MI 3109 EurotestPV Lite
Measurements
32
5 Measurements
5.1 Insulation resistance
The Insulation resistance measurement is performed in order to ensure safety against
electric shock through insulation between live parts on PV installations and earth.
The measurement is carried out according to test method 1 in IEC / EN 62446 (test
between panel / string / array negative and earth followed by a test between panel /
string / array positive and earth).
See chapter 4.2 Function selection for instructions on
key functionality. The input voltage is displayed.
Figure 5.1: Insulation resistance
Test parameters for insulation resistance measurement
TEST
Roc-
,
Roc+
Uiso
Test voltage
[50 V, 100 V, 250 V, 500 V, 1000 V]
Limit
Minimum insulation resistance
[OFF, 0.01 M
÷ 200 M
]
Connection for insulation resistance measurement
Figure 5.2: Connection for insulation measurement with universal PV test lead
