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Chapter 2 Measurement Procedure
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1
N
2
Power supply side
Load
Red
Yellow
Black
Red
Black
Yellow
Figure 2. Power and power factor Measurement
on Sin
le-Phase Three-Wire Circuit
[Single-Phase Three-Wire Circuit]
The power and power factor of a single-phase three-
wire circuit are measured similar to measurement on
a single-phase two-wire circuit. Connect the black
cord to the neutral wire as shown in Figure 2, then
switch the red cord and clamp sensor to the
respective wires. In this way, the power and power
factor between the wires can be measured.
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