Megger LCB2000/2 Guide De L'utilisateur page 44

Appendix 2 - Storing Distribution Circuit Impedances - 2
Multiple Distribution
Board Systems
Distribution
Zd for
Board
DB1 = Ze
1
Store Zd for DB1 Here
(=Ze in this case)
Live Submain
Distribution
Zd for
Board
DB2
2
Earth
This measurement can be
stored as both a loop
impedance for the
submain supplied by DB1
and also the distribution
circuit impedance for DB2
Zd
FINAL CIRCUIT
Live
CPC
Measure Zs for final circuit
here. Press
to step through results.
L-PE Ω (Zs)
PFC L-E
L-N Ω
PFC L-N
R1 + R2*
*Where R1 + R2 = Zs - Zd
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