Omicron CIBANO 500 PTM - 17.1.10 Insulation Resistance Test

OMICRON 159
Off-service diagnostic methods
17.1.10 Insulation Resistance test
The Insulation Resistance test is used to import or enter data from an insulation testing device.
Table 17-30: Insulation Resistance test settings
Setting Description
Test conditions
Test object temperature Temperature of the test object
Custom test conditions Activate the Custom test conditions check box to set test conditions
differing from the global test conditions.
Ambient temperature Ambient temperature on site
Humidity Relative ambient humidity
Calculations
PI calculation Calculation of polarization index
Time 1 In the standard PI calculation, the testing device is applied and insulation
resistance measurements are taken after 60 seconds (Time 1) and 600
seconds (Time 2).
The polarization index (PI) is calculated as follows:
Time 2
DAR calculation Calculation of dielectric absorption ratio
Time 1 In the standard DAR calculation, the testing device is applied and
insulation resistance measurements are taken after 30 seconds (Time 1)
and 60 seconds (Time 2).
The dielectric absorption ratio (DAR) is calculated as follows:
Time 2
Correction factors
Temperature correction Select the Temperature correction check box to activate temperature
correction.
Correction temp. Temperature correction factor
PI
R
600
R
60
-----------
=
DAR
R
60
R
30
--------
=