Have you tried isolating the PTP600 with a DC/DC converter (Meanwell RSD, etc) in between the rectifier and PIDU?
On Wed, Oct 7, 2015 at 4:24 PM, Gino Villarini <[email protected]> wrote: > 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 <[email protected]> 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 <[email protected]> >> *Sent:* Wednesday, October 07, 2015 2:17 PM >> *To:* [email protected] >> *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 <[email protected]> wrote: >> >>> Is the chassis of the PIDU or the PTP600 connected to your common ground? >>> >>> *From:* Gino Villarini <[email protected]> >>> *Sent:* Wednesday, October 07, 2015 2:14 PM >>> *To:* [email protected] >>> *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? >>> >>> >>> >> >> > >
