MI 3108 EurotestPV
Solar measurements
– PV systems
70
Test circuits for insulation resistance on PV systems
Figure 6.2: Connections for insulation resistance measurement on PV systems
Insulation resistance measuring procedure
Select the
Roc-
sub-function using the function selector keys and
/
keys.
Set the required
test voltage
.
Enable and set
limit
value (optional).
Connect
PV safety probe to the instrument (see figure 6.2)
Connect
accessories to the PV system (see figure 6.2).
Press the
TEST
key to perform the measurement (double click for continuous
measurement
and later press to stop the measurement).
After the measurement is finished wait until tested item is fully discharged.
Store
the result by pressing the MEM key (optional).
Select the
Roc+
sub-function using the
/
keys.
Reconnect
DC+ lead (see figure 6.2).
Press the
TEST
key to perform the measurement (double click for continuous
measurement
and later press to stop the measurement).
After the measurement is finished wait until tested item is fully discharged.
Store
the result by pressing the MEM key (optional).
Figure 6.3: Examples of insulation resistance measurement result
Displayed results:
Roc+, Roc...........Insulation resistance
Um......................Test voltage
– actual value.
U: ...................... Actual voltage on test inputs
