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3–25
CapTalk – 3
Monitor/Harmonics Analysis
The input signal is sampled at 64 samples per
cycle, giving an overall sampling rate of 3840
samples per second for a 60 Hz system. This
provides the ability to reproduce signals of up to
1920 Hz. Therefore, up to the 31st harmonic can be
calculated using Discrete Fourier Transform with a
fundamental frequency of 60 Hz. The fundamental
for both the Voltage and Current channels
is calculated every sample, meaning, every
260.41 µs. These voltage and current magnitudes
are used in a real-time decision making algorithm
and real-time metering.
Total Harmonic Distortion (THD) for both voltage
and current are calculated and displayed using the
following equation:
Figure 3‑32 Harmonic Analysis Dialog Screen
In addition to Harmonics and THD calculations
the secondary task also triggers the Sequence of
Events (SOE) recorder whenever any Harmonic
selected by the user exceeds a preset threshold
level.
The user is able to select which Harmonic(s) will
trigger the SOE function and also set the threshold
level, above which the SOE recorder will be initiated.
The threshold level is set as a percentage of the
magnitude of the fundamental.
Summary of Contents for M-6280A
Page 1: ...Instruction Book M 6280A Digital Capacitor Bank Control ...
Page 33: ...This Page Left Intentionally Blank ...
Page 53: ...xx M 6280A Instruction Book This Page Left Intentionally Blank ...
Page 56: ...Introduction 1 1 3 Figure 1 1 Functional Diagram ...
Page 59: ...1 6 M 6280A Instruction Book This Page Left Intentionally Blank ...
Page 66: ...2 7 Operation 2 Figure 2 1 M 6280A Front Panel ...
Page 137: ...3 14 M 6280A Instruction Book Figure 3 13 CapTalk Main Screen Connected Mode ...
Page 172: ...3 49 CapTalk 3 Figure 3 67 CBEMA Settings Dialog Screen ...
Page 179: ...3 56 M 6280A Instruction Book Figure 3 87 M 6280A DNP Configurator Dialog Screen ...
Page 184: ...3 61 CapTalk 3 Figure 3 98 CapPlot Window with Data Logging Data Example ...
Page 185: ...3 62 M 6280A Instruction Book Figure 3 99 CapPlot Window with Oscillograph Data Example ...
Page 191: ...3 68 M 6280A Instruction Book This Page Left Intentionally Blank ...
Page 313: ...M 6280A Instruction Book 4 122 Figure 4 63 Setpoints Dialog Screen VAr Control ...
Page 314: ...Configuration 4 4 123 Figure 4 64 Setpoints Dialog Screen Current Control ...
Page 451: ...D 4 M 6280 Instruction Book This Page Left Intentionally Blank ...