HT instruments MACROTEST 5035 - Manual (Page 26)

MACROTEST 5035
EN - 25
If the parameters set on the instrument are consistent with the kind of RCD under test
(and if the latter works properly) the ramp test “ ”
SHALL CAUSE THE RCD TRIPPING
WITH A CURRENT LOWER THAN OR EQUAL TO THE SELECTED RATED
DIFFERENTIAL CURRENT. This test is not used to be effected to compare the RCD
tripping time at the tripping current, while the standards refer to the maximum tripping
times in case the RCD is checked with a leakage current equal to the rated current.
4.3.1.5. Mode
"U
t
"
4. Press the
START/STOP key once: the instrument carries out the
test.
If the RCD
does NOT trip the
instrument emits a double sound
signal indicating the positive
outcome of the test and displays the
screen alongside.
RCD
~
1.4
V
OK
Ι
∆N
30
m
A
49
Ω
U
t
0° U
L
=
50 V
SAVING: The tests can be stored pressing the SAVE key twice
(according to paragraph 5.1).
4.3.2. Tripping times for the general and selective RCDs
If the parameters set on the instrument are in keeping with the type of RCD under test
(and if this works correctly) the test with leakage current I
∆N x1, I ∆N x2, I ∆N x5
SHALL
cause the RCD tripping within the times set according to the following table:
RCD type I
∆N
x 1 I
∆N
x 2 I
∆N
x 5 Description
General 0.3s 0.15s 0.04s
Max tripping time in seconds
Selective
S
0.5s 0.20s 0.15s
Max tripping time in seconds
0.13s 0.05s 0.05s
Minimum delay tripping time in
seconds
* For rated values I
∆N ≤ 30mA the test current at five times is 0.25A.
For currents equal to ½ I ∆N the RCD shall not trip in any case.
Tripping times for tests with leakage currents I
∆N
x1, I
∆N
x2, I
∆N
x5 and AUTO.
Value of earth resistance R
a
. The display of the
message " o.r." means that the instrument detected
a resistance higher than 1999
Ω.
Value of contact voltage U
t
detected referred to the
rated value of the RCD current set.
It indicates if the
test was carried
out with current
phase 0° or 180°
with respect to
the voltage.
SAVE
OK: indicates that
the RCD passed
the test.
or RCD
START
STOP