MI 3101 EurotestAT: Measurements
Testing RCD
56
5.3.4 RCD Autotest
RCD autotest function is intended to perform complete RCD testing and measurement of
belonging parameters (contact voltage, fault loop resistance and trip-out time at different
residual currents) in one set of automatic tests, guided by the instrument. If any false
parameter is noticed during the RCD autotest, then individual parameter test has to be
used for further investigation.
RCD autotest procedure
RCD Autotest steps
Notes
Select the
RCD
function.
Set sub-function
AUTO.
Set test
parameters
(if necessary).
Connect
test cable to the instrument.
Connect
test leads to the tested object (see
figure 5.13
).
Press the
TEST
key.
Start of test
Test with ½
I
N
, 0
(step 1).
RCD should not trip-out
Test with ½
I
N
, 180
(step 2).
RCD should not trip-out
Test with I
N
, 0
(step 3).
RCD should trip-out
Re-activate
RCD.
Test with I
N
, 180
(step 4).
RCD should trip-out
Re-activate
RCD.
Test with 5
I
N
, 0
(step 5).
RCD should trip-out
Re-activate
RCD.
Test with 5
I
N
, 180
(step 6).
RCD should trip-out
Re-activate
RCD.
After the measurement is finished
store
the result (optional).
End of test
Result examples:
Step 1
Step 2
