News:

LATEST RELEASE:  FPP 6.3 - Download from here - https://github.com/FalconChristmas/fpp/releases/tag/6.3

+-+-

+-User

Welcome, Guest.
Please login or register.
 
 
 
Forgot your password?

+-Site Stats

Members
Total Members: 15649
Latest: zj023
New This Month: 53
New This Week: 12
New Today: 1
Stats
Total Posts: 128307
Total Topics: 15780
Most Online Today: 52
Most Online Ever: 7634
(January 21, 2020, 02:14:03 AM)
Users Online
Members: 2
Guests: 21
Total: 23

HP Power Supplies in Parallel

Started by algerdes, July 03, 2021, 01:59:38 PM

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

algerdes

"Don't ..." seems to be a word people use a lot, not only around their children, but also around here when it comes to use multiple power supplies.  There comes a time when "Don't" doesn't cut it!

I'm mounting 3 HP HSTNS-PL18 power supplies in one cabinet, then connecting all three together in a bus/parallel setup.  All 12vdc power (vdc +) will come from one bus bar and all 12vdc negatives (vdc -) to another.

I know that this has been done with the larger Meanwells, and in HP server racks where these very units are combined.  The Meanwells don't require it, but ... I am trying to figure out if the HP PS units require a common control line.  If so, which of the connections on the back of the PS gets connected to each?

If you have used multiple HP Server PS units, in a bus/parallel, did you have a third line connected between each PS?

Thanks in Advance!

ALG
Sequencers: Vixen3 and xLights
Players: FPP and xSchedule Controllers:  Renards - SS24/SS16; E1.31 - San Devices E682 - Falcon F16, F4, F48 - J1Sys - DIYLEDExpress E1.31 Bridges.  Much more!

gunther

One thing to keep in mind is that if one of the power supplies fails in a way that causes that supply to short VCC to ground, the rest of your supplies will not like it.   Best case is they shut themselves down, worst case is a Lotta amps from the other supplies all going through a short that is probably glowing red and burn things.

algerdes

A thought to keep in mind, for sure.  Thanks.
Sequencers: Vixen3 and xLights
Players: FPP and xSchedule Controllers:  Renards - SS24/SS16; E1.31 - San Devices E682 - Falcon F16, F4, F48 - J1Sys - DIYLEDExpress E1.31 Bridges.  Much more!

pixelpuppy

Quote from: gunther on July 06, 2021, 08:02:29 PMcauses that supply to short VCC to ground, the rest of your supplies will not like it.   Best case is they shut themselves down
I'm pretty sure that all power supplies which support paralleling also have over-current protection built in.  

Anything is possible, I guess, but that is a failure mode that is extremely unlikely in the real world.  


Quote from: gunther on July 06, 2021, 08:02:29 PMworst case is a Lotta amps from the other supplies all going through a short that is probably glowing red and burn things.
That's what fuses are for.   If you don't fuse your high-current DC power feeds then that's a risk you choose to take.
-Mark

algerdes

My thought process is something along the same.  The scenario of Vcc going to ground must have been taken into account when multiples of these are put into a server.  It is time to find the schematic for them and look for a shutdown system.

Besides, every power supply I have had "go bad" simply opened up.  I don't have one instance of a short.  Then again, we must plan for it.
Sequencers: Vixen3 and xLights
Players: FPP and xSchedule Controllers:  Renards - SS24/SS16; E1.31 - San Devices E682 - Falcon F16, F4, F48 - J1Sys - DIYLEDExpress E1.31 Bridges.  Much more!

Support FPP

+- Recent Topics

Trying to configure LOR CF50D Floods on FPP Pi Player with PiCap by tbone321
Today at 06:35:53 PM

wifi issues on BBB running fpp v6.3 by bert-nc
Today at 05:39:35 PM

raspberry PI 3 / PI 4 by mrfix1
Today at 07:13:55 AM

help getting started, next step? by K-State Fan
Today at 04:42:36 AM

Bug in newest release by tbone321
January 26, 2023, 06:14:26 PM

Cannot Connect to F48V4-NS Through Rasberry Pi by Poporacer
January 26, 2023, 03:13:43 PM

new piCaps in the works? by Bwinter
January 26, 2023, 11:25:32 AM

DIY voucher request by CaptainMurdoch
January 26, 2023, 11:14:38 AM

Which volume to grow during setup? by RickR
January 26, 2023, 09:55:17 AM

F16v3 Won't boot or power on by chiefwarrant
January 26, 2023, 06:56:34 AM

Powered by EzPortal
Powered by SMFPacks Menu Editor Mod