MI 3321 MultiservicerXA
Machine testing operating mode
126
Loop impedance menu
Test parameters for fault loop impedance measurement
TEST
Type of test based on installed protective device: [Zloop, Zs(rcd)*,
Rs(rcd)*, Z m
L-Pe*** ]
Fuse type
Selection of
Fuse
type
[*F, NV, gG, B, C, K, D] **
For Z LOOP, Zs(rcd), Z m
L-Pe
Fuse I
Rated current
of selected fuse
Fuse T.
Maximum
breaking time
of selected fuse
Isc_lim
Minimum short circuit
current
for selected fuse combination.
For Rs(rcd)
RCD/Fi
Selection of
RCD nominal current
size
[10 mA, 30 mA, 100 mA, 300
mA, 500 mA, 1000 mA]
R Lim
Limit
resistance value for selected RCD nominal current.
See Appendix C for reference fuse data.
* Zs(rcd) and Rs(rcd) tests will NOT trip-out the RCD in RCD protected machine/
installation.
** »*F« means no fuse selected.
*** See
chapter 9.2.5.1
for Z m
L-Pe, high precision loop impedance measurement.
Test circuit for fault loop impedance measurement
