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1. 5.18 DAR en PI testmethode
Firstly, short press MAX/MIN in the lnsulation switch,
then press LOCK button. Secondly, press INSULATION
TEST button to start the test of DAR and Pl. One minute
later, the test results of DAR will show on the screen. PI
test results will show on the screen alter 10 minutes.
The reference value of DAR and PI are as following:
PI standard
PI value
Tested material status
2-4 (typically 3)
Considered as good
insulation (older types)
1-1.5
Not acceptable (older
types)
1
(very high insulation re-
sistance) Modern type of
(good) insulation system
1.0 or less
Fail
Example: If the reading of B-class insulation material is
100 M in 1 minute, 110 MΩ in 10 minutes, polarization
index is 1.1 (110 mΩ/100 MΩ= 1.1 ). As the insulating
material contains too much water or seriously polluted,
the polarization index is below the minimum acceptable
value, you need to repair or replace parts.
DAR standard
DAR value
Tested material status
1.6 or more
Excellent
1.25-1.6
Pass
<1.25 or less
Fail
