MI 3152(H)
Eurotest
XC (2,5 kV)
Tests and measurements
127
Measurement results / sub-results
ΔU
Voltage drop
Ipsc
Prospective short-circuit current
Un
Voltage L-N
Zref
Reference line impedance
Z
Line impedance
Voltage drop is calculated as follows:
100
)
(
%
N
N
REF
U
I
Z
Z
U
where:
ΔU
Calculated Voltage drop
Zref
Impedance at reference point (at origin)
Z
Impedance at test point
U
n
Nominal voltage
I
n
Rated current of selected fuse (Fuse I) or custom value I (
U)
U
n
Input voltage range (L-N or L-L)
110 V (93 V
U
L-N
134 V)
230 V (185 V
U
L-N
266 V)
400 V (321 V
U
L-L
485 V)
Table 7.6: Relationship between Input voltage
– U
L-N(L)
and nominal voltage
– U
n
used for
calculation
