4-Wire Kw, Hp, Kva, Kvar, Power Factor & Phase Angle Measurement - Extech Instruments Extech 380976 User Manual

3Φ 4-Wire KW, HP, KVA, KVAR, Power Factor & Phase Angle Measurement
1. First, measure W
a. Set the rotary switch to the "
b. Press and hold the "RANGE" key while setting the rotary switch to the "KW/KVA" position,
the 3φ4W and W
c. Insert the test leads into the input jacks.
d. Connect the neutral line to the COM (black) terminal.
e. Connect the test probe of the V (red) terminal to the first phase (e.g. R or L1).
f. Clamp on to the same phase (e.g. R or L1).
g. The power clamp meter will automatically select the proper range.
h. Wait until the reading is stable (about 6 seconds) and then press the "HOLD" key; the W
symbol will clear and the W
measurement.
2. Second, measure W
a. Disconnect the test probe from the phase where the jaw was clamped in the previous
measurement.
b. Connect the test probe of the V (red) terminal to the second phase (e.g. S or L2).
c. Clamp on to the phase where the test probe is connected (e.g. S or L2 phase)
d. The power clamp will automatically select proper range.
e. Wait until the reading is stable (about 6 seconds) and then press the "HOLD" key; the W
symbol will disappear. The W
measurement.
(refer to the diagram below).
R(L1)
symbols should appear.
L1
symbol will appear in order to instruct users to take the W
L2
(refer to the diagram that follows the steps below)
S(L2)
symbol will appear to instruct users to take the W
L3
V " position.
10
L1
S(L2)
L2
T(L3)
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