Rcd Auto - Rcd Auto Test - METREL EurotestXC MI 3152 Instruction Manual

MI 3152(H) EurotestXC (2,5 kV)
RCD Auto – RCD Auto test
7.8
RCD Auto test function performs a complete RCD test (trip-out time at different residual
currents, trip-out current and contact voltage) in one set of automatic tests, guided by the
instrument.
RCD Auto test procedure
RCD Auto test steps
Enter the RCD Auto function.

Set test parameters / limits.

Connect test cable to the instrument.

Connect test leads or Plug commander to the object

under test, see Figure 7.27
Start the measurement.

Test with I , (+) positive polarity (step 1).
N
Re-activate RCD.

Test with I , (-) negative polarity (step 2).
N
Re-activate RCD.

Test with 5I , (+) positive polarity (step 3).
N
 Re-activate RCD.
Test with 5I , (-) negative polarity (step 4).
N
Re-activate RCD.

Test with ½I
, (+) positive polarity (step 5).
N
Test with ½I
, (-) negative polarity (step 6).
N
Trip-out current test, (+) positive polarity (step 7).
Re-activate RCD.

Trip-out current test, (-) negative polarity (step 8).
Re-activate RCD

Trip-out current test for d.c. part, (+) polarity (step 9).
Re-activate RCD

Trip-out current test for d.c. part, (-) polarity (step 10).
Re-activate RCD.

Save results (optional).
1) Steps 9 and 10 are performed if parameter Use is set to 'other' and Type to EV RCD or
MI RCD.
Step 1
1)
.
1)
.
Notes
Start of test
RCD should trip-out
RCD should trip-out
RCD should trip-out
RCD should trip-out
RCD should not trip-out
RCD should not trip-out
RCD should trip-out
RCD should trip-out
RCD should trip-out
RCD should trip-out
End of test
108
Tests and measurements
Step 2