METREL MI 3122 Instruction Manual page 29

MI 3122 Smartec Z Line-Loop / RCD
Step 5
Step 7
Displayed results:
x1 ....... Step 1 trip-out time (
x1 ....... Step 2 trip-out time (
x5 ....... Step 3 trip-out time (
x5 ....... Step 4 trip-out time (
x½ ...... Step 5 trip-out time (
x½ ...... Step 6 trip-out time (
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,
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e.g. excessive Uc or trip-out time out of bounds.
Auto test is finished without x5 tests in case of testing the RCD type A with rated
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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
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Figure 5.6: Individual steps in RCD autotest
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Figure 5.7: Two parts of result field in RCD autotest
, I  N, 0º),
, I  N, 180º),
, 5  I  N, 0º),
, 5  I  N, 180º),
, ½  I  N, 0º),
, ½  I  N, 180º),
, steps 7 and 8) are omitted for selective type RCD.
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Testing RCD
Step 6
Step 8
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