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MI 3152(H) EurotestXC (2,5 kV)
Connection diagram
Measurement procedure
Enter the AUTO TT function.
Set test parameters / limits.
Measure the impedance Zref at origin (optional), see chapter 7.14 Voltage Drop.
Connect test cable to the instrument.
Connect test leads or Plug commander to the object under test, see Figure 7.85.
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
Figure 7.85: AUTO TT measurement
150
Tests and measurements
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