Carlo Gavazzi WM3-96 - Manual (Page 61)

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62
Technical features
57
General specifications
64
56 64
Additional errors
DIGITAL FILTER:
• Operating range: 0 to 99.9% of the input scale
• Filtering coefficient: 1 to 255
• Filter action: alarms, serial and analogue outputs (fundamental
variables: V, A, W and their derived ones).
EVENT LOGGING: only with the module RS232+RTC mod-
ule. The max./min. values of the selected variables and the
alarm status are stored with reference to date (dd:mm:yy) and
time (hh:mm:ss). Max. capacity: 480 events.
VARIABLE PAGES: 4 variables per page; up to 27 pages, one
of which is completely programmable.
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Harmonic Distortion Analysis
ANALYSIS PRINCIPLE: FFT
HARMONIC MEASUREMENT:
• Current: up to the 50
th harmonic
• Voltage: up to the 50 th harmonic
TYPE OF HARMONICS:
• THD (VL1); THD odd (VL1); THD even (VL1); the same for
the other phases: L2 and L3.
• THD (AL1); THD odd (AL1); THD even (AL1); the same for
the other phases: L2 and L3.
HARMONIC PHASE ANGLE:
• The instrument measures the angle between the single
harmonics of “V” and the single harmonics of “A” expressed
as “
°
”, making it possible to understand if the harmonics are
generated or imported.
On three-wire systems, the angle cannot be
measured.