Sonel MPI-530-IT - Measurement of Fault Loop Parameters in the L-N and L-L Circuits

OPERATING MANUAL MPI-530-IT version 1.06
20
Measurements of fault loop impedance performed downstream of inverters are
ineffective and their results are unreliable. This is due to the instability of internal
impedance in inverter circuits during its operation. The measurements of fault
loop impedance should not be performed directly downstream of inverters.
3.4.1 Measurement of fault loop parameters in the L-N and L-L circuits
Settings
Set the rotary switch of function selection at
Z
L-N,L-L
/U
L-N,L-L
position.
Press F1 push-button if L
lead length needs to be selected.
Use and to select the lead
length and press ENTER.
In order to set the security param-
eters press F2 .
Use , and , to set the
security parameters and press
ENTER.