HT instruments SIRIUS87 User Manual

Page 39

SIRIUS

EN - 37

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 Fig. 12,

Fig. 13, Fig. 14). When using untied cables connect the crocodiles to the free ends of the
cables.

Fig. 12: Connection for P-PE impedance

measurement Single/Two phase 230V

Fig. 13: Connection for P-PE impedance

measurement Three-phase 400V + N

Fig. 14: Connection for P-PE impedance measurement Three-phase 230/400V without N

3. Connect the shuko plug into a 230V 50Hz socket or the crocodiles to the conductors of

the three-phase system (see Fig. 12, Fig. 13, Fig. 14).

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

t. At

this stage if you turn the selector on LOOP Z

under mode P-PE, the instrument will

refer to the limit of 25V during the test.