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Power Quality Logger
Methods of Logging
Current Harmonics
Current harmonics are defined as current components that have a frequency that is an integer multiple of the fundamental frequency of the line power current. Logging function A records each individual harmonic of the phase currents and the neutral current, up to the 50th order, and presents the harmonics as absolute values. The values are averaged over the interval length defined in PQ Log.
Mains SignalingVoltage components that have frequencies that are not integer multiples of the fundamental frequency of the line power voltage are called Mains Signaling voltages or
The Logger can be programmed to record up to five interharmonics, with a resolution of 5 Hz. This function can also be used to monitor
The Logger measures the
Additionally, the Logger provides a
•200 ms maximum value (recommended for estimating
•200 ms minimum value
•3 seconds maximum value
•Average value over interval
In PQ Log, the frequency can be entered with a resolution of 0.5 Hz, but for evaluation the values are corrected to a bandwidth of 5 Hz. One frequency can be defined for each band: for example, for a
See the PQ Log manual for details.
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