Dranetz hdpq, Техническое описание

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Calculations
(continued)
Description Abbreviation Wiring Configuration Formula Units Precision
VA Arithmetic
Fundamental Total VAfa-tot Wye and Neutral based
measurements VA 0.2 % of
Reading
+/- 0.05%
of FS
True Power Factor TPF-a Wye, uses measured
values
Not meaningful for
Delta None 1% of
Reading
TPF-b
TPF-c
TPF-d
Displacement
Power Factor DPF-a Wye, uses measured
values
Not meaningful for
Delta
DFT derived funda-
mental of Volts and
Amps
None 1% of
Reading
DPF-b
DPF-c
DPF-d
Phase of Volts to
Amps of
fundamental on
individual cycle
Derived from DFT
VIdeg-a Not meaningful for
Delta Degree +/- 1°
VIdeg-b
VIdeg-c
VIdeg-d
where g= phase
where n=1 for 1
st
harmonic
TPF worst case of
A,B,C TPFworst Not meaningful for
Delta
Max of
1- |TPF
a
|, 1- |TPF
b
|,
1- |TPF
c
|
None +/- 1%
Total Vector
Power Factor TPFv-tot All None +/- 1%
Total Arithmetic
Power Factor TPFa-tot All None +/- 1%
DPF average DPFavg All None +/- 1%
DPF worst case of
A,B,C DPFworst All DPF of channel with
largest deviation from
1.0 None +/- 1%
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