Megger PQ2000, Руководство пользователя

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M
MPQ2000-UG-EN Rev 8 October 2018
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Post-Triggers A user selectable value in the setup file that defines the number of
cycles the unit will record after a cycle has occurred that has
exceeded the user programmed event limits.
Power Factor The ratio of the total power input, in watts, to the total volt-ampere
input to the converter.
Pre-Triggers A user selectable value in the setup file that defines the number of
cycles the unit will record before a cycle has occurred that has
exceeded the user programmed event limits.
Rapid Voltage
Change A variation of the rms or peak value of a voltage between two
consecutive levels that is sustained for a given durations.
Ratio A user selectable value in the setup file that defines a value that
shall be used to multiply the recorded voltage and / or current
values. This feature is used when recording secondary values of a
PT or a CT and the operator wishes to record and view the
primary value.
Response
Interval A user selectable value in the setup file that allows the user to
define the aggregation length of each RMS calculation.
Programmed in cycles.
RMS Current The Root Mean Square value of the current, derived from the
summation of the square root of the arithmetic mean (average) of
the squares of the original current samples.
RMS Voltage The Root Mean Square value of the voltage, derived from the
summation of the square root of the arithmetic mean (average) of
the squares of the original voltage samples.
Sag An instantaneous or momentary decrease in the steady state
RMS value.
Sample The actual discrete instantaneous measurement the MPQ2000
performs 256 times per cycle.
Scheduled Run A recording mode in the setup file that will allow the user to select
a date and time that the MPQ2000 will start recording.
Setup File An electronic file that contains the measurement configuration that
shall be used by the PQ Analyzer during its recording.
Storage Interval A selection in the MPQ2000 setup file that allows the user to
determine how often the unit saves the aggregated data.
Sub-cycle A power quality event in which the duration is less than a cycle.
Swell An instantaneous or momentary increase in the steady state RMS
value.
TDD Total Demand Distortion is a measurement of the current THD
taking into account the average current load on the circuit during
the recording interval.
THD The ratio of the root-mean-square of the harmonic content to the
root-mean-square value of the fundamental quantity, expressed
as a percent of the fundamental.