30
Symptom
Cause
Action
of the tripping time for
the same RCD.
measurements with
opposite polarities of
differential current.
Performing t
A
or I
A
measurement is
impossible.
Contact voltage, which
is generated during t
A
or
I
A
measurement, may
exceed the value of safe
voltage - then the
measurement is
automatically blocked.
Check the connections of
the protective conductor
Verify the selection of
RCD in relation to the
rated differential current.
The set value of I
n
is to
high.
Set correct I
n
.
Unstable measurement
result foe U
B
or R
E
, i.e.
the results of
successive
measurements
performed at the same
point of installation differ
significantly from each
other.
Significant leakage
currents have high
variability.
Symbol
does not
appear, although the
voltage between the
contact electrode and
PE
conductor exceeds
the detector threshold
(about 50V).
Contact electrode is not
functioning correctly or
the meter input circuits
are damaged.
Return the meter for
servicing; using a
malfunctioning meter is
unacceptable
