[RE-wrenches] Testing LSAs

[North Texas Renewable Energy Inc]

For the first time since 2004 we got a residential PV red tag for non-listed
surge supressors. I just took them off and replaced them after we got the
green tag. Of course he also red-tagged the copper ground plate because it
was not thick enough. Go figure....

Jim Duncan
North Texas Renewable Energy


  -----Original Message-----
  From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org]On Behalf Of Andrew Truitt
  Sent: Tuesday, August 31, 2010 8:09 PM
  To: RE-wrenches
  Subject: Re: [RE-wrenches] Testing LSAs




  Question: Since the Delta lightning arrestors are not UL Listed, do they
threaten the UL compliance of the PV system as a whole?


  - Andrew Truitt
  Currently of Standard Solar
  Free agent in the Denver area as of 10/6/10




  On Tue, Aug 24, 2010 at 6:02 PM, Peter Parrish
<peter.parrish at calsolareng.com> wrote:

    I would think that an ohmmeter set to the 10 Mega-ohm setting (or the
    highest setting possible), would be the first test. I would like to see
    something on the order of 750 k-ohms (3/4 of a mega-ohm).

    But the system should be tested at a higher voltage, than that available
    from a DMM. Apply 240 Vac and measure the RMS current. It should be
should
    be 0.3 mA or less.

    Finally, these puppies really need to be tested at much higher voltages,
    perhaps someone knows how to use that megohmmeter to test? What does the
    manu recommend, “if suspect, throw it away and buy a new one”?

    - Peter

    Peter T. Parrish, Ph.D., President
    California Solar Engineering, Inc.
    820 Cynthia Ave., Los Angeles, CA 90065
    CA Lic. 854779, NABCEP Cert. 031806-26
    peter.parrish at calsolareng.com
    Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885


    ________________________________________
    From: re-wrenches-bounces at lists.re-wrenches.org
    [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of
Kristopher
    Schmid
    Sent: Tuesday, August 24, 2010 1:30 PM
    To: 'RE-wrenches'
    Subject: [RE-wrenches] Testing LSAs


    What is the best method for testing the integrity of a DC and/or AC
    lightning surge arrestor?  Specifically, i use the Delta LA units.  I
know
    they should be replaced if they look Bar-B-Qued, but otherwise...?

    Thanks,
    Kris Schmid

    Legacy Solar
    864 Clam Falls Trail
    Frederic, WI 54837
    715-653-4295
    solman at legacysolar.com
    www.legacysolar.com



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  --
  "Don't get me wrong: I love nuclear energy! It's just that I prefer fusion
to fission. And it just so happens that there's an enormous fusion reactor
safely banked a few million miles from us. It delivers more than we could
ever use in just about 8 minutes. And it's wireless!"

  ~William McDonough

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