METREL EurotestXC MI 3152 Instruction Manual page 121

MI 3152(H) EurotestXC (2,5 kV)
Measurement procedure

Enter the Z line function.

Set test parameters / limits.

Connect test cable to the instrument.

Connect test leads or Plug commander to the object under
test, see Figure 7.43.

Start the measurement.

Save results (optional).
Figure 7.44: Examples of Line impedance measurement result
Measurement results / sub-results
Z Line impedance
Ipsc Prospective short-circuit current
Voltage measured between L/L1 – N/L2 test terminals
Uln
R Resistance of line impedance
XL Reactance of line impedance
Imax3p Maximal three-phases prospective short-circuit current
Imin3p
Minimal three-phases prospective short-circuit current
Imax2p Maximal two-phases prospective short-circuit current
Imin2p Minimal two-phases prospective short-circuit current
Imax Maximal single-phase prospective short-circuit current
Imin Minimal single-phase prospective short-circuit current
Prospective short circuit current I
where:
U ......... Nominal U
n
L-N
k ........ Correction factor (Isc factor) for I
sc
information.
Table 7.5: Relationship between Input voltage – U
is calculated as follows:
PSC
I
PSC
or U voltage (see table below),
L-L
PSC
U Input voltage range (L-N or L-L)
n
110 V (93 V  U
230 V (185 V  U
400 V (321 V  U
calculation

U k

N SC
Z
. Refer to chapter 4.6.5 Settings for more
 134 V)
L-N
 266 V)
L-N
 485 V)
L-L
and nominal voltage – U
L-N(L)
120
Tests and measurements
used for
n