MI 3155
Eurotest
XD
Test and measurements
117
2)
Parameter is available only when RCD I test is selected and parameter Use is set to
‘other’.
Connection diagrams
Figure 7.33: Connecting the Plug commander and the 3-wire test lead
Figure 7.34: Connection for Uc(P) measurement
7.9.1
RCD Uc
– Contact voltage
Measuring current up to
1
3
of nominal residual current is used for measurement of contact
voltage.
Contact voltage measurement is performed before trip-out time/current tests. If limit voltage
(e.g. 50 V) is reached during this pre-test, trip-out test is aborted for safety reason.
7.9.1.1
RCD Uc(P)
– Contact voltage with external probe
Contact voltage measurement can also be performed using external test probe. Place external
probe to reference earth potential.
For connection see
Figure 7.34 Connection for Uc(P) measurement
Before the contact voltage measurement make sure that Uc(P) parameter is set to On.
