Gx
Series
EN - 59
Verify of protection against indirect contacts (IT systems)
6.4.11.
1. Select the options "IT", “25 or 50V”, “50Hz or 60Hz” and
the reference voltage in the general settings of the
instrument (see § 5.1.4).
Touch the
icon. The screen to the side appears on
the display.
Touch the lower icon. The following screen appears on
the display:
2. Move the left slide bar reference by selecting the
icon to execute the measurement.
Move the central slide bar reference by selecting the
"
L-PE
" option. The right slide bar reference is
automatically set in position
.
Confirm the choice by going back to the initial
measurement screen.
3. If possible, disconnect all loads connected downstream
of the measured point, as the impedance of these users
could distort the test results. Perform the preliminary
calibration of the test leads as described in § 6.4.2
Connect the alligator clips or the remote lead to the
electrical mains according to Fig. 23. Note the presence
of the correct voltage values between L-L and L-PE
corresponding to the selections carried out in the initial
phase (see § 5.1.4) and a possible N-PE voltage due to
the IT system as shown in the screen to the side.
4. Press the
GO/STOP
key
for few seconds
or the
START
key on the remote lead. During this whole
stage, do not disconnect the measuring leads of the
instrument from the system under test.
In case of positive result (contact voltage at the point
<50V or <25V), the screen to the side is displayed by
the instrument, which contains the value of the first fault
current measured, expressed in
mA
(see § 13.9).
With
Isc < 30mA the Ut value is not mdisplayed
Press the
SAVE
button or touch the
icon to save
the measurement (see § 7.1).
5. In case of negative result (contact voltage at the point
>50V or >25V), the screen to the side is displayed by
the instrument.
Note the presence of the measurement result of the
contact voltage highlighted in red.
Press the
SAVE
button or touch the
icon to save
the measurement (see § 7.1).
