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MI 3152(H) EurotestXC (2,5 kV)
Connection diagram
Measurement procedure
Enter the AUTO IT function.
Set test parameters / limits.
Measure the impedance Zref at origin (optional), see chapter
7.14 Voltage Drop.
Connect test cable to the instrument.
Connect test leads to the object under test, see Figure 7.94.
Start the Auto test.
Save results (optional).
Figure 7.95: Examples of AUTO IT measurement results
Measurement results / sub-results
Uln
Voltage between phases L1 and L2
ΔU
Voltage drop
Isc1
First fault leakage current at single fault between L1/PE
Isc2
First fault leakage current at single fault between L2/PE
R1
Threshold insulation resistance between L1-PE
R2
Threshold insulation resistance between L2-PE
I1
Calculated first fault leakage current for R1
I2
Calculated first fault leakage current for R2
Z (LN)
Line impedance
Zref
Reference Line impedance
Ipsc (LN)
Prospective short-circuit current
Figure 7.94: AUTO IT measurement
156
Tests and measurements
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