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Old Jun 08, 2011, 11:57 AM
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Joined Mar 2009
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Dell PE6800 Power Supply’s powers 2 FMA Powerlab 8’s.Completed

They are the JD200 model
I got info on how to set them up from this post.
http://www.rcgroups.com/forums/showt...0#post18035251

The second power supply has the DC isolated by taking out the 2 screws that are close to the DC output. I ground down the studs on the case and put a piece of fiberglass in.

In the test I have both chargers outputting 40 amps into 4S battery’s.

Charger 1 is charging 4 4S5000 packs. Charger2 is charging 2 4S5000, 4S3250 and a 4S3000 pack.

I have the power supply’s hooked to different 120 volt circuit breakers.
The Kill a Watt meter said the power supply is using 910 watts, PF .99, 115.5 Volts, 7.8 amps.

The second power supply I just had an amp meter on it and got 8.3 amps.
The input side of the chargers is 25.4 Volts 28 amps (That is 711 watts per charger).

The negative side of the Powerlab is hooked to the DC that is grounded. I am not sure if the matters.

The DC power distribution buss was made by:
http://www.helifreak.com/private.php...m&pmid=1420996

I could not have done it without xandrios help from RC Groups.
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Last edited by KAW_Concours; Jun 08, 2011 at 06:43 PM.
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Old Jun 08, 2011, 08:41 PM
Dale
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Joined Jul 2004
303 Posts
Your 4s5000 packs look like they have 16 cells each in them and it looks like maybe that is your main pack that you fly.

Have you thought of setting 1 charger up to charge them in an 8s configuration so you can get the full potential watts through that PL8?

You could probably charge all 3 4s5000 packs at once like that at over 1400 watts input.

Dale
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Old Jun 09, 2011, 07:07 AM
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Joined Mar 2009
71 Posts
The "parallel safe adaptors" only go to 6S.

I like the poly-fused connections. I have hooked up stuff wrong and have had the poly-fuses save me. If you plug in a 3 cell and a 4 cell pack on different parallel boards at the same time you don't melt anything.

The max charge rate for the 8S5000 TP V2 is 4C. I don't want to go over 3C with these expensive batteries. I can do 2C if I charge 2 at a time and when I do 1 at a time I do 3C.

I would like FMA to make 8S "parallel safe adaptors".

Thunder Power split the discharge leads into 2 4S packs anyhow. They split the balance leads into 3S and 5S. Then they hooked one balance wire to the wrong side of the jumper discharge wire so I had to tear down the packs to rewire them.

Before I rewired them I was thinking about not using the "parallel safe adaptors". I wanted to keep them and all of my other packs are 4S or less. This way my balance boards work with all of my batteries.

At the field I only have 12 volts so I could not charge any faster anyway.
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Old Jul 18, 2011, 12:58 PM
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Baltimore, MD
Joined Apr 2007
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KAW,

After you isolated the 12v return, which pins did you have to connect to get your 6800 to power up? Was it any different from the other non-isolated 6800?

I'm having some trouble getting mine to power up correctly.
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Old Jul 18, 2011, 06:34 PM
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Baltimore, MD
Joined Apr 2007
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OK, I think I found the answer to my own question. I'd still like to know if this is how you did it though KAW...

Pins A1 & B6 normally go to ground but when you isolate the DC return from ground A1 & B6 to ground will not start up the JD200 power supply because it's not ground they're looking for. Connect A1 & B6 to the main DC return & the power supply powers up like it should.

That sound about right to you?
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Old Sep 18, 2011, 08:00 AM
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Nice work, KAW!
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