MI 3321 MultiservicerXA
Machine testing operating mode
132
Test circuit for RCD tests
RCD tests (machine testing)
9.2.6.1
Contact voltage (RCD Uc)
The contact voltage test verifies that RCDs and earthing arrangement are effective. The
contact voltage is measured with a test current lower
than ½ I
N
to avoid trip-out of the
RCD and then normalized to the rated I
N
.
Contact voltage measurement procedure
Select the
RCD Uc
test.
Set test
parameters
.
Connect
three wire test lead to the TP1 test port on the instrument.
Connect
the three wire test lead to L,N (downstream of the RCD) and PE terminals
of the machine.
Press the
START
key for the measurement.
Press
SAVE
(F4) key for storing the result (optional).
