Overview of MPQ1000
MPQ1000-UG-EN Rev 6 April 2020
7
Definitions
Class A
A class of unit performance that complies with IEC standard 61000-4-30.
Clock Hour
Orientation
A setup feature in the PQ software that when selected will delay the start of
the recording until the real time clock in the PQ Device reaches a time interval
that is a multiple of the selected storage interval. This will keep each interval
from having fractional time stamps.
CT Full Scale
The specified maximum RMS current range of the current clamp in use with
the PQ Analyzer
Data File
An electronic file that contains the aggregated measurements of the PQ
Analyzer.
Default
Frequency
The user selectable frequency in the setup file that the PQ Analyzer defaults
to if the phase lock loop is lost.
EFT
Extremely Fast Transient - Transients that have rise and fall times in the
nanosecond region.
Flicker
An impression of unsteadiness of the visual sensation, induced by a light
stimulus with a luminance fluctuates over time.
Remote Time
Sync
When operated remotely the time can be automatically synced to the network
time at user selected intervals.
Harmonics
A sinusoidal component of a periodic wave or quantity having a frequency
that is an integral multiple of the fundamental frequency.
Hysteresis
A user selectable value that sets a buffer between the trigger level that starts
a sag or swell event and the trigger level that ends the event. This value is
displayed as a percentage of the user programmed limit.
Imbalance
The ratio of the negative sequence component of a voltage or current to the
positive sequence component of that voltage or current, typically expressed
as a percentage.
Inter-Harmonics
A harmonic component of a periodic quantity that is not an integer
multiple of the fundamental frequency that the supply system is operating.
IP54
Ingress of dust is not entirely prevented, but it must not enter in sufficient
quantity to interfere with the satisfactory operation of the equipment; complete
protection against contact. Water splashing against the enclosure from any
direction shall have no harmful effect.
Phase Angle
The delay between the zero crossing of the fundamental voltage signal and
the fundamental current signal represented in degrees.
Phase Lock Loop
A measurement control system that ensures the same number of samples are
used to analyze a given cycle regardless of the cycles period, within the
specifications of the unit.
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.
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