39
If possible, first disconnect all loads from the network on which you test the RCD. This prevents interference with the test
by any leakage currents due to these loads.
If you have a current clamp, you can measure the leakage current (see §3.11) at the RCD and so make allowance for it during
the test.
To make a more accurate measurement of the fault voltage, plant the auxiliary rod at a distance of more than 25 metres
from the earth electrode and connect it to the
(R
A
S
EL
) terminal of the device. The
symbol is then displayed.
Rb
R
N
R
L
L
N
30 mA
300 mA
Ra
PE
Particular case:
To test a residual current device located downstream of another residual current device having a smaller nominal current, you
must use the measuring cable terminated by 3 leads and make the connections shown opposite (upstream-downstream method).
Rb
R
N
R
L
L
N
Ra
> 25 m
PE
RCD
Rb
R
N
R
L
L
N
PE
Ra
RCD
RCD
RCD
red
green
blue
