Does everything power normally prior to the fuse blowing? Does the ptp600 power and ping? Is the fuse properly sized?
On Wed, Oct 7, 2015 at 2:22 PM, David <[email protected]> wrote: > We have to use the duracom dc dc isolators for them but no issues once we > do it. > Basically same thing using meanwell product. > > > > > On 10/07/2015 03:29 PM, Gino Villarini wrote: > > no, will try- > > On Wed, Oct 7, 2015 at 4:27 PM, Josh Baird <[email protected]> wrote: > >> 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? >>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> > >
