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MI 3152(H)
Eurotest
XC (2,5 kV)
Tests and measurements
121
7.21
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 7.71: 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 7.72: Connection with 3-wire test lead