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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
22-21Power Measurement
Hence, the overall reactive power is
Q Q Q P P= + = +
[ ]
12 32 1 30 3 10
3
( ) ( )
(2
2
.60
)
22.2.3.8
T
hr
ee-Wattmeter Insertion
A three-wire, three-phase system can be measured by three wattmeters connected as in Figure 22.24.
e articial neutral point position does not aect the measurement; it is usually imposed by the imped-
ance
o
f
t
he
v
oltmeter
l
eads
o
f
t
he
w
attmeters
.
22
.2.3.9
Me
dium-Voltage,
Thr
ee-Wattmeter Insertion
Analogously
to th
e
sin
gle-phase
ca
se,
fo
r
me
dium-voltage
ci
rcuits,
th
e
th
ree-wattmeter
in
sertion
is
modied as in Figure 22.25.
22
.2.3.10
Me
thod Selection Guide
For
th
ree-wire
sy
stems,
th
e
o
w
ch
art
of Fi
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Publisher Resources

ISBN: 9781439848913