Chauvin Arnoux C.A 6116, Руководство пользователя

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89
tHD-R level of harmonic distortion referred to the RMS value of the signal.
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.
U
C
contact voltage between conducting parts when they are touched simultaneously by a person or an animal (IEC-
61557).
U
f
fault voltage appearing during a fault condition between accessible conducting parts (and/or external conducting
parts) and the reference frame ground (IEC-61557).
U
fk
fault voltage, in the event of a short-circuit, according to Swiss standard SEV 3569.
U
Fk
= Ik x Z
A
= U
REF
x Z
A
/Z
S
.
U
H-E
voltage measured between terminals H and E.
U
l
conventional maximum contact voltage (IEC-61557).
U
l-n
voltage measured between the L and N terminals.
U
l-PE
voltage measured between the L and PE terminals.
U
n
nominal test voltage in insulation measurement, generated between the M
W
and COM terminals.
U
n-PE
voltage measured between the N and PE terminals.
U
PE
voltage between the PE conductor and the local earth measured when the user presses the TEST key.
U
REf
reference voltage for calculation of the short-circuit current.
U
s-E
voltage measured between the S and E terminals.
Z
A
earth impedance in earth measurement on live circuit.
Z
s
impedance in the loop between the phase and the protective conductor.
Z
i
impedance in the loop between the phase and the neutral or between two phases (line loop impedance).
Z
l-n
impedance in the L-N loop.
Z
l-PE
impedance in the L-PE loop.