MI 3101 EurotestAT: Measurements
Varistor test
76
Varistor test procedure
Select the
VARISTOR TEST
function.
Set test
parameters
.
Disconnect mains supply and consumers from tested overvoltage device.
Connect
test cable to the instrument and tested item (see figure 5.47).
Press the
TEST
key for measurement.
After the measurement is finished wait until tested item is discharged.
Store
the result (optional).
Figure 5.48: Example of varistor test result
Displayed results:
U .............Measured threshold voltage at It (1 mA).
Uac .........Rated AC voltage.
Uac is calculated from U according to: Uac = U/1.6.
