Hioki CM3286-50, Инструкция по эксплуатации

Страница: 102 / 118

96
Equations
(5) Unbalanced 3‑phase/4‑wire power measurement
Unbalanced 3‑phase/4‑wire
active power
P
(UB3P4W)
[W]
P1 + P2 + P3
• The symbol
P1
represents the active power
of the phase voltage U
1
and the wire current
I
1
.
• The symbol P2 represents the active power
of the phase voltage
U
2
and the wire current
I
2
.
• The symbol
P3
represents the active power
of the phase voltage U
3
and the wire current
I
3
.
• The active power P has no sign during
consumption and a negative sign during
generation.
Unbalanced 3‑phase/4‑wire
apparent power
S
(UB3P4W)
[VA]
S1
+
S2
+
S3
• The symbol S1 represents the apparent
power of the phase voltage
U
1
and the wire
current I
1
.
• The symbol
S2
represents the apparent
power of the phase voltage U
2
and the wire
current
I
2
.
• The symbol S3 represents the apparent
power of the phase voltage
U
3
and the wire
current I
3
.
• Due to the effects of measurement error ,
S
=|
P
| is used when
S
<|
P
|.
HIOKI CM3286C961-00