Power Quality Analyzer PowerPad
®
IV Model 8345
27
For
FK Coefficient : q
, choose a value between 1.5 and 1.7 to use for the
K factor calculation. The exponential constant q depends on the type of
winding and the frequency
A value of 1.7 is suitable for transformers where the conductor cross
sections are round or square.
A value of 1.5 is suitable for transformers where the low-voltage windings
are in foil form.
For
FK Coefficient : e
, choose a value between 0.05 and 0.10 for the
K factor calculation
The e value represents the ratio of Eddy current losses at the fundamental
frequency to resistive losses at the reference temperature.
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The default values for the FK coefficients (q = 1.7 and e = 0.10) are suitable
for most applications
3.4.1.4 Harmonic Mode
Select
to configure the parameters of harmonic mode
For
Harmonics rate reference
, select either fundamental (%f) or RMS (%r)
For
MSV1
, input a value for the first flagging frequency
For
MSV2
, input a value for the second flagging frequency
3.4.1.5 MSV Template
Select
to configure the curve of maximum MSV voltages as a function
of the frequency
There are 5 modifiable preset points to define the curve.
