Caution – HT instruments SIRIUS89N User Manual
Page 27
SIRIUS89N
EN - 25
leakage currents) it is advisable to effect the test both with sine wave and
unidirectional pulse current with phase 0° and 180°.
The
F2 key permits to select one of the following rated tripping currents of the
RCD (which can be shown cyclically when pressing the key):
10mA.
30mA.
100mA.
300mA.
500mA.
The
F3 key permits to select the RCD type (which can be shown cyclically
when pressing the key):
"
b
":
general RCD AC type (sensitive to sine leakage current)
"
l
":
general RCD A type (sensitive to pulsating leakage current)
"
bn
": selective RCD AC type (sensitive to sine leakage current)
"
ln
": selective RCD A type (sensitive to pulsating leakage current)
Note if the test is effected on general RCDs the symbol
n
is NOT displayed
Note according to EN61008 the test on the selective RCDs requires an interval between
the tests of 60 seconds (30 seconds in case of tests at ½ I
∆n
). A timer is displayed
indicating the waiting time for each step.
Example:
Test with AUTO mode on a RCD with I
∆n
=30mA.
a) the instrument effects the test at ½ I
∆n
0°. The RCD must not
trip.
b) The instrument effects the test at ½ I
∆n
180°. The RCD must
not trip. For a Selective RCD a 30 seconds timer starts
before executing next test.
c) The instrument effects the test at I
∆n
0°. If the RCD passed
the test, it must trip and the instrument shows the message
"RESUME RCD". The operator shall resume the RCD. For a
Selective RCD a 60 seconds timer starts before executing
next test.
d) The instrument effects the test at I
∆n
180°. Follow the same
procedure as described under c).
e) The instrument effects the test at 5I
∆n
0°. Follow the same
procedure as described under c).
f) The instrument effects the test at 5I
∆n
180°. Follow the same
procedure as described under c). The test is completed.
The F4 key permits to select one of the following
limit values for the
contact voltage (which can be shown cyclically when pressing the key):
50V
(default)
25V.
CAUTION
Never disconnect the test leads when the message
"MEASURING" is
displayed.