MI 3152(H)
Eurotest
XC (2,5 kV)
Tests and measurements
142
7.22
IMD – Testing of insulation monitoring devices (MI
3152 only)
This function checks the alarm threshold of insulation monitor devices (IMD) by applying a
changeable resistance between L1/PE and L2/PE terminals.
Figure 7.75: IMD test menu
Test parameters / limits
Test
Test mode
[MANUAL R, MANUAL I, AUTO R, AUTO I]
t step
Timer (AUTO R and AUTO I test modes)
[1 s ... 99 s]
Rmin(R1,R2)
Min. insulation resistance
[Off, 5 k
... 640 k
],
Imax(I1,I2)
Max. fault current
[Off, 0.1 mA ... 19.9 mA]
Connection diagram
Figure 7.76: Connection with 3-wire test lead