MI 3155
Eurotest
XD
Test and measurements
108
7.5
Varistor test
Measuring principle
A voltage ramp starts from 50 V and rises with a slope of 100 V/s (Range parameter set to 1000
V) or 350 V/s (Range parameter set to 2500 V). The measurement ends when the defined end
voltage is reached or if the test current exceeds the value of 1 mA.
Figure 7.17: Varistor test main menu
Measurement parameters / limits
I lim
Current limit
[1.0 mA]
System
System
[-, TT, TN, TN-C, TN-S]
Range
Test voltage range
[1000 V, 2500 V]
Low limit (Uac)
Low breakdown limit value @ 1000 V
range [Off, 50 V
… 620 V]
@ 2500 V
range [Off, 50 V
… 1550 V]
High limit (Uac)
High breakdown limit value
@ 1000 V
range [Off, 50 V
… 620 V]
@ 2500 V
range [Off, 50 V
… 1550 V]
Test circuit for Varistor test
Figure 7.18: Connection of 3-wire test lead and Tip commander (Range: 1000 V)
