MI 3102(H) BT
Eurotest
XE
Measurements
48
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Figure 5.24: Individual steps in RCD auto-test
Top
Bottom
Figure 5.25: Two parts of result field in RCD auto-test
Displayed results:
x1
......... step 1 trip-out time (I
=I
N
, 0º)
x1
......... step 2 trip-out time (I
=I
N
, 180º)
x5
......... step 3 trip-out time (I
=5
I
N
, 0º)
x5
......... step 4 trip-out time (I
=5
I
N
, 180º)
x½
........ step 5 trip-out time (I
=
½
I
N
, 0º)
x½
........ step 6 trip-out time (I
=
½
I
N
, 180º)
I
......... step 7 trip-out current
(0º)
I
......... step 8 trip-
out current (180º)
Idc ........ step 9 trip-out current (+ DC)
Idc ........ step 10 trip-out current (- DC)
Uc
........ contact voltage for rated I
N
Notes:
The auto-test sequence is immediately stopped if any incorrect condition is detected,
e.g. excessive Uc or trip-out time out of bounds.
Auto test is finished without x5 tests in case of testing the RCD types A and F with rated
residual currents of I
N
= 300 mA, 500 mA, and 1000 mA. In this case auto test result
passes if all other results pass, and indications for x5 are omitted.
Tests for sensitivity (I ,, steps 7 and 8) are omitted for selective type RCD.
Trip out time measurement for B and B+ type RCDs in AUTO function is made with sine-
wave test current, while trip-out current measurement is made with DC test current (MI
3102 BT only).
