Electrical Installation Tester
Making Measurements
27
4. Press and release T. Wait for the test to complete.
• The primary (upper) display shows the line
impedance.
• The secondary (lower) display shows the
Prospective Short Circuit Current (PSC). PSC is
the current that would flow in case of a Line to
Neutral short. It is calculated by dividing mains
voltage by line impedance.
Use the connection shown in Figure 14 when measuring in
a 3-phase system.
L1
L2
L3
L (L1/Red)
N (L3/Blue)
apx025f.eps
Figure 14. Measuring in a 3-Phase System
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