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

[Peter Parrish]

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

 

 


Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
peter.parrish at calsolareng.com  
Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885


 

  _____  

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
To: RE-wrenches
Subject: Re: [RE-wrenches] Overvoltage Sensor for 48V Battery Bank

 

Peter:

Excuse me if I am exhibiting my ignorance, but won't a Normally Closed relay
fault in the undesirable state?

William Miller



At 10:44 AM 10/2/2009, you wrote:



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.
 
Someone was kind enough to recommend a unit and if they are reading this,
please resend your recommendation!
 
- Peter
 

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