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Typical Measurements (cont'd)
Three-Phase Four-Wire Measurements:
True Power, Power Factor and Apparent Power Measurement
The selector is set for Power Factor in the illustrations.
Use the correct setting for the desired measurement.
3ø4W
R (L1)
S (L2)
A
T (L3)
N
Notes:
• The + sign on the jaw must face the power source.
• A positive (+) PF indicates an inductive load. A negative (–) PF indicates a capacitive load.
Power factor value is correct for balanced loads only.
• All three power measurements (W
connection and clamping of jaw if any power measurement is negative.
Three-Phase Four-Wire Balanced Loads
W
= W
+ W
3Ø4W
R
S
KVA
=
3 (KVA
3Ø4W
R
KVAR
=
[KVA
3Ø4W
3Ø4W
PF
= KW
3Ø4W
3Ø4W
KVA
3Ø4W
18
W
T (L3)
Load
, W
and W
) should be positive. Check test lead
R
S
T
+ W
T
)
2
2
]
– [KW
]
3Ø4W
3ø
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