5.7.3 RCD Test with Rising Residual Current
(Ramp Method), Trip Current
(I , ta/VC
For this test, the trip current I of the RCD is meas-
ured. The contact voltage VC is measured during the
preliminary test at a current of 1/3 I∆N. The RCD
test is resumed after the successful preliminary test
at a residual current, rising in steps of 10 % from
40 % I∆N until maximum 140 % I∆N. The present-
ly active residual current is indicated on the display
and in the event of the RCD tripping the trip time of
the RCD is measured. The contact voltage VC is
evaluated for the trip current I.
To obtain a precise measurement result, we ad-
vise to switch off all loads or to disconnect
them from the mains.
Connect the 'Schuko-Plug – Measurement Plug'
measurement adapter to the Telaris 0100 plus,
by inserting the measurement plugs labelled L,
N, PE into the respective sockets: L (33), N (34),
and PE (35).
Connect mains plug or test lead to UUT, re-
specting correct polarity.
Select the trip time measurement (IR, tA/UB
[RCD]) using the "Measurement Function" rota-
ry dial (32).
Select the nominal current of the installed RCD
using the 'I∆N ' (22) and ' I∆N ' (23) keys.
The following nominal trip currents are availa-
ble:10mA, 30mA, 100mA, 300mA, and 500mA.
Select the contact voltage limit by pressing the
'VL' (24) key.
The socket is continuously checked for faults.
If the "turn plug by 180°” symbol (7) is di-
splayed on the screen, you are advised to eit-
her turn the Schuko-plug or the exchange the
L and N connectors at the instrument.
If the socket symbol (6) is displayed, a mains
error is present. If the voltage present between
N and PE exceeds the preselected contact vol-
tage limit (50V/25V), „UB>UL" (4) is displayed.
To perform a complete socket test, touch the
contact electrode PE (23) and observe the di-
splayed values on the screen. If the symbol "
socket error" (6) occurs, a PE error is present.
27
RCD Test with Rising Residual Current (Ramp Method), Trip Current (I , ta/VC
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