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φ
1
3W Power Measurement
1φ3W power measurements are similar to 3φ3W unbalanced power measurements except that the
nomenclature is different. Two measurements of W
1. First, measure W
Fig.12.
a. Apply power to the meter with
the jaw clear of any conductors
b. Set the rotary switch to the 3φ
position.
c. Press the 3φ button once, and
the 3φ3W symbol will singularly
appear on the left side of the LCD.
The
W
RS
prompting the user to measure
W
RS(L1G).
d. If the watt reading is not zero,
press the DCA/DCW ZERO button
once to zero it.
e. Insert the test leads into the input terminals.
f. Connect the COM (black) terminal to ground.
g. Connect the V (red) terminal to the second phase (L1).
h. Clamp on to the same phase as connected in step g. (L1).
i. The power clamp will automatically select the proper range.
j. Wait until the reading stabilizes, then press the NEXT button. The W
disappear and the W
prompting the user to take W
measurements.
2. Secondly, measure W
a. Disconnect the test leads from the
phase where the jaws were clamped
onto in the previous measurement.
b. Connect the test lead to the L2 line.
d. If the watt reading is not zero, press
the DCA/DCW ZERO button once to
zero reading
e. Clamp on to the L2 line where the
test lead is connected.
f. The power clamp will automatically
select the proper range.
g. Wait until the reading is stable, then
press the NEXT button. The W
W
) symbol will disappear. At this
L2G
moment, W
TS
memory,
3. Once the NEXT button is pressed after measurements of W
the power clamp will add the two values together and show the result on the LCD. The W
will display along with the wattage of the 1φ3W unbalanced Power. PF is not shown in 1φ3W
unbalanced power mode. See equation below.
W
1φW
(or W
). See
RS
L1G
symbol
will
flash
reading will be stored in memory. The W
RS(L1G)
(W
TS
(or W
). Fig. 13.
TS
L2G
(or
T
(or W
) is stored in the
L2G
= W
= W
RST
RS(L1G)
(or W
) and W
RS
L1G
1 Phase 3 Wire
L1
G
L2
)
1 Phase 3 Wire
L2G
L1
G
L2
Current >
(or W
RS
+ W
TS(L2G)
www.burntec.com
(or W
) are required
TS
L2G
W
L1
Current >
1 Phase
Load
1 Phase
Load
FIGURE 12
(W
RS
L1G
(W
) symbol will flash
T
L2G
W
L2
1 Phase
Load
1 Phase
Load
FIGURE 13
) and W
(or W
L1G
TS
L2G
) symbol will
) are taken,
symbol
RST
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