MPI-506 – USER MANUAL
3.3 Checking the correctness of PE (protective earth) connections
Connect the meters as shown in the figure, touch the contact electrode with your finger and wait about
1 second. When the voltage on the PE conductor is detected, the instrument displays the mes-
sage (error in the installation, the PE conductor is connected to the phase conductor) and generates a
continuous audio signal. This option is available for all measurement functions related to the RCD’s
and fault loop, except for Z
L-N,L-L
.
WARNING
When dangerous voltage on the protective conductor PE is detected, discon-
tinue the measurements immediately and repair the electrical installation.
Make sure that during the measurements you are not standing on an uninsulated
floor as this may cause erroneous results.
The threshold value, which triggers the signal of exceeded allowable voltage on PE
conduit, is approximately 50 V.
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