METREL MultiServicerXD MI 3325, Инструкция по эксплуатации

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MI 3325 MultiServicerXD Appendix B
186
is replaced with
Option Description
Z factor Impedance correction scaling factor [1, 0.80], Default value: 0.80
The value should be set according to local regulative.
Default value of
RCD Standard parameter is changed to BS 7671.
Modifications in chapters:
6.2.16 Z loop
– Fault loop impedance and prospective fault current
6.2.17 Z loop m

– High precision fault loop impedance and prospective fault current
6.2.18 Zs rcd
– Fault loop impedance and prospective fault current in system with RCD
6.2.19 Z line
– Line impedance and prospective short-circuit current
6.2.20 Z line m

– High precision line impedance and prospective short-circuit current
6.2.21 Z auto - Auto test sequence for fast line and loop testing
6.2.22 Voltage Drop
Test parameters
Fuse Type
Selection of fuse type [gG, NV, B, C, D, K, Off, Custom]
Isc factor Correction factor Isc
[0.2 … 3.0]
Test limits
Ia(Ipsc) Minimum fault current for selected fuse
are replaced with
Test parameters
Fuse Type Selection of fuse type [Off, BS 88-2, BS 88-3, BS 3036, BS 1362, B, C,
D, Custom]
Z factor Z factor [0.8, 1]
Test limits
Zlim(Z)
Zlim(Z (LPE), Z (LN))
Maximum loop / line impedance for selected fuse or custom value.
Figure B.2: Examples of Z line, Z loop and Z auto measurement result
Prospective fault / short circuit current I
PSC
is calculated from measured impedance as follows:
Z
U
I
N
PSC

Loop / line impedance limit Z
Lim(Z)
for selected fuse is calculated from the following formula: