HT instruments MACROTEST 5035 - Manual (Page 34)

MACROTEST 5035
EN - 33
4.4.4. Mode "P-PE"
1. Select
P-PE mode by means of the FUNC key.
2. Connect the 3 black, blue and green connectors of the three-terminal shuko cable or of the
single cables in the corresponding input terminals of the instrument
B1, B3, B4 (see
possible connections in the following pictures). When using untied cables connect the
crocodiles to the free ends of the cables.
B2 B3 B4 B1
P
Connection for loop impedance measurement in
a 230V single- or two-phase system
B2 B3 B4 B1
L1
L2
L3
N
Connection for loop impedance measurement in
a 400V three-phase system with neutral
B2 B3 B4 B1
L1
L2
L3
Measurement of loop impedance in a 230 or 400V three-phase system without neutral
3. Connect the shuko plug into a 230V 50Hz socket or the crocodiles to the conductors of
the three-phase system (see previous pictures).
4. The instrument carries out the test verifying that the contact voltage of the installation
masses relating to the current actually supplied by the instrument is not higher than the
limit contact voltage value. The limit contact voltage which reference is made to is that
set under one of the following functions: RCD
, RCD or R
a15mA
.
Example: if you are effecting some tests in a medical room, the limit contact voltage is
equal to 25V. The operator will switch on one of the following functions: RCD
,
RCD or Ra
15mA
, and select the limit contact voltage of 25V by means of U
L
t. At
this stage if you turn the selector on LOOP Z
S
/I
K
under mode P-PE, the instrument will
refer to the limit of 25V during the test.