MI 3325 MultiServicerXD
117
𝐼
𝑀𝑎𝑥3𝑝
=
𝐶
𝑚𝑎𝑥
× 𝑈
𝑁(𝐿−𝐿)
√3
2
𝑍
(𝐿−𝐿)
where
𝑍
(𝐿−𝐿)
= √𝑅
(𝐿−𝐿)
2
+ 𝑋
(𝐿−𝐿)
2
𝐶
𝑚𝑎𝑥
= {
1.05; 𝑈
𝑁(𝐿−𝐿)
= 400 𝑉 ± 10 %
1.10; 𝑜𝑡ℎ𝑒𝑟𝑤𝑖𝑠𝑒
Refer to
A 1143
– Euro Z 290 A adapter Instruction manual
for detailed information.
Test parameters
Fuse Type
Selection of fuse type [gG, NV, B, C, D, K, Off, Custom]
Fuse I
Rated current of selected fuse
Fuse t
Maximum breaking time of selected fuse
Test
1)
Test [Off, L/N, L/L, L1/N, L2/N, L3/N, L1/L2, L1/L3, L2/L3]
1)
The measuring results (for phase
– neutral or phase – phase line) are set according to
the setting. The parameter is meant for documentation.
Refer to
Fuse tables guide
for detailed information on fuse data.
Test limits
Ia(Ipsc)
Minimum short circuit current for selected fuse
Connection diagram
Figure 6.78: Phase-neutral or phase-phase high precision Line impedance measurement
– Connection of A 1143
Measurement procedure
Select A 1143 adapter in Settings menu.
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 cable.
Connect test leads to the object under test, see
Start the measurement using
or
button.
Save results (optional).
