User Manual
13
If no RCDs are present in the system under test, you can use the high current Line Earth (L-
PE) loop impedance test.
1. Turn the rotary switch to the
position.
2. Connect all three leads to the L, PE, and N (red, green, and blue) terminals of the tester.
Only the calibrated test lead which are in scope of supply must be used! The resistance
of the calibrated test leads is subtracted from the result automatically.
3. Press F1 to select L-PE. The
appears to indicate that hi current trip mode is
selected.
4. Repeat Steps 4 through 8 from the preceding test.
WWarning
Line Impedance
Line impedance is source impedance measured between Line conductors or Line and
Neutral. This function allows the following tests:
• Line to Neutral loop impedance.
• Line to Line impedance in 3-phase systems.
• L-PE loop measurement. This is a way of making a high current, 2-wire loop
measurement. It cannot be used on circuits protected by RCDs because it will cause
them to trip.
• Prospective Short Circuit Current (PSC). PSC is the current that can potentially flow if
the phase conductor is shorted to the neutral conductor or another phase conductor.
The tester calculates the PSC current by dividing the measured mains voltage by the
line impedance.
Figure 14. Line Impedance Display
1. Turn the rotary switch to the
position. The LCD indicates that the high current
loop mode is selected by displaying the symbol.
2. Connect the red lead to the L (red) and the blue lead to the N (blue). Only the calibrated
test lead which are in scope of supply must be used! The resistance of the calibrated test
leads is subtracted from the result automatically.
3. Press F1 to select L-N.