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Power Quality Analyzer Model 8335
APPENDIX B
GLOSSARY OF TERMS
Ampere:
unit of electrical current intensity (A symbol).
Bandwidth:
frequency range on which an instrument supplies a precise
measurement.
Channel and phase:
a measurement channel corresponds to a difference in
potential between two conductors. A phase is a single conductor. In polyphased
systems, a measurement channel may be between two phases, or between a
phase and neutral, or between a phase and earth, or between neutral and earth.
Cut:
reduction in voltage at a point in the electrical power network below the cut
threshold.
Dip threshold:
specific voltage value to detect the start and end of a voltage dip.
Distortion factor (DF - Distortion Factor):
ratio of the harmonics of a signal to
the whole signal without the DC or bias component (THD-R).
Harmonics level
whole number equal to the relationship between the frequency
of the harmonic and the fundamental frequency.
Imbalance in voltage in a polyphased electrical power network:
status where
efficient values for voltages between conductors (fundamental component) and/or
differences in phase between successive conductors are not equal.
Factor K:
number based on the contents of a harmonic of a charge current that
determines the maximum load on a source of energy. The K factor calculated by the
PowerPad
®
is measured and compared with the one specified by the transformer
manufacturer. It gives the percentage of “harmonics load” of the transformer.
Flicker:
The visual effect produced by the variation in electrical voltage.
Frequency:
number of full voltage cycles produced in one second.
Fundamental component:
component whose frequency is the fundamental
frequency.
Harmonics:
voltage and current existing in electrical material at frequencies that
are multiples of the fundamental frequency.
Hysteresis:
difference in amplitude between threshold incoming and outgoing
values.
K factor:
used to quantify the effect of a load on a transformer.
Shop for AEMC products online at:
1.877.766.5412
www.
PowerMeterStore
.ca
