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● Check the connection if
symbol is displayed in the LCD. Connection may
be incorrect and a test doesn’t start even RCD switch is pressed.
●
If " IΔn" setting is greater than the rated residual current of the RCD, the RCD
will trip and "no" may be displayed on LCD.
●
Special conditions of RCDs of a particular design, for example S- type, should
be taken into consideration.
(2) PRCD test via socket outlet
Make connection as the following illustration indicates when testing a PRCD
connected to a socket outlet. For this test, use EZYEXT for connection.
● If a fault voltage exceeds 50 V while applying a test current to test a built-in type
RCD, the LCD shows “Uf. Hi” and the test is halted.
●
If a voltage exists between the protective conductor and earth, it may influence
the measurements.
●
If a voltage exists between neutral and earth, it may influence the
measurements, therefore, the connection between neutral point of the distribution
system and earth should be checked before testing.
●
The potential fields of other earthing installations may influence the
measurement.
●
The earth electrode resistance of a measuring circuit with a probe shall not
exceed table1.
●
Equipment following the RCD, e.g. capacitors or rotating machinery, may cause
a significant lengthening of the measured trip time.
EZYEXT
Press the RCD switch to
perform RCD test.
PRCD
