Sonel MPI-540 - Measurements

MPI-540 ● MPI-540-PV – BRIEF USER MANUAL
11
3 Measurements
WARNING
During measurements (fault loop, RCD), do not touch conductive, accessible or
foreign parts of the tested electrical installation.
The following tests are available from the Measurements menu.
Low voltage measurements - LV:
 fault loop impedance (Z
L-N, L-L
, Z
L-PE
, Z
L-PE[RCD]
for mains secured with RCD),
 voltage drop ΔU,
 insulation resistance R
ISO
,
 checking the parameters of RCD (tripping current RCD I
A
, tripping time RCD t
A
and auto-
matic measurements),
 resistance R
X
,
 continuity of connections R
CONT
,
 phase sequence 1-2-3,
 direction of motor rotations U-V-W,
 resistance to earth R
E
,
 soil resistivity Ωm,
 illuminance Lux.
Measurements of photovoltaic devices - PV:
 continuity of of protective conductors and equipotential bonding R
CONT
,
 resistance-to-earth R
E
,
 insulation resistance R
ISO
PV ,
 open circuit voltage U
OC
,
 short circuit current I
SC
,
 currents and powers on AC and DC side of the inverter and its efficiency η, P, I,
 irradiance Irr.