Odd. What charges the batts?
In any event, yes, should work just fine.
From: TJ Trout
Sent: Sunday, April 26, 2015 2:02 PM
To: af@afmug.com
Subject: Re: [AFMUG] Power supply back feed loss?
This is not wisp related. I just posted here because you are so knowledgeable.
The power supply will never be on while the batteries are connected. It's one
or the other. The load, the power supply and the batteries will occasionally
all be in parallel when the power supply has no access to AC in the field.
Otherwise normally the load will be powered via the power supply when AC is
available. Is this an acceptable solution?
On Sun, Apr 26, 2015 at 12:45 PM, Chuck McCown <ch...@wbmfg.com> wrote:
When the power goes out and then comes back on you certainly are charging
batteries along with powering the load. And partially discharged batteries can
be a huge load.
From: TJ Trout
Sent: Sunday, April 26, 2015 1:37 PM
To: af@afmug.com
Subject: Re: [AFMUG] Power supply back feed loss?
I'm not charging batteries. I just need to be able to parallel a psu with the
load and batteries occasionally.
On Apr 26, 2015 7:06 AM, "Chuck McCown" <ch...@wbmfg.com> wrote:
The whole rectifier shelf, the module or the BC-2000?
From: Lewis Bergman
Sent: Sunday, April 26, 2015 7:55 AM
To: af@afmug.com
Subject: Re: [AFMUG] Power supply back feed loss?
I have an extra one of those if you want it.
On Apr 26, 2015 8:43 AM, "Chuck McCown" <ch...@wbmfg.com> wrote:
A load of that size really needs a regular telecom rectifier/charger.
They are designed for exactly this application. If your load is 100 amps, the
power supply needs to be probably 120 or 150 with current limiting so it can
pull the load and charge the batts after an extended outage. Lately I have
been using these:
http://www.eltek.com/us/detail_products.epl?id=1233974&cat=24671&k1=&k2=&k3=&k4=&close=1
If you get the BC-2000 controller, you get a nice battery load test and
telemetry option too. You can run the system just on batts for any specified
amount of time and graph the discharge. Shows the life and health of the
battery really quickly.
On Apr 23, 2015 11:34 PM, "TJ Trout" <t...@voltbb.com> wrote:
I have a dc load that I need to power using a switching ac to dc power
supply but I also occasionally need to power the load from batteries, I was
planning to put the load, power supply and battery clamps in parallel, is that
a acceptable solution ? Can I power the load from battery and back feed DC into
the supply without damaging it? Would there be a significant drain back into
the supply?
If this isn't ok, what's better solution? Diode ? SPDT switch ?
The load is 50V 100A so that makes diodes and switches a challenge to
find. ..
