MI 3152(H)
Eurotest
XC (2,5 kV)
Tests and measurements
115
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
information.
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)
Table 7.4: Relationship between Input voltage
– U
L-PE
and nominal voltage
– U
n
used for
calculation
