5.6 Loop Impedance Measurement without
RCD Tripping
This measurement us used for loop measurement
within current circuits equipped with RCDs without
causing the RCD to trip during the measurement.
To obtain precise measurement results, switch
off all loads or disconnect them from the mains.
Connect the 'Schuko-Plug – Measurement Plug'
measurement adapter to the Telaris 0100 plus,
by inserting the measurement plug labelled with
L, N, PE into the respective sockets: L (33), N
(34), and PE (35).
Plug the Schuko-plug into the socket under test.
Select measurement range („ZL, IPSC/RCD") by
means of the measurement range selection
switch (32).
Select contact voltage threshold by means of
the key „VC" (24).
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 to exchange the L
and N connectors at the instrument.
If the symbol for socket error (6) is displayed
on the screen, we are dealing with a socket wi-
ring error. If a voltage exceeding the pre-selec-
ted contact voltage limit is present between N
and PE, 'UB>UL' (4) is displayed on the screen.
To perform a complete socket test, touch the
contact electrode PE (25) and observe the di-
splayed values on the screen. A valid result may
only be achieved when touching the contact
electrode PE (25)!
You are dealing with a PE error, if the error sig-
nal is audible and the 'Attention' symbol (1),
and 'Socket Error' (6) are displayed. I.e., either
the PE is not connected or a high voltage
(phase) is present at PE.
The measurement may only be started if the
socket is not faulty and the measurement adap-
ter has been connected by respecting correct
polarity.
Press the "Start" key (26) to start the measure-
ment. During the measurement ' - ' is displayed
on the screen.
20
Loop Impedance Measurement without RCD Tripping
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