16
Measurements on Three-Phase Circuits
(cont’d)
Three-Phase Three-Wire Circuits: Settings Table for Power Measurements
* 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.
• COM connection (black lead) should remain connected to the same phase during both
measurements.
• Both power measurements may be positive, or one may be negative. Make sure all
connections are correct to obtain proper measurements.
Measurement:
True Power, Power Factor*, Apparent Power and Reactive Power
(W, PF, KVA and KVAR)
Type of Circuit:
3ø3W
Selector Setting: 3ø3W
Instructions
Red Lead
Black Lead
Clamp
Connection Connection Location
“R” will flash on the display. Press
DCA/W ZERO
**.
Connect the leads and position the clamp as shown
R
S
R
to take the first measurement (W
RS
/ KVAR
RS
).
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
T
S
T
position the clamp as shown to take the final
measurement (W
TS
/ KVAR
TS
).
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).
