MI 3152(H)
Eurotest
XC (2,5 kV)
Tests and measurements
96
Measurement procedure
Enter the
Zs rcd
function.
Set test parameters / limits.
Connect test cable to the instrument.
Connect test leads or Plug commander to the object under
test, see
Figure 7.32
.
Start the measurement.
Save results (optional).
Figure 7.33: Examples of Zs rcd measurement result
Measurement results / sub-results
Z
Loop impedance
Ipsc
Prospective fault current
Ulpe
Voltage L-PE
R
Resistance of loop impedance
XL
Reactance of loop impedance
Prospective fault current I
PSC
is calculated from measured impedance as follows:
Z
k
U
I
SC
N
PSC
where:
U
n
.......... Nominal U
L-PE
voltage (see table below),
k
sc
......... Correction factor (Isc factor) for I
PSC
(see chapter
4.6.4 Settings
).
U
n
Input voltage range (L-PE)
110 V (93 V
U
L-PE
134 V)
230 V (185 V
U
L-PE
266 V)
