Re: [RE-wrenches] DC lightning arrestors

2010-04-16 Thread robert ellison 
I think that the high voltage unit is the 602, there are units available
from other manufacturers but they are a boat load of money and still require
prayer.

Bob

On Fri, Apr 16, 2010 at 6:31 PM, Marco Mangelsdorf wrote:

>  Is the best one can do as far as high DC array voltage the Delta LA602?
>
>
>
> Didn’t they used to have a high voltage version of the LA302DC?
>
>
>
> Thanks,
>
> marco
>
>
>
> [image: provision_highres_solar_logo2 with C-26351]
>
> Marco Mangelsdorf, President
> 69 Railroad Avenue, A-7
> Hilo, Hawai'i 96720
> (808) 969-3281, 934-7462 facsimile
> www.provision-solar.com 
>
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>
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Re: [RE-wrenches] DC lightning arrestors

2010-04-16 Thread Marco Mangelsdorf 
Amen, brother, and a women as well.

 

From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of robert
ellison
Sent: Friday, April 16, 2010 12:37 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] DC lightning arrestors

 

I think that the high voltage unit is the 602, there are units available
from other manufacturers but they are a boat load of money and still require
prayer.

 

Bob

On Fri, Apr 16, 2010 at 6:31 PM, Marco Mangelsdorf 
wrote:

Is the best one can do as far as high DC array voltage the Delta LA602?

 

Didn't they used to have a high voltage version of the LA302DC?

 

Thanks,

marco

 

provision_highres_solar_logo2 with C-26351

Marco Mangelsdorf, President
69 Railroad Avenue, A-7
Hilo, Hawai'i 96720
(808) 969-3281, 934-7462 facsimile
www.provision-solar.com <http://www.provisiontechnologies.com/> 

 

 


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Re: [RE-wrenches] DC lightning arrestors

2010-04-16 Thread R Ray Walters 
Marco;

Check out Citel, they make  a line of DIN rail mountable units for DC voltages 
up to 1000v. Prices are in the $100 to $200 range.
One at the combiner box, and one at the inverter, with ground rods at each 
location should give reasonable coverage.
I like Polyphasor's stuff too, but it is pricey (and weird to wire)
Also, some inspectors don't like the Deltas listing, and some require it to be 
wired into the system under it's own 2 pole breaker in the load center.

R. Walters
r...@solarray.com
Solar Engineer




On Apr 16, 2010, at 4:47 PM, Marco Mangelsdorf wrote:

> Amen, brother, and a women as well…
>  
> From: re-wrenches-boun...@lists.re-wrenches.org 
> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of robert ellison
> Sent: Friday, April 16, 2010 12:37 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] DC lightning arrestors
>  
> I think that the high voltage unit is the 602, there are units available from 
> other manufacturers but they are a boat load of money and still require 
> prayer.
>  
> Bob
> 
> On Fri, Apr 16, 2010 at 6:31 PM, Marco Mangelsdorf  
> wrote:
> Is the best one can do as far as high DC array voltage the Delta LA602?
>  
> Didn’t they used to have a high voltage version of the LA302DC?
>  
> Thanks,
> marco
>  
> 
> Marco Mangelsdorf, President
> 69 Railroad Avenue, A-7
> Hilo, Hawai'i 96720
> (808) 969-3281, 934-7462 facsimile
> www.provision-solar.com
>  
>  
> 
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Re: [RE-wrenches] DC lightning arrestors

2010-04-17 Thread Darryl Thayer 
This last week I spoke with a cell phone tower installer.  He said, Nothing beats the ground! he said the most important thing is the tower grounding, The idea of 25 Ohms to Ground is way to high.  Ground rods are useless, and lightning arresters do no good without a good ground, in fact people who worry about the lightning arrestor putting power back into there system have something to worry about if the ground is not good. 
 
So that is what he said and was very adimit about it. 
Darryl  --- On Fri, 4/16/10, Marco Mangelsdorf  wrote:
From: Marco Mangelsdorf Subject: [RE-wrenches] DC lightning arrestorsTo: "'RE-wrenches'" Date: Friday, April 16, 2010, 5:31 PM




Is the best one can do as far as high DC array voltage the Delta LA602?
 
Didn’t they used to have a high voltage version of the LA302DC?
 
Thanks,
marco
 

Marco Mangelsdorf, President69 Railroad Avenue, A-7Hilo, Hawai'i 96720(808) 969-3281, 934-7462 facsimilewww.provision-solar.com
 
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Re: [RE-wrenches] DC lightning arrestors

2010-04-17 Thread R Ray Walters 
I just recently bought a clamp on ground impedance tester. I found one system 
that was less than an ohm, worst  one was almost 800 ohms. Only a few were 
below 25 ohms. 
You're absolutely right: good lightning protection starts with a good ground.
The impedance tester takes the guess work out of just how good (or bad) the 
grounding is.
My theory is that in a poorly grounded system with everything tied together, 
that the strike (or induced surge) just oscillates back and forth through the 
system dissipating itself through the components of the system.

R. Walters
r...@solarray.com
Solar Engineer




On Apr 17, 2010, at 9:18 AM, Darryl Thayer wrote:

> This last week I spoke with a cell phone tower installer.  He said, Nothing 
> beats the ground! he said the most important thing is the tower grounding, 
> The idea of 25 Ohms to Ground is way to high.  Ground rods are useless, and 
> lightning arresters do no good without a good ground, in fact people who 
> worry about the lightning arrestor putting power back into there system have 
> something to worry about if the ground is not good. 
>  
> So that is what he said and was very adimit about it.
> Darryl  
> 
> --- On Fri, 4/16/10, Marco Mangelsdorf  wrote:
> 
> From: Marco Mangelsdorf 
> Subject: [RE-wrenches] DC lightning arrestors
> To: "'RE-wrenches'" 
> Date: Friday, April 16, 2010, 5:31 PM
> 
> Is the best one can do as far as high DC array voltage the Delta LA602?
> 
>  
> Didn’t they used to have a high voltage version of the LA302DC?
> 
>   
> Thanks,
> 
> marco
> 
>   
> 
> 
> Marco Mangelsdorf, President
> 69 Railroad Avenue, A-7
> Hilo, Hawai'i 96720
> (808) 969-3281, 934-7462 facsimile
> www.provision-solar.com
> 
>   
>  
> -Inline Attachment Follows-
> 
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