Sonel MPI-540 - Page 40

MPI-540 – USER MANUAL
38
Select item Z
L-PE
.
The measurement screen will ap-
pear.
Live mode
U
L-PE
– current voltage between
phase and protective conductors
f – current frequency on the tested
object
Enter the measurement settings in accordance with section 3.4.1.
Press the START button to per-
form measurement.
Read out the result.
Z
L-PE
– the main result
I
k
– prospective short-circuit cur-
rent with signalling the fulfilment of
the acceptable loop criterion
(section 3.4.1, step ):
met
not met
assessment not possible
I
a
– current ensuring automatic
triggering of a selected protective
device within a required time