MI 3101 EurotestAT: Appendix G
ES1 – application of regulative UNE-202008
132
G.3.4 Line impedance and prospective short-circuit current
Line impedance is measured in loop comprising of mains voltage source and line wiring (L
and N). It is covered by requirements of the EN 61557-3 standard.
See
4.2 Single test
for keys functionality.
Figure G.11: Line impedance
Test parameters for line impedance measurement
FUSE I
Rated current
of fuse [---, 6 A, 10 A, 16 A, 20 A, 25 A].*
Z_lim Maximum
line impedance
for selected fuse.
*--- Means no fuse selected
Circuit for measurement of line impedance
L1
L2
L3
N
PE
R
E
Ro
L
PE
N
L/L
1
N/L2
PE/L3
N/
L
2
L
/L
1
PE
/L
3
Figure G.12: Phase-neutral or phase-phase line resistance measurement – connection of
plug commander and universal test cable
Line impedance measurement procedure
Select the
Z-LINE
function.
Select test
parameters
(optional).
Connect
test cable to the instrument.
Connect
test leads to the tested object (see
figure G.12
).
Press the
TEST
key.
After the measurement is finished,
store
the result (optional).
