Hioki PW8001-01 User Manual

215
Specications of Equations
Wiring
Item
1P2W 1P3W 3P3W2M 3V3A 3P3W3M 3P4W
Power factor
When equation Type 1 is selected
λ
(i)
= si
(i)
P
S
i
i
()
()
λ
(i)(i+1)
= si
(i)(i+1)
P
S
ii
ii
()
+
()
()
+
()
1
1
λ
(i)(i+1)(i+2)
= si
(i)(i+1)(i+2)
P
S
(i)(i+1)(i+2)
(i)(i+1)(i+2)
When equation Type 2 is selected
λ
(i)
=
P
S
i
i
()
()
λ
(i)(i+1)
=
P
S
ii
ii
()
+
()
()
+
()
1
1
λ
(i)(i+1)(i+2)
=
P
S
(i)(i+1)(i+2)
(i)(i+1)(i+2)
When equation Type 3 is selected
λ
(i)
=
P
S
i
i
()
()
λ
(i)(i+1)
=
P
S
ii
ii
()
+
()
()
+
()
1
1
λ
(i)(i+1)(i+2)
=
P
S
(i)(i+1)(i+2)
(i)(i+1)(i+2)
• If equation Type 1 is selected, the polarity sign
si
for power factor
λ
indicates the lead/lag polarity;
no sign indicates lag, whereas negative sign (−) indicates lead.
• The polarity sign
si
(i)
is acquired based on the lead/lag between voltage waveform
U
(i)s
and current
waveform
I
(i)s
for each measurement channel
(i)
.
The signs of
si
12
,
si
34
, and
si
123
are acquired from those of the
Q
12
,
Q
34
, and
Q
123
, respectively.
• If equation Type 3 is selected, the sign of active power
P
is used without being reversed for a
polarity sign.
Power phase
angle
When equation Type 1 is selected
φ
(i)
= si
(i)
cos
−1
|λ
(i)
|
φ
(i)(i+1)
= si
(i)(i+1)
cos
−1
|λ
(i)(i+1)
|
φ
(i)(i+1)(i+2)
= si
(i)(i+1)(i+2)
cos
−1
|λ
(i)(i+1)(i+2)
|
When equation Type 2 is selected
φ
(i)
= cos
−1
|λ
(i)
|
φ
(i)(i+1)
= cos
−1
|λ
(i)(i+1)
|
φ
(i)(i+1)(i+2)
= cos
−1
|λ
(i)(i+1)(i+2)
|
When equation Type 3 is selected
φ
(i)
= cos
−1
λ
(i)
φ
(i)(i+1)
= cos
−1
λ
(i)(i+1)
φ
(i)(i+1)(i+2)
= cos
−1
λ
(i)(i+1)(i+2)
• If equation Type 1 is selected, polarity sign
si
indicates the lead/lag polarity; no sign indicates lag,
whereas negative sign (−) indicates lead.
• The polarity sign
si
(i)
is acquired based on the lead/lag between voltage waveform
U
(i)s
and current
waveform
I
(i)s
for each measurement channel
(i)
.
The signs of
si
12
,
si
34
, and
si
123
are acquired from those of the
Q
12
,
Q
34
, and
Q
123
, respectively.
• In equation Type 1 and Type 2, the expression
cos
−1
|λ|
is used when the inequality
P ≥ 0
is true; the
expression
|180 − cos
−1
|λ||
is used instead when
P < 0
.
(i)
: Measurement channel,
M
: number samples between sync timings,
s
: sample point number
The 3P4W equations are used for Y-
Δ
conversion in 3V3A and 3P3W3M wiring modes.
The 3P4W equations are also used as-is for Y-
Δ
conversion in 3P4W wiring mode.
Specications
HIOKI PW8001A961-00

Hioki PW8001-01 Specifications

General

Brand	Hioki
Model	PW8001-01
Category	Measuring Instruments
Language	English