Amprobe ACD-51HP Power-Quality-Clamp-Ons - Manual (Page 24)

ACD-51HP - ACD-56HPQ
4.3.9. Power measurements on three phase balanced systems
WARNING
The maximum input for Voltage measurements is 600V. Do not attempt to
take any voltage measurement exceeding the limits indicated in this manual.
Exceeding the limits could cause electrical shock at the operator and
damages to the clamp meter.
L1
L2
L3
Fig. 13: power and energy measurement on three phase balanced systems
1. Select the “
W3 Φ
” position.
2. Open the jaws and clamp the L3 phase cable. Pay attention to the alignment marks
(see paragraph 4.1.2. and Fig. 13).
3. Insert the red plug into V/ Ω jack and the black plug into COM one.
4. Connect the red test lead to L1 phase conductor and the black test lead to L2 phase
conductor (see Fig. 13). The measured active power value and the symbol “AC” are
displayed.
5. If the symbol " " is displayed the input voltage and/or current value is higher than the
instrument’s full scale. Therefore the power and power factor values could be incorrect.
6. By pressing the FUNC key the following parameters are displayed:
• Active power (kW);
• Reactive power (kVA R , capacitive C, inductive I);
• Apparent power (kVA);
• Power factor (Pfi or Pfc for inductive and capacitive respectively).
7. If the reading were difficult, press D-H key to hold the obtained value. To escape this
function press the D-H key again.
8. If the measurement was performed in dark environments, press at least for 1 second
the key to activate the backlight that is automatically turned OFF after 5 seconds.
By pressing and holding the MAX/MIN/PK key for at least 1 second, the instrument
activates the maximum (MAX), minimum (MIN) and average (AVG) measurements. All
these values are continually updated even if only one of them is displayed. With a simple
MAX/MIN/PK key press the values are cyclically displayed. To escape this function press
and hold the MAX/MIN/PK key at least for 1 second or turn the selector to any position.
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