[91482] in North American Network Operators' Group
Re: APC Matrix 5000 question(s)
daemon@ATHENA.MIT.EDU (Michael Loftis)
Tue Aug 1 19:11:30 2006
Date: Tue, 01 Aug 2006 17:10:33 -0600
From: Michael Loftis <mloftis@wgops.com>
To: "Robert E.Seastrom" <rs@seastrom.com>, up@3.am
Cc: nanog@merit.edu
In-Reply-To: <87psfpc0qg.fsf@valhalla.seastrom.com>
X-MailScanner-From: mloftis@wgops.com
Errors-To: owner-nanog@merit.edu
--On July 28, 2006 9:33:59 AM -0400 "Robert E.Seastrom" <rs@seastrom.com>
wrote:
>
>
> up@3.am writes:
>
>> I left for several hours and came back to the house stinking like burning
>> rubber. The new batteries are apparently melting the terminal rubber
>> insulation. I had to throw it back into bypass mode and unplug that pack
>> (the only one with new batteries!)
>
> By "terminal rubber insulation" do you mean the insulation on the lugs
> that bolt to the terminals on the batteries? If so, this is a sign
> that you either didn't clean the contacts or didn't bolt them together
> firmly. Those batteries need to be initially charged, and they draw a
> lot of current when doing that... which heats up any kind of high
> resistance connection in the chain.
>
>> Any ideas to the cause? The status screens looked ok. ("no bad
>> batteries" again)
>
> By the way, you probably ought to replace all the batteries in all
> your packs regardless of what the battery status monitor says.
>
> ---Rob
Yeah my other thought here was that one or more of the other packs had
totally dead shorted cells, that'd cause excessive heating on the other
batteries too.
