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Starting of RCD Test
If the condition of a faulty socket is to be saved,
first press key "Start" (22). Upon hearing the
"Error Signal" press the key "Store" (25).
5.2.4
Starting RCD Test with "RCD Tripping,
Function Auto"
For this test, the trip current I
sured. The contact voltage VC is measured during
the preliminary test at a current of 40%I∆N. The
RCD test is resumed after the successful prelimi-
nary test at a residual current, rising in steps of 10
% from 40 % I∆N until maximum 140 % I∆N. The
presently active residual current is indicated on the
display and in the event of the RCD tripping the trip
time of the RCD is meausured. The contact voltage
VC is evaluated for the trip current I
The method of the rising test current is not ne-
cessarily binding in compliance with VDE, ho-
wever represents a useful aid during trouble
shooting.
Test and measurement instruments within net-
works being protected by RCDs should only be
used after agreement with the final instrument
user (DP systems, process technology, mo-
tors, etc.).
I∆N:
If the contact voltage VC already exceeds the pre-
set contact voltage limit UL during the preliminary
test, the measurement is disabled and the "Attenti-
on" symbol (1) and "UB>UL" (3) is displayed.
14
of the RCD is mea-
.
Connect test lead / mains connection cable to
test instrument.
Connect test lead / mains connection cable to
the UUT, as described in figure 1 or 2.
Select desired measurement function (I
/tRCD/VC) using function selection switch (31).
Set nominal residual current selection (20) to
desired nominal current (depending on RCD).
No possibility to check selective RCDs.
Set phase position using 0°/180° key (24) and
current type by means of key (23).
Select contact voltage using key "VC/UL" (19).
Touch contact electrode PE (21). Note display.
If the symbol "Socket Error" (4) appears a PE
error is present.
Press key "Start" (22).
After a successful test, it is possible to select
between measurement results trip current I<,
trip time tRCD, and contact voltage VC in the
display (14) using display key (18).
I∆N:
Display trip current
I∆N:
Display trip time
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