Chauvin Arnoux B102 Manual De Instrucciones página 19

«TNC» system
To measure the currents deriving from faults, place the clamp over the PEN Earth connection.
Power supply
earth
Figure 5: Configuration in TNC system.
«TNS» system
To measure the currents deriving from faults, separate the PE wire from the active wires.
Power supply
earth
Figure 6: Configuration in TNS system.
2.3.3. «IT» SYSTEM
To measure the fault currents, clamp the active conductors (Neutral included when distributed). Please
note that the intensity limit for the current resulting from the faults is obtained either by inserting an
impedance between a supply point (generally the Neutral supply) and Earth.
Power supply
earth
Figure 7: Configuration in IT system.
1, 2, 3 : measurement points
Masses
1, 2, 3 : measurement points
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1, 2, 3 : measurement points