MI 3155
Eurotest
XD
Test and measurements
171
7.31
AUTO TT – Auto test sequence for TT earthing
system
Tests / measurements implemented in AUTO TT sequence
Voltage
Z line
Voltage Drop
Zs rcd
RCD Uc
Figure 7.106: AUTO TT menu
Measurement parameters / limits
I
ΔN
Rated RCD residual current sensitivity
[10 mA, 15 mA, 30 mA, 100 mA,
300 mA, 500 mA, 1000 mA]
RCD type
RCD type
[AC, A, F, B, B+]
Selectivity
Characteristic
[G, S]
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)
Isc factor
Isc factor
[0.20 … 3.00]
I test
Test current
[Standard, Low]
Limit(
ΔU)
Maximum voltage drop
[3.0 % ... 9.0 %]
Limit Uc
Conventional touch voltage limit
[12 V, 25 V, 50 V]
Ia(Ipsc (LN))
Minimum short circuit current for selected fuse or custom value
1)
Applicable if Fuse type is set to Off or Custom.
Refer to
Fuse tables guide
for detailed information on fuse data.
