Dranetz hdpq xplorer User Manual

F-5
APPENDIX F/ PQ Parameter Calculations
Calculations
(continued)
Description Abbreviation
Wiring Configuration
Formula
Units Precision
Phase of
fundamental
averaged over
200ms.
Derived from DFT
sine expansion
output.
Ideg-a
Ideg-b
Ideg-c
Ideg-d
Any
where n=1 for 1
st
har-
monic.
Averaged over 10/12
cycles
Degree +/- 1°
Phase of
fundamental on
individual cycle.
Derived from DFT
output based on
sync channel.
Icycdeg-a
Icycdeg-b
Icycdeg-c
Icycdeg-d
Any
where g= phase
where n=1 for 1
st
harmonic
Degree +/- 1°
Amps RMS of
fundamental
Derived from DFT
Ifnd-a
Ifnd-b
Ifnd-c
Ifnd-d
Any
I
pk
is calculated from
the 1
st
harmonic of
DFT
Volts +/- 0.2% of
Reading
9 KHz BW
NEMA Current
Unbalance
Max deviation of
the 3 phases from
the average of the
3.
Iunbal-a
Iunbal-b
Iunbal-c
Any % +/- 1 %
Symmetrical Components
Zero Sequence Iseqzro Delta or Wye only None +/- 1 %
Positive Sequence Iseqpos
Negative Sequence Iseqneg
Negative
Unbalance
Iunbalneg
or
Zero Unbalance Iunbalzro
or
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Dranetz hdpq xplorer Specifications

General

Brand	Dranetz
Model	hdpq xplorer
Category	Measuring Instruments
Language	English