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Multifunction PV Analyzer
Te s t S e tu p
31
The dashes show during the measurement calculation and then the test results show on
the display:
Live Results: measurement results refresh every second.
Green check mark appears when result is under the limit.
5. Push
>1 s. at any time to pause and hold the measurement on the screen.
6. Push
>1 s. again to resume measurement.
7. Move test leads up and down the cable until you find the resistance issue:
shows on the display next to measured resistance that is below the limit.
multiple beeps indicate the test failed.
8. Push
to save the results to memory.
A confirmation message with ID number shows on the display and then returns to the test
screen.
OR
9. Connect to the next test point (not necessary to clear if you do not save) or proceed to the
next test.
Wet Insulation Resistance Test
The wet insulation resistance test meets IEC 62446-1 Clause 8.3 requirements and is best
used as a fault-finding exercise. This resistance test evaluates the PV Array electrical
insulation in wet operating conditions. The test simulates rain or dew on the array and wiring
and then verifies that moisture will not enter active portions of the array electrical circuitry
where it may enhance corrosion, cause ground faults, or pose an electrical safety hazard to
personnel or equipment. This test is especially effective for finding above ground defects such
as wiring damage, inadequately secured junction box covers, and other similar installation
issues. It also may be used to detect manufacturing and design flaws including polymer
substrate punctures, cracked junction boxes, inadequately sealed diode cases, and improper
(indoor rated) connectors.
A wet insulation test would be implemented when the results of a dry test are questionable or
where insulation faults due to installation or manufacturing defects are suspected.
The test is applied to a whole array or on larger systems to select parts such as components or
sub-sections of the array. Where only parts of the array are being tested, these are selected
due to a known or suspected problem identified during other tests. In some circumstances, the
wet insulation test may be requested on a sample portion of the array.
Use the same test sequence in Test Method 1 (Keep the Leads) or Te s t M e th o d 2 ( De fa ul t ) .
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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