METREL EurotestXC MI 3152, Instruction Manual

Page: 124 / 203

MI 3152(H) Eurotest XC (2,5 kV) Tests and measurements
123
Measurement procedure

Enter the Z line m

function.

Set test parameters / limits.

Connect test leads to A 1143
– Euro Z 290 A adapter and switch it on.

Connect A 1143
– Euro Z 290 A adapter to the instrument using RS232-PS/2 cable.

Connect test leads to the object under test, see Figure 7.46 .

Start the measurement using or button.

Save results (optional).
Figure 7.47: Examples of high precision Line impedance measurement result
Measurement results / sub-results
Z
Line impedance
Ipsc Standard prospective short-circuit current
Imax Maximal prospective short-circuit current
Imin Minimal prospective short-circuit current
Imax2p Maximal two-phases prospective short-circuit current
Imin2p Minimal two-phases prospective short-circuit current
Imax3p Maximal three-phases prospective short-circuit current
Imin3p Minimal three-phases prospective short-circuit current
R
Resistance of line impedance
XL Reactance of line impedance
Uln Voltage L-N or L-L
Freq Frequency
Standard prospective short-circuit current I
PSC
is calculated as follows:
𝐼
𝑃𝑆𝐶
=
230 𝑉
𝑍
where
𝑈
𝐿−𝑁
= 230 𝑉 ± 10 %
𝐼
𝑃𝑆𝐶
=
400 𝑉
𝑍
where
𝑈
𝐿−𝐿
= 400 𝑉 ± 10 %