140
ELSPEC
G
G
4
4
K
K
F
F
i
i
x
x
e
e
d
d
P
P
o
o
w
w
e
e
r
r
Q
Q
u
u
a
a
l
l
i
i
t
t
y
y
A
A
n
n
a
a
l
l
y
y
z
z
e
e
r
r
U
U
S
S
E
E
R
R
&
&
I
I
N
N
S
S
T
T
A
A
L
L
L
L
A
A
T
T
I
I
O
O
N
N
G
G
U
U
I
I
D
D
E
E
PQZIP Recording - Principle
The G4 K BLA CKBOX is a ble to c ontinuously r ecord & s tore a ll t he el ectrical
waveforms, all the time, in the case of G44430 for more than a year, with no gaps
in the data. The flow diagram & subsequent definitions outline the PQZIP process:
The i nnovation behind t his c apability is t he P QZIP compression t echnology. The
patented PQZIP enables you to store up to a thousand times more information than
typical f ormats, allowing f or s torage o f complete & precise d ata o ver extended
periods of t ime. The f low d iagram & s ubsequent d efinitions o utline t he P QZIP
process:
FLOW DIAGRAM
DEFINITIONS
Recording & Measurement: The w aveforms ar e b eing s ampled at 1 024
samples p er cy cle r esolution f or v oltages an d 2 56 s amples p er cycle
resolution for currents.
ADC: Voltages an d c urrents ar e b eing c onverted & s caled t o a chieve a
maximum r esolution u sing t he f ollowing A nalog t o D igital C onversion
process.
Data Buffer: The digital waveform data is buffered resulting in 512 spectral
components (harmonics) per cycle for voltages and 128 for currents.
Compression Algorithm: Every harmonic component is being an alyzed and
compressed in dividually. Z ero v alue co mponents ar e s kipped. N o-zero
harmonic components are evaluated over time & only changes in a value or
angle ar e p rocessed. Resulting i n s torage of co mplete & p recise data o ver
extended periods of time.
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