MI 3152(H) EurotestXC (2,5 kV) Tests and measurements
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7.3 The DAR and PI diagnostic (MI 3152H only)
DAR (Dielectric Absorption Ration) is ratio of insulation resistance values measured after 15
seconds and after 1 minute. The DC test voltage is present during the whole period of the
measurement.
PI (Polarization Index) is the ratio of insulation resistance values measured after 1 minute and
after 10 minutes. The DC test voltage is present during the whole period of the measurement
For additional information regarding PI and DAR diagnostic, please refer to Metrel’s handbook
Modern insulation testing.
Figure 7.10: Diagnostic test menu
Measurement parameters / limits
Nominal test voltage [500 V, 1000 V, 2500 V]
Connection diagrams
Figure 7.11: Connection of 3-wire test lead and Tip commander (U
N
≤ 1 kV)
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