MI 3152(H)
Eurotest
XC (2,5 kV)
Tests and measurements
150
Connection diagram
Figure 7.85: AUTO TT measurement
Measurement procedure
Enter the
AUTO TT
function.
Set test parameters / limits.
Measure the impedance Zref at origin (optional), see chapter
Connect test cable to the instrument.
Connect test leads or Plug commander to the object under test, see
Start the Auto test.
Save results (optional).
Figure 7.86: Examples of AUTO TT measurement results
Measurement results / sub-results
Uln
Voltage between phase and neutral conductors
ΔU
Voltage drop
Z (LN)
Line impedance
Z (LPE)
Loop impedance
Uc
Contact voltage
Zref
Reference Line impedance
Ipsc (LN)
Prospective short-circuit current
Ipsc (LPE)
Prospective fault current