HT instruments SPEED418 - Manual (Page 30)

400 Series
EN - 29
6.4.3. x1, x2, x5 mode
As an alternative:
5.
Press the GO/STOP key on the instrument or the START key on
the remote probe once. The instrument will start measuring with
a “0°” type current, injecting a current in phase with the positive
half-wave of voltage.
Or:
5.
Press the GO/STOP key on the instrument twice or the START key
on the remote probe before the hyphens disappear. The instrument
will start measuring with a “180°” type current, injecting a current in
phase with the negative half-wave of voltage.
CAUTION
If message “Measuring…” appears on the display, the instrument is
performing measurement. During this whole stage, do not disconnect the
test leads of the instrument from the mains.
6. The “x5” test is not available for 500mA and 650mA A-type RCDs
7. When the RCD trips and
separates the circuit, if the
tripping time is within the
limits reported in Tab. 5, the
instrument gives a double
acoustic signal which signals
the positive result of the test
and then displays a screen
similar to the one reported
here to the side
R C D
0°
29ms
FRQ=50.0Hz Ut=1.4V
VP-N=228V VP-Pe=228V
0° or 180° type current
Tripping time of the RCD
Detected value for contact voltage Ut
compared to the nominal value of
the set residual current
RCD OK
x1 30mA 50V
Func IdN RCD UL
8.
The results displayed can be saved by pressing the SAVE key twice or the
SAVE
key and, subsequently, the ENTER key (§ 9.1)
6.4.4.
mode
The standard defines the tripping times for RCDs at nominal current. The mode is used
to detect the tripping time at tripping current (which could also be lower than the nominal
voltage).
As an alternative:
5.
Press the GO/STOP key on the instrument or the START key on
remote probe once. The instrument will start measuring with a
“0°” type current, injecting a current in phase with the positive
half-wave of voltage.
Or:
5.
Press the GO/STOP key on the instrument twice or the START key
on the remote probe before the hyphens disappear. The instrument
will start measuring with a “180°” type current, injecting a current in
phase with the negative half-wave of voltage.