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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>I’d
like to see if we can complete the thread on insulation testers (Meggers).
Below is a copy of Bill Brooks last posting on this subject from several weeks
ago. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Bill
says the keys are to use the tester and in “performing the tests properly
and safely which requires test procedures”. What are the proper testing
procedures? We have a Fluke 1503 and the information that came with it is not
very helpful in setting up a testing procedure. The DVD that came with it is
more of a sales tool on why you should have the tool. We already have the tool.
We want to know how to use the tool. Can anybody give advice on this?<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><<
I bought two insulation testers (Megger is a brand name) in April. A used<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Fluke
1520 off Ebay for $275 and a new inexpensive (cheap) insulation tester<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>on
Amazon (Electronic Specialties 550 Insulation Tester for $162). Both work<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>fine.
The Fluke has better accuracy that I need for very specialized "field<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>wet
resistance testing" (FWRT). However, the cheap tester works great for<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>finding
faults in conductors and severe faults in modules. <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>I
bought both to determine if a cheap meter would work and the answer is<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>YES.
The key is performing the tests properly and safely which requires test<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>procedures.
The other key to actually use the tester. Several people own<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>these
devices, but never use them. They should be used on every installation<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>after
the wire is installed to determine if any wire damage is visible to<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>the
tester. Even though this will not solve all field mistakes, it will<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>catch
the marginal problems that may be too small to be detected by the GFP<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>circuit
in the inverter.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>Bill.
>><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><i>David Palumbo<o:p></o:p></i></p>
<p class=MsoNormal><i>President, Independent Power LLC<o:p></o:p></i></p>
<p class=MsoNormal><i>462 Solar Way Drive, Hyde Park, VT 05655<o:p></o:p></i></p>
<p class=MsoNormal>NABCEP Certified<o:p></o:p></p>
<p class=MsoNormal><i>www.independentpowerllc.com <o:p></o:p></i></p>
<p class=MsoNormal><i>(802) 888-7194<o:p></o:p></i></p>
<p class=MsoNormal><o:p> </o:p></p>
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