SW has discovered lightning [RE-wrenches]

[Matt Tritt]

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William and Ray,

I assume that the Other brand you refer to is the same as the one that I
(mercilessly) reported on while doing a quad stack? If so, we noted a
similar phenomenon with that system as well. There was enough current to
ground with no loads to measure over one amp. I never would have noticed
except that I removed the ground lead to better route it in the AC
disconnect box. Nice spark!

I still don't understand why there was any current flow to ground, but
the system works beyond my expectations anyway. Lucky me!

Maybe it just wouldn't be alternative energy without alternative
behavior?

Matt T

-----Original Message-----
From: William Korthof [mailto:wkorthof at earthlink.net] 
Sent: Monday, May 17, 2004 12:06 PM
To: RE-wrenches at topica.com
Subject: Re: SW has discovered lightning [RE-wrenches]


 

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Wow,

Could it be, another reason to switch OUT the inverter
to another brand that gives you BACK the reliability
and performance you want and expect?

/wk


At 10:00 AM 5/17/2004, Ray Walters wrote:


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>
>Hopefully this is a related subject....
>
>I just installed a SW2548+ and found that I had 0.35 amps AC current
>running down the chassis ground, Voltage when I unbonded the nuetral
was 
>60 vac Ground to nuetral. No, I didn't have nuetral bonded in more than

>one place , ground loops, etc. These same measurements where with 
>everything AC disconnected from the inverter at its output terminals.
NO, 
>the amps didn't dissipate with time unloading a filtering capacitor .
It 
>was steady. Meter was a Fluke 89 inserted in the circuit.
>
>Trace said it was normal operation of the filtering, and that if I
>measured it with a clamp on meter it would "disappear". Yea I said
because 
>clamp-on meters aren't accurate below an amp....
>I said that the NEC doesn't allow current to flow on uninsulated ground

>wires. They told me to look at the inverter again to confirm if it had
a 
>UL sticker on it.....
>
>So what do you think, is there a problem, or should I put my meter away
>and be quiet? ( I found the "problem", when I disconnected  the
inverter 
>chassis ground for a moment and drew a healthy arc.)
>Seems to have some fire hazard / electrocution potential, especially
when 
>we're supposed to ground 12 vdc etc, etc..  Is this another: "Trace
payed 
>UL enough to pass this, but we can't do the same thing in the field
deal"?
>
>Ray
>
>>I have done with my inverter that I suppose not is not kosher is not 
>>ground the chasis to any ground whatsoever. It is like the inverter 
>>shuts off to protect itself.
>>
>>SUNcerely,
>>Frank Fowler
>
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