Megger LCB2000/2 Guide De L'utilisateur page 43

Appendix 1 - Storing Distribution Circuit Impedances - 1
TN-S
Single Distribution
Board Systems
42
Service Cable L
Ze
Store Distribution Circuit
Impedance Zd here.
Note: In this case Zd = Ze
the external earth fault loop
impedance
Live
Distribution
Board
Consumer
EARTH/CPC
Unit
Measure Zs at end of final
*Where R1 + R2 = Zs - Zd
FINAL CIRCUIT
R1
R2
circuit. Press
repeatedly to display
L-PE Ω (Zs)
PFC L-E
L-N Ω
PFC L-N
R1 + R2*