent: Friday,
> October 02, 2009
> 1:16 PM
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> To:
> RE-wrenches
> 
> Subject: Re:
> [RE-wrenches]
> Overvoltage Sensor for 48V Battery Bank
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> Peter:
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> Excuse me if I am exhibiting my ignorance, but won't a
> Normally Closed relay
> fault in the undesirable state?
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> William Miller
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> At 10:44 AM 10/2/2009, you wrote:
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> I seem to have
> lost the email that recommended a battery
> sensor that can function in a high-voltage disconnect
> system. We have a 48V
> battery bank as part of an AC coupled Grid-Tied Battery
> Backup System and I
> have already installed a N/C 2P relay on the output of the
> SB3000 inverter. So
> all I need is a sensor that will provide a 12Vdc signal to
> the relay coil at
> the HV set point.
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> Someone was kind enough to recommend a unit and if they are
> reading this,
> please resend your recommendation!
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> - Peter
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