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MI3002 MI3100 MI3102 IT supply systems
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Displayed results:
ISC1 ..........First fault current between L1-PE,
ISC2 ..........First fault current between L2-PE.
Save displayed results for documentation purposes. Refer to chapter 6.1.
Saving results.
B.3.5 Insulation monitoring device testing (MI 3102 only)
How to check insulation monitoring device
Step 1 Select Insulation function with the function selector switch first. Use the ¿/À
keys to select IMD check function. The following menu is displayed:
Figure B.7: IMD check menu
Connect test cable to the EurotestXE instrument.
Step 2 Set the following limit value:
o Fault resistance (indicative)
o Calculated first fault current high limit value.
Step 3 Connect test cable to the item under test. Follow the connection diagram
shown in figure B.5 to check insulation monitor device. Use the Help function
if necessary.
Step 4 Check the displayed warnings and online voltage/terminal monitor before
starting the measurement. If OK, press the TEST key. Use the ½/¾ keys to
decrease indicative insulation resistance until insulation monitor device
alarms bad insulation. Indicative insulation resistance and calculated first fault
current between first live conductor (e.g. L1) and PE conductor are displayed.
After performing the measurement results with PASS/FAIL indication appear
on the display.
Figure B.8: First fault condition between L1 and PE
94


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