Re: [RE-wrenches] DC disconnect placement

2009-12-21 Thread Matt Lafferty
...@sunenergypower.com] Sent: Sunday, December 20, 2009 9:49 PM To: gilliga...@gmail.com; 'RE-wrenches' Subject: RE: [RE-wrenches] DC disconnect placement Hello all, While this may be excellent advice, I think it would be good to clarify that this may apply primarily to grid tied systems. I

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread Walt Ratterman
enches-boun...@lists.re-wrenches.org] On Behalf Of Matt Lafferty Sent: Sunday, December 20, 2009 4:10 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] DC disconnect placement William, Put the inverters at the array. Run the AC underground. If the AC feeder gets dug up by some rowdy

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread Richard L Ratico
Sent: Sunday, December 20, 2009 12:29 PM To: RE-wrenches Subject: Re: [RE-wrenches] DC disconnect placement Dick: We are gong to install HU361 disconnects at the PV. Touch-safe fuse holders are one way to apply disconnecting means rated at 600 VDC to a Sola Deck device. Fusing at an array and G

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread Matt Lafferty
to a dead short. Cheers, Matt Lafferty _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Sunday, December 20, 2009 11:02 AM To: RE-wrenches Subject: [RE-wrenches] DC disconnect placement Friends

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread Bill Brooks
Bill. From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Miller Sent: Sunday, December 20, 2009 12:29 PM To: RE-wrenches Subject: Re: [RE-wrenches] DC disconnect placement Dick: We are gong to install HU361 disconnects at t

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread ryan
I to agree it is nice to have a disconnect means at the pv array. I worry that touch safe fuses may give some one the wrong idea as they are not safe to open under load. they will catch on fire. I like the combiner with disconnect idea and I know there is a Huge player in the combiner market th

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread William Miller
Dick: We are gong to install HU361 disconnects at the PV. Touch-safe fuse holders are one way to apply disconnecting means rated at 600 VDC to a Sola Deck device. Fusing at an array and GFDI at an inverter do not de-energize PV feeders. Combiner fuses, if required, protect only adjacent arra

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread Glenn Burt
ts.re-wrenches.org] On Behalf Of William Miller Sent: Sunday, December 20, 2009 2:02 PM To: RE-wrenches Subject: [RE-wrenches] DC disconnect placement Friends: I am embarking on a 10 Kw ground mount grid-tie installation. The client prepared for this installation some time ago by stubbing a PVC co

Re: [RE-wrenches] DC disconnect placement

2009-12-20 Thread Richard L Ratico
William, Not sure I understand how buried PV runs protected by touchsafe fuses in combiner boxes at the array and GFCI protection at the inverters constitute a fire hazard. That's not saying I disagree with your disconnect here. I don't. If it was a 1kW system, would you still install one? I would

[RE-wrenches] DC disconnect placement

2009-12-20 Thread William Miller
Friends: I am embarking on a 10 Kw ground mount grid-tie installation. The client prepared for this installation some time ago by stubbing a PVC conduit underground towards the future location of the PV array. Prior to beginning this job, an excavation contractor intercepted the empty condui