Carlo Gavazzi WM4-96 - Manual (Page 10)

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10
Displaying of the variables
Display of Gas Water meters
5
WM4-96 philosophy
8
12
16
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Pages from "19" to "24" (from 10 to 11 in single
phase mode) Displaying of the harmonic analysis
When the instrument is supplied, these pages are
not enabled, see page 44 to enable them. The
key is active: access to the detailed analysis of the
harmonics. After pressing the key, a pointer appears
along the horizontal axis (see figures below). To display the
data relating to the single harmonics move along the his-
togram using the (moves from left to right) and
(moves from right to left) keys. For each harmonic the instru-
ment measures the % value with reference to the funda-
mental and the single harmonic angle between the “V” har-
monic and the “A” harmonic of the same order.
▼ ▲
F
F
Line phase being measured
and relevant voltage or cur-
rent value (L1-L2-L3).
Total harmonic distortion and
relevant value in percentage
Phase angle between the voltage and current harmonic
of the same order: a phase angle between 0° and 90° and
between 270° and 360° corresponds to a generated har-
monic; an angle between 90° and 180° and between 180°
and 270° corresponds to an imported harmonic.
Harmonic order (h1 to h50),
relevant conventional sign
(- or +) and value of the har-
monic given in percentage.
The pointer
shows which
harmonic is
being meas-
ured
SIMPLE ANALYSIS:
Harmonic order (h1 to h50),
of the phase being measured
(L1-L2-L3) and relevant
absolute current or voltage
value of the harmonic.
DETAILED ANALYSIS:
F
F