But on the bench, the chassis was probably not grounded.
From: Gino Villarini
Sent: Wednesday, October 07, 2015 2:24 PM
To: af@afmug.com
Subject: Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
ill check, but we did a bench test and it did not replicate the issue
On Wed, Oct 7, 2015 at 4:19 PM, Chuck McCown <ch...@wbmfg.com> wrote:
If you put the PIDU and PTP600 on a cardboard box or other insulating
surface, can you see –48 VDC on their cases or chassis?
From: Gino Villarini
Sent: Wednesday, October 07, 2015 2:17 PM
To: af@afmug.com
Subject: Re: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
i think so, afaik is floating ground
On Wed, Oct 7, 2015 at 4:15 PM, Chuck McCown <ch...@wbmfg.com> wrote:
Is the chassis of the PIDU or the PTP600 connected to your common ground?
From: Gino Villarini
Sent: Wednesday, October 07, 2015 2:14 PM
To: af@afmug.com
Subject: [AFMUG] Issue with a -48 vdc Site! ground loop? Please Help!!
So we are moving a site form AC to DC -48
this is the setup:
Emerson Rectifier feeding:
Telco System MPLS router
Planet Fiber SW
2 Netonix DC Switches
2 SAF POE Injectors
2 PTP600 PIDUs
AFAIK all the mentioned gear above are floating ground
We have this gear connected to the Netonix: Airfiber24, Epmp, PMP450
all wireless gear is using shielded cable that is terminated in a WBMGF SS
on the rack
So this is the issue, we migrated everything to DC, when we connect the
PTP600 PIDU to the rectifier, the fuse on the emerson output feeding the
Netonix blows..not instantly.. it takes some 30-45 secs..
im scratching my head on this one... any ideas?
