MARTINDALE ET4500 - Page 44

Martindale ET4000 / ET4500 Measurements
44
Step 3 Step 4
Step 5 Step 6
Step 7 Step 8
Figure 5.23: Individual steps in RCD autotest
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Figure 5.24: Two parts of result field in RCD autotest
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)
Uc........ contact voltage for rated I

N
Notes:
 The autotest sequence is immediately stopped if any incorrect condition is
detected, e.g. excessive Uc or trip-out time out of bounds.
 The auto test finishes without the x5 tests when testing RCD types A and F with
rated residual currents of I
N
= 300 mA, 500 mA, and 1000 mA. In this case the
auto test result passes if all other results pass, and the indications for x5 are
omitted.
 Tests for sensitivity (I ,, steps 7 and 8) are omitted for selective type RCD's.
 The autotest sequence (RCD AUTO function) stops when the trip-out time is
outside the allowable time period.