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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.
PowerMeterStore
K factor: used to quantify the effect of a load on a transformer.
1.877.766.5412
www.
.ca
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126
Power Quality Analyzer Model 8335
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