Chauvin Arnoux C.A 6115N, Руководство пользователя

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5.7.2 Performing a measurement
In this function, connection to the neutral is not necessary for “R
A
” measurement but is for "R
A
".
For “R
A
”, you can connect the “neutral” and “earth” test leads to the PE earth.
1. Connect the instrument as shown on the diagram above.
NOTE:
In the case where the earth conductor is connected to the earth by several connections in parallel (on
a TN system for example, where this enables the potential of the PEN conductor to be kept at 0 all
along it whilst neutral currents flow), use the “R
A
SEL
” measurement function with a current clamp
(available as an option), to measure each earth selectively without disconnecting them.
WARNING: In such cases, connect the clamp and the PE test lead (white) as close as possible
to the required earth to be measured and compensate for the leads before starting
the measurement!
L1
L2
L3
N
PE
R
A > 20 m S
TT system
L1
L2
L3
N
Z
PE
> 20 m S
R
A
IT system
L1
L2
L3
N
PE
> 20 m S
TN system
PEN