Chauvin Arnoux C.A 6113, Руководство пользователя

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7. DEFINITIONS OF SYMBOLS
Here is a list of the symbols used in this document and on the display unit of the device.
3P 3-point earth resistance measurement with 2 auxiliary rods.
AC AC (Alternating Current) signal.
DC
DC (Direct Current) signal.
E E terminal (earth electrode, measurement current return terminal).
G
selective residual current device, specific to Austria.
H H terminal (measurement current injection terminal in 3P earth measurement).
Hz
Hertz: indicates the frequency of the signal.
I current.
I
1
current in phase 1 of a three-phase network.
I
2
current in phase 2 of a three-phase network.
I
3
current in phase 3 of a three-phase network.
I
D N
assigned operating current of the RCD to be tested.
I
a
RCD tripping current of the residual current device.
Ik
short-circuit current between the L and N, L and PE, N and PE, or L and L terminals.
IT Type of link to earth defined in standard IEC-60364-6.
I
SEL
current flowing in the earthing resistance to be measured in selective earth measurement on live circuit.
L L terminal (phase).
L
i
inductance in the L-N or L-L loop.
L
S
inductance in the L-PE loop.
N N terminal (neutral).
P active power, P = U . I . PF.
PE PE terminal (protective conductor).
PIT
Permanent Insulation Tester.
R mean resistance calculated from R+ and R-.
R+
resistance measured with a positive current flowing from terminal
W
to terminal COM.
R- resistance measured with a negative current flowing from terminal
W
to terminal COM.
R±
resistance measured alternately with a positive current, then a negative current.
R
D
resistance of the accessories subtracted from the measurement (compensation of the measurement leads).
RCD acronym designating a Residual Current Device.
R
A
earth resistance in earth measurement on live circuit.
R
ASEL
selective earth resistance in selective earth measurement on live circuit.
R
E
earth resistance connected to the E terminal.
R
H
resistance of the rod connected to the H terminal.
R
L-N
resistance in the L-N loop.
R
L-PE
resistance in the L-PE loop.
RMS
Root Mean Square: root-mean-square value of the signal, the square root of the mean of the squares of the signals.
R
N-PE
resistance in the N-PE loop.
R
N
nominal resistance in insulation measurement R
N
= U
N
/1mA.
R
PI
resistance of the auxiliary rod in earth measurement on live circuit.
R
PE
resistance of protective conductor PE.
R
S
resistance of the rod connected to the S terminal.
S terminal S (acquisition of measurement potential for the earth resistance calculation).
S
selective residual current device.
T
A
effective trip time of the residual current device.
TN
type of link to earth defined in standard IEC-60364-6.
TT type of link to earth defined in standard IEC-60364-6.
U
12
voltage between phases 1 and 2 of a three-phase network.
U
23
voltage between phases 2 and 3 of a three-phase network.
U
31
voltage between phases 3 and 1 of a three-phase network.