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f.
Select one phase (S or L2, for example) as COM and connect the COM (black) terminal to that
phase (S or L2).
g. Connect V (red) terminal to the second phase (R or L1).
h. Clamp on to the same phase as in step g. (R or L1).
The power clamp will automatically select the proper range.
i.
Wait until the reading stabilizes, then press the NEXT button. The W
disappear. At this moment, W
flashing to prompt the user to take the W
2. Secondly, measure W
a. Disconnect the test leads and jaws from the lines in the previous measurement.
b. Connect the test leads to the third phase (T or L3).
c. Open and close the jaws, be sure that no conductor is in the jaws.
d. If the watt reading is not zero, press the DCA/DCW ZERO button once to zero the reading.
e. Clamp on to the third phase where the test lead is connected (T or L3)
f.
The power clamp will automatically select proper range.
g. Wait until the reading stabilizes, then press the NEXT button. The W
disappear. At this moment, W
Once the NEXT button is pressed (after measurements of W
clamp will add the two values and display the result on the LCD. The W
that the reading shown is the wattage of the 3φ3W unbalanced Power. PF is not shown in the 3φ3W
unbalanced power mode.
3 Phase 3 Wire
R(L1)
S(L2)
T(L3)
NOTE: Once a phase is selected as the COMMON connection, users cannot change this
selection in the subsequent measurements. For example, if S (or L2) phase is selected, S (or L2)
phase is always connected to the COM of the power clamp during measurements of W
W
) and W
L1L2
TS
NOTE: The "+" sign printed on the jaw must face the power source.
NOTE: In the 3φ3W unbalanced power measurement mode, W
value. Users must make sure all the connections are correct to obtain correct power readings.
is stored in memory, and the W
RS
(or W
). Refer to Fig. 8.
TS
L3L2
(or W
TS
W
= W
= W
3φW
RST
W
RS (L1L2)
Current >
3 Phase
Load
FIGURE 7
(or W
) in 3φ 3W unbalanced power mode.
L3L2
(W
) measurement.
TS
L3L2
) data are stored in memory,
L3L2
(or W
RS
+ W
RS(L1L2)
TS(L3L2)
3 Phase 3 Wire
R(L1)
S(L2)
Current >
T(L3)
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(W
) symbol will
RS
L1L2
(W
) symbol appears
T
L3L2
(or W
) symbol will
T
L3L2
) and W
(or W
L1L2
TS
L3L2
symbol appears indicating
RST
W
TS (L3L2)
or W
could be a negative
RS
TS
)), the power
3 Phase
Load
FIGURE 8
(or
RS
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