
MI 3155
Eurotest
XD
Test and measurements
175
7.33
AUTO TN – Auto test sequence for TN earthing
system without RCD
Tests / measurements implemented in AUTO TN sequence
Voltage
Z line
Voltage Drop
Z loop
Rpe
Figure 7.112: AUTO TN menu
Measurement parameters / limits
Fuse type
Selection of fuse type
[Off, gG, NV, B, C, D, K, Custom]
Fuse I
Rated current of selected fuse
Fuse t
Maximum breaking time of selected fuse
I (
U)
1)
Rated current for
U measurement (custom value)
Limit(
∆
U)
Maximum voltage drop
[3.0 % ... 9.0 %]
Limit(Rpe)
Max. resistance
[Off, 0.1
... 20.0
]
Ia(Ipsc (LN), Ipsc (LPE)) Minimum short circuit current for selected fuse or custom
value
Isc factor
Isc factor
[0.20 … 3.00]
1)
Applicable if Fuse type is set to Off or Custom.
Refer to
Fuse tables guide
for detailed information on fuse data.
Connection diagram
Figure 7.113: AUTO TN measurement