MI 3102(H) BT
Eurotest
XE
Measurements
46
5.5.3 Trip-out current (RCD I)
A continuously rising residual current is intended for testing the threshold sensitivity for RCD
trip-out. The instrument increases the test current in small steps through appropriate range as
follows:
RCD type
Slope range
Waveform
Notes
Start value
End value
AC
0.2
I
N
1.1
I
N
Sine
All models
A, F (I
N
30 mA)
0.2
I
N
1.5
I
N
Pulsed
A, F (I
N
= 10 mA)
0.2
I
N
2.2
I
N
EV, MI
(a.c. part)
0.2
I
N
1.1
I
N
Sine
Model MI 3102BT
only
B, B+, EV, MI
(d.c. part)
0.2
I
N
2.2
I
N
DC
Maximum test current is I
(trip-
out current) or end value in case the RCD didn’t trip-out.
Trip-out current measurement procedure
Select the
RCD
function using the function selector keys.
Set sub-function to
RCD I
using
UP / DOWN
keys.
Set test
parameters
(if necessary).
Connect
test cable to the instrument.
Connect
test leads to the item to be tested (see
Press the
TEST
key to perform the measurement.
Store
the result by pressing the
MEM
key (optional).
Figure 5.23: Trip-out current measurement result example
Displayed results:
I
............ trip-out current
Uci
....... contact voltage at trip-out current I or end va
lue in case the RCD didn’t trip
t
............ trip-out time
