2
Use the 8807
-51
, 8808
-51
to determine the current
- Harmonic Wave Functions -
Harmonic wave instantaneous analysis mode
T h e
8 8 0 7-
5 1
a n d
8 8 0 8 -
5 1
c a n a n a l y z e
harmonic components (up to 40 orders from the
fundamental wave) that are included in voltage
and current in a power line with a base frequency
of 45 to 65Hz. Based on the waveform that was
captured, the
8807-
51
and
8808-
51
can analyze
the RMS value, content factor, phase angle, active
power, and power phase angle for each order of
harmonics. The measurement results can be
displayed and recorded as a bar graph, numeric
data, or power vector diagram. The
8807-
51
and
8808-
51
can also display numerically the
total RMS value, the total distortion, the active/
reactive/apparent power, and power factor.
▲Captured
waveform
Captured
(waveform display screen)
▲RMS
value of harmonic wave
(bar graph)
▲Content
factor of harmonic wave (numeric data)
Time series analysis mode for continuous measurement of changes in harmonics
This mode is used to continuously measure changes in the
RMS value, content factor, phase angle, active power, and total
distortion for each order of harmonics. Measurements are made
at specific intervals and are displayed and recorded as a graph.
Through long-term monitoring of the correlation between the
timing of harmonic waves and their relationship to phenomena,
the
8807-
51
and
8808-
51
become useful tools for finding the
causes of harmonic interference and taking appropriate action.
Time series graph display screen
In time series recording mode, the
8807-
51
and
8808-
51
are
capable of recording up to 20 harmonic wave analysis items
simultaneously. The recording time can be set over a range
of 30 minutes to 150 days and the data is stored in internal
memory. If "continuous" is set as the recording time, the
8807-
51
and
8808-
51
are able to draw a continuous graph
on recording paper. Only the measurements for the last 60
divisions are stored in internal memory.
Harmonic analysis item settings
▲Time
series analysis printout example
This time series graph shows four of the analysis items that were recorded.
ASM-SENSOR [ ASM GMBH ]
