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Measurements on Three-Phase Circuits (cont'd)
Three-Phase Four-Wire Circuits: Settings Table
Measurement: True Power, Power Factor*, Apparent Power and Reactive Power
(W, PF, KVA and KVAR)
Type of Circuit: 3ø4W
Selector Setting: 3ø4W
Instructions
"R" will flash on the display. Press DCA/W ZERO**.
Connect the leads and position the clamp as shown
to take the first measurement (W
After the measurement stabilizes, press READ NEXT.
"S" will flash on the display. Remove clamp from wire.
Press DCA/W ZERO** and connect the leads and
position the clamp as shown to take the final
measurement (W
/ PF
).
S
S
After the measurement stabilizes, press READ NEXT.
"T" will flash on the display. Remove clamp from wire.
Press DCA/W ZERO** and connect the leads and
position the clamp as shown to take the final
measurement (W
/ PF
).
T
T
After the final measurement stabilizes, press READ NEXT. The CMP-200 will calculate and
display the power factor (PF) and true power (W). Press 3ø KVAR KVA to display the
reactive power (KVAR) and apparent power (KVA).
* A positive (+) PF indicates an inductive load. A negative (–) PF indicates a capacitive load.
Power factor value is correct for balanced loads only.
** Jaw should be closed and removed from circuit whenever DCA/W ZERO is pressed.
Notes:
• The + sign on the jaw must face the power source.
• All three power measurements (W
connection and clamping of jaw if any power measurement is negative.
18
Red Lead Black Lead
Connection Connection Location
R
/ PF
).
R
R
S
T
, W
and W
) should be positive. Check test lead
R
S
T
Clamp
N
R
N
S
N
T
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