LA 302's [RE-wrenches]

[Kurt Nelson, SunWise]

At 11:11 PM 7/10/00 -0700, you wrote:
>Seems that someone told me that there was no difference between the DC and
>AC, LA302's anybody else heard anything similar?
>
>Later,
>Bob

I spoke with a techie at Delta and I asked him specifically if there was any
internal difference between the 302R and the DC and he said "no".  Always
possible he didn't know or didn't understand my question fully.  Seems like
the DC would/should have lower clamping limits than the three wire single
phase 600 volt unit.  Also, I've heard the color coding of the wires is
almost a non-issue.  Something like they all clamp together at a given
voltage threashold?  On the same note, it sure would be helpful if Trace,
upon repairing a lightning damaged unit, explained which side of the
inverter the surge came in on.  Wouldn't that be fairly apparent? -- Kurt
Nelson, SOLutions

>
>-----Original Message-----
>From:	Mark Downing [mailto:solarman4 at yahoo.com]
>Sent:	Monday, July 10, 2000 11:36 PM
>To:	RE-wrenches at topica.com
>Subject:	Re: comments to TRACE [RE-wrenches]
>
>Since most of my woes were from toasted DR series
>inverters, I started just hanging the LA302DC on the
>DC end of the inverter.  Green wire to the inverter's
>ground lug, pos and neg to the inverter's DC input
>terminals.  I haven't used many LA302Rs, except when
>there is a long ac run to another building.
>
>--- "Chuck Heath, SunPower" <sunpwr at jps.net> wrote:
>> Mark Downing <solarman4 at yahoo.com> said...
>> >Since I started using Delta lightning
>> >arrestors we are having much better luck, but still
>> >a handful of lightning related failures per year.
>>
>> I've always used them at the combiner box of the PV
>> array(s) but not on
>> the AC side. Are you using them similarly, or on
>> both the AC and DC sides?
>
>
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