Megger PQ2000, Руководство пользователя

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Overview of MPQ2000
MPQ2000-UG-EN Rev 8 October 2018
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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.
GPS Time A time synchronization procedure applied periodically during a
recording using a GPS receiver.
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
A measurement of environmental protections that states the
ingress of dust is not entirely prevented, but it will not enter in
sufficient quantity to interfere with the satisfactory operation of the
equipment and dripping water (vertically falling drops) 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.