Auto Tt - Auto Test For Tt Earthing System - METREL EurotestXC MI 3152 Instruction Manual

MI 3152(H) EurotestXC (2,5 kV)
AUTO TT – Auto test for TT earthing system
7.25
Tests / measurements implemented in AUTO TT
Voltage
Z line
Voltage Drop
Zs rcd
RCD Uc
Measurement parameters / limits
I ΔN
Rated RCD residual current sensitivity [10 mA, 30 mA, 100 mA, 300 mA,
500 mA, 1000 mA]
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
Rated current for U measurement (custom value)
1)
I (U)
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.
* Model MI 3152 only.
Refer to Fuse tables guide for detailed information on fuse data.
Figure 7.84: AUTO TT menu
149
Tests and measurements