MI 3325 MultiServicerXD
12
1.2
Testing potential on TP1-PE terminal for installation tests
In certain instances faults on the installation's PE wire or any other accessible metal bonding
parts can become exposed to live voltage. This is a very dangerous situation since the parts
connected to the earthing system are considered to be free of potential. The instrument checks
the voltage between mains PE and PE terminal of TP1 connector.
Figure 1.1: Reversed L and PE conductors (application of 3-wire test lead)
Warnings!
Reversed line and PE conductors is the most dangerous situation!
If dangerous voltage is detected on TP1-PE terminal, stop all measurements
immediately and ensure the cause of the fault is eliminated before proceeding
with any activity!
Test procedure
Connect test cable to the instrument.
Connect test leads to the object under test.
Test is automatically done after entering appropriate test function
1)
If hazardous live voltage is detected between mains PE and PE terminal of TP1 connector and
three-phase rotary field is not detected, instrument displays warning icon
, display is yellow
coloured, instrument buzzer is activated and further measurements are disabled: RCD tests,
Rpe,
Z loop, Zs rcd, Z auto, Voltage drop ΔU and Auto Sequences
®
.
Notes:
1)
The test on TP1-PE terminal is active in the Voltage, Rpe, RCD tests, Z loop, Zs rcd, Z
auto, Z line, ΔU and Auto Sequences only!
Make sure that the power supply socket for MI 3325 is properly grounded. PE test could
otherwise be impaired and results of a single test or Auto Sequence
®
can mislead.
1.3
Standards applied
The MultiServicerXD instrument is manufactured and tested according to the following
regulations, listed below.
