Functional Description
38
4.2.4. Power measurement
Display
The following secondary measurements:
MIN/MAX
relative
frequency
are available in this quantity.
Choice of set-up
with type of power
and direct display
of the 4 power
parameters
Single-phase
𝑃𝑃
𝐴𝐴
=
1
𝑁𝑁 ∗ � 𝑉𝑉
(
𝑛𝑛
)
∗ 𝐼𝐼
(
𝑛𝑛
)
𝑁𝑁
Three-phase without neutral (two-wattmeter method)
Available only if your instrument has 4 channels
𝑃𝑃
𝐴𝐴
=
1
𝑁𝑁 ∗ �
(
𝑈𝑈
12
(
𝑛𝑛
)
∗ 𝐼𝐼
1
𝑛𝑛
+
𝑈𝑈
32
(
𝑛𝑛
)
∗ 𝐼𝐼
3
(
𝑛𝑛
))
𝑁𝑁
𝑃𝑃
𝑅𝑅
=
√
3
𝑁𝑁 ∗ �
(
𝑈𝑈
12
(
𝑛𝑛
)
∗ 𝐼𝐼
1
𝑛𝑛 − 𝑈𝑈
32
(
𝑛𝑛
)
∗ 𝐼𝐼
3
(
𝑛𝑛
))
𝑁𝑁
Balanced three-phase without neutral (3 wires)
Measurement of voltage V3-V1 and measurement of the current on I2
𝑃𝑃
𝐴𝐴
=
�
3
∗
(
𝑈𝑈
^
∗ 𝐼𝐼
^)
2
− 𝑃𝑃
𝑅𝑅
𝑃𝑃
𝑅𝑅
=
√
3
𝑁𝑁 ∗ �
(U
13
(
𝑛𝑛
)
∗ 𝐼𝐼
2
(
𝑛𝑛
))
𝑁𝑁
Balanced three-phase with neutral
𝑃𝑃
𝐴𝐴
=
3
𝑁𝑁 ∗ � 𝑉𝑉
(
𝑛𝑛
)
∗ 𝐼𝐼
(
𝑛𝑛
)
𝑁𝑁
Summary of Contents for OX9302-BUS
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