Power supply 26V 121A - 2x DELL POWEREDGE 6850

kenobi36 · 04-06-2013, 03:07 AM

Recently made bought in good price 2 server power supply dell Poweredge 6850
Standard paramenters :
1470W
12V
121A.
37x20x3,5cm
Weight: Heavy

Both were different but its not a problem.
Fist one:

Turn it on by connecting together two botom pins on the lest side and second from the bottom on the right side pin.

Inside:
Red arrow - voltage regulation
Yellow arrow - ground isolation.

Second has alu chasis, made in Mexico and its level 6

Inside

Together

Connectors

Back side

They don't have built in fan's
Bad news is that we need to buy new fan's becouse they heat up strongly even without load.
Good news is we don't have to cheet electronics to make fans work quiet and we can use any lor rpm fan's.

I used two 70x70x15mm fan's, only 18dB

Done

69fordf100 · 03-22-2014, 04:48 PM

Can you show your final wiring? I just got the 1st shown and need to see how you did your power regulation.
Thanks

kenobi36 · 03-25-2014, 01:59 PM

I dont exactly understand what you want to know.
Ther is no power regulation. You can change only voltage a little.

69fordf100 · 04-07-2014, 05:43 PM

I got the wires all soldered in and I found the pot that raises the voltage. Worked great. For 10minutes. I was testing out the supply on a car audio amp of only 300 watts and I heard a sound like a gunshot.. Needless to say, the power supply and the amp shut down., but the supply would never turn back on. Upon further investigating, I found a blown MOSFET inside. One of the large mosfets on the power rail completely blew to peices. Then I remembered you recommended a fan or two for the heat. Well just got two more of these in. Hopefully these will last.

On the power regulation, I meant voltage adjustment. I found it in the pic.

power_puller · 05-09-2014, 07:26 PM

Questions:
1. Didn't you have to (at least) connect the load sharing pins on each 6850 to the other in order to parallel these supplies safely?!
2. Do you know how to bypass (or defeat) the OVP in these units in order to get ABOVE the 13.6 vdc (top setting) or know someone that does ("Xandrios" of RCGroups did, but hasn't been available for quite sometime now, I understand. and apparently, no one else is tech saavy enough to help).?
Thanks!
power_puller

kenobi36 · 05-21-2014, 03:46 PM

1. I have serial connection
2. No, 25-26V is enough for me.

04-06-2013, 03:07 AM	#1
kenobi36 Registered Users Join Date: Feb 2010 Location: Poland Warsaw	Power supply 26V 121A - 2x DELL POWEREDGE 6850 Recently made bought in good price 2 server power supply dell Poweredge 6850 Standard paramenters : 1470W 12V 121A. 37x20x3,5cm Weight: Heavy Both were different but its not a problem. Fist one: Turn it on by connecting together two botom pins on the lest side and second from the bottom on the right side pin. Inside: Red arrow - voltage regulation Yellow arrow - ground isolation. Second has alu chasis, made in Mexico and its level 6 Inside Together Connectors Back side They don't have built in fan's Bad news is that we need to buy new fan's becouse they heat up strongly even without load. Good news is we don't have to cheet electronics to make fans work quiet and we can use any lor rpm fan's. I used two 70x70x15mm fan's, only 18dB Done __________________ Kenobi36 - RCmaniak.pl Blade mCPX BL, Protos Mini Stretch 4S, Goblin 500 550mm blades, Goblin 700, HWC TRex 600 gasser 690mm blades.

03-25-2014, 01:59 PM	#3
kenobi36 Registered Users Thread Starter Join Date: Feb 2010 Location: Poland Warsaw	I dont exactly understand what you want to know. Ther is no power regulation. You can change only voltage a little. __________________ Kenobi36 - RCmaniak.pl Blade mCPX BL, Protos Mini Stretch 4S, Goblin 500 550mm blades, Goblin 700, HWC TRex 600 gasser 690mm blades.

04-07-2014, 05:43 PM	#4
69fordf100 Registered Users Join Date: Mar 2014 Location: Covington	Wow I got the wires all soldered in and I found the pot that raises the voltage. Worked great. For 10minutes. I was testing out the supply on a car audio amp of only 300 watts and I heard a sound like a gunshot.. Needless to say, the power supply and the amp shut down., but the supply would never turn back on. Upon further investigating, I found a blown MOSFET inside. One of the large mosfets on the power rail completely blew to peices. Then I remembered you recommended a fan or two for the heat. Well just got two more of these in. Hopefully these will last. On the power regulation, I meant voltage adjustment. I found it in the pic.

05-09-2014, 07:26 PM	#5
power_puller Registered Users Join Date: May 2014 Location: Orem	6850 parallel supplies Questions: 1. Didn't you have to (at least) connect the load sharing pins on each 6850 to the other in order to parallel these supplies safely?! 2. Do you know how to bypass (or defeat) the OVP in these units in order to get ABOVE the 13.6 vdc (top setting) or know someone that does ("Xandrios" of RCGroups did, but hasn't been available for quite sometime now, I understand. and apparently, no one else is tech saavy enough to help).? Thanks! power_puller

05-21-2014, 03:46 PM	#6
kenobi36 Registered Users Thread Starter Join Date: Feb 2010 Location: Poland Warsaw	1. I have serial connection 2. No, 25-26V is enough for me. __________________ Kenobi36 - RCmaniak.pl Blade mCPX BL, Protos Mini Stretch 4S, Goblin 500 550mm blades, Goblin 700, HWC TRex 600 gasser 690mm blades.

03-22-2014, 04:48 PM	#2
69fordf100 Registered Users Join Date: Mar 2014 Location: Covington	Can you show your final wiring? I just got the 1st shown and need to see how you did your power regulation. Thanks