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MI 3325 MultiServicerXD
118
Figure 6.79: Examples of high precision Line impedance measurement result
6.2.21 Z auto - Auto test sequence for fast line and loop testing
Warning!
MI 3325 checks voltage on TP1-PE terminal before running test and disables test
in case the hazardous live voltage is detected. In this case, immediately remove
supply from tested circuit, find, and eliminate problem before any other activity!
See chapter
1.2 Testing potential on TP1-PE terminal for installation tests
information.
Tests / measurements implemented in Z auto test sequence are:
Voltage
Voltage Drop
Z line
Zs rcd
Uc
Figure 6.80: Z auto test menu
Test results / sub-results
Uln
Voltage between phase and neutral conductors
∆
U
Voltage drop
Z (LN)
Line impedance
Z (LPE)
Loop impedance
Zref
Reference line impedance
Ipsc (LN)
Prospective short-circuit current
Ipsc (LPE)
Prospective fault current
Uc
Contact voltage
Test parameters
Protection
Protection type [TN, TNrcd, TTrcd]