[RE-wrenches] low voltage disconnect relay

[Allan Sindelar]

Jeff,
I think you can get mercury contactors at 48V and above, up to 100A and
three poles, from Mercury Displacement Industries, www.mdius.com.
This company made the DC contactors used for years in Ananda/APT/Pulse
powercenters during the 1990s. Never known one to fail. Mercury safely
contained.

Allan Sindelar 
 <mailto:allan at positiveenergysolar.com> allan(at)positiveenergysolar.com 
NABCEP Certified Solar PV Installer 
Positive Energy, Inc. 
3201 Calle Marie 
Santa Fe NM 87507 
505 424-1112 

-----Original Message-----
From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jeff Blick
Sent: Wednesday, March 04, 2009 3:17 PM
To: re-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] low voltage disconnect relay



Hi wrenches,

I am working on a project that involves a large UPS system.  The UPS system
is powering all DC loads, and as such the batteries will be connected
directly to the backup loads panel.  I am wondering if any of you are
familiar with a relay that will operate as a low voltage
disconnect/reconnect.  We are using stacks of three xantrex xw
inverter/chargers for each back up battery bank.  Do any wrenches know of a
relay that would work for this configuration (48 volt battery bank)?  I
thank you all for your time and expertise.

 

Jeff Blick

Lead PV Installer

Sunlight Solar Energy, Inc.

direct: 541-306-4196

fax: 541-322-1911

jeff.blick at sunlightsolar.com

www.sunlightsolar.com 

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