Power Quality Logger
Using the 1745 Power Quality Logger
31
Voltage Dips and Swells
If the voltage passes the upper limit (V
N
+ 10 %) or lower limit (V
N
- 10 %),
the event is registered as a voltage swell or dip respectively (thresholds are
adjustable in PQ Log).
The duration, time and extreme value of the dip or swell is also recorded. See
Figure 13.
Time
90% Vn
Duration
Depth
Height
Duration
100% Vn
110% Vn
egb019.eps
Figure 13. Voltage Dips and Swells
Voltage Harmonics
Voltage harmonics are defined as voltage components that have a frequency
that is an integer multiple of the fundamental frequency. Logging function A
records each individual voltage harmonic, up to the 50
th
. These values are
averaged over the interval length defined in PQ Log.
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1.877.766.5412
www.
MyFlukeStore
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Summary of Contents for 1745-BASIC
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