I advise you place a 20 or 30 amp diode in line with the master back-up. You will loose .6 volts, but you should be still in tolerance. Unless you can find 30A schottky diodes then it would be .3 volts. Best of all, you won't void any warrenties.
On Tue, 29 Mar 2005 11:36:44 -0800, Daron Wilson <[EMAIL PROTECTED]> wrote: > > > I suspect the site battery bank is well charged then. Most large style > battery banks like that are taken care of with a substantial charger. So if > you intend to hook to that, probably just finding the current limiting > device that provides the trickle charge and lifting it out of the circuit is > the best, you won't be charging their batteries at all. > > > > Good Luck! > > > > > > ________________________________ > > > From: Per Molund [mailto:[EMAIL PROTECTED] > Sent: Tuesday, March 29, 2005 11:27 AM > To: [email protected] > Subject: RE: [Repeater-Builder] Vertex VXR-7000 battery backup > > > > > The problem here is twofold, we are not allowed to power our repeater from > the site battery backup system unless there is a mains power failure so > running the repeater of 12V is not an option. Secondly this battery bank is > quite hefty, I am not sure that the repeater is able trickle charge the bank > even if it is fully charged so this has to be the work of the backup system > charger. That leaves me with the option of disabling the trickle charging > from the repeater if I have been able to figure out how to do this. > > best regards, > > ---per > > At 02:43 29.03.2005, you wrote: > > > > I think the concern is that of many trickle charge systems. They are > designed to float the batteries and switch over if needed. They are NOT > designed to recharge a depleted battery bank. All this is fine unless you > lose power on the site for 48 hours and run your batteries flat and then the > power comes back on, and tries to charge them. Ideally if you ran on > batteries for some time, you would go to the site and make sure they werent > too low and/or charge them up with a real charger prior to putting the float > charger back on them. Also you could put a low voltage dropout device in > there that dropped the system prior to dipping the batteries too low. > > Good Luck! > > ________________________________ > > > From: Mark Holman [ mailto:[EMAIL PROTECTED] > Sent: Monday, March 28, 2005 4:21 PM > To: [email protected] > Subject: Re: [Repeater-Builder] Vertex VXR-7000 battery backup > > Wouldn't it be much simpler to charge the battery B4 installing it ? > playing safe that way > > Mark Holman > mark.holman at talkamerica dot net > > ----- Original Message ----- > > From: Per Molund > > To: [email protected] > > Sent: Saturday, March 26, 2005 8:42 AM > > Subject: [Repeater-Builder] Vertex VXR-7000 battery backup > > > > We have recently accuired a Vertex VXR-7000 repeater for 70 cm ham service > and planned to hook it up to our site battery backup system (~650 Ah with > dedicated charger). However the repeater manual states "Never reapply AC > power to the repeater with a discharged battery connected, as the DC startup > current can damage the repeater and battery". Does anyone know if the > repeater trickle charger can be disabled? The minimal manual included with > the repeater doesn't tell. > > regards, > > ---per > > > > > > > > > > > > > > > > > > > > ________________________________ > > > Yahoo! Groups Links > To visit your group on the web, go to: > http://groups.yahoo.com/group/Repeater-Builder/ > > To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. > > > > > > > > > > ________________________________ > Yahoo! Groups Links > > To visit your group on the web, go to: > http://groups.yahoo.com/group/Repeater-Builder/ > > To unsubscribe from this group, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
