HT instruments MACROTEST G3 - Manual (Page 48)

MACROTESTG3 - COMBIG3
EN - 47
6.4.8. Verify of protection against indirect contacts (TT systems)
1. Select the options "TT", “25 or 50V”, “50Hz or 60Hz”
and the reference voltage in the general settings of the
instrument (see § 5.1.3).
Touch the icon. The screen to the side appears on
the display.
Touch the lower icon on the left. The following screen
appears on the display:
2. Move the left slide bar reference by selecting the
icon to execute the measurement.
Move the middle slide bar reference by selecting the
"
" option. The right slide bar reference is
automatically set in position .
Confirm the choice by going back to the initial
measurement screen.
Touch the lower icon on the right. The following screen
appears on the display:
3. Move the left slide bar reference by selecting the RCD
tripping time between the values: 10, 30, 100, 300, 500,
650, 1000mA
Move the right slide bar reference by selecting the
connection type between the options:
(presence
of neutral conductor) or (absence of neutral
conductor)
Confirm the choices by going back to the initial
measurement screen.
4. If possible, disconnect all loads connected downstream
of the measured point, as the impedance of these users
could distort the test results. Connect the shuko plug,
the alligator clips or the remote lead to the electrical
mains according to Fig. 10, Fig. 11 and Fig. 12. The
connection point of the instrument (near or far from the
protection) is usually irrelevant to the test as the
resistance of the wires is negligible compared to the
value of earth resistance.
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 § 5.1.3) as shown in
the screen to the side.