User Guide

To Measure AC+DC Apparent and Reactive Power
(kVA/kVAR) in a single phase 2-wire system
• Set the rotary switch to A/V.
• Press the DC A/W ZERO button to zero the reading.
• Set the rotary switch to kVA/kVAR.
• Insert the black test lead into the COM terminal and the red
test lead into the + terminal.
• Connect the black test probe to the neutral conductor and
the red test probe to the hot conductor.
• Using the trigger to open the jaws, fully enclose the hot
conductor within the clamp.
• Release the trigger and be sure that the jaws have closed
completely.
• Apparent Power (kVA) is a calculated value based on the
formula
kVA =
• Reactive Power (kVAR) is a calculated value based on the
formula
kVAR =
• To obtain a more accurate kVAR value when the power fac-
tor (PF) is greater than 0.91, use the 3
φ
3W function.
• The kVA value is shown on the main display and the kVAR
value is shown on the upper display.
• Positive kVAR (+) indicates a capacitive load, while negative
kVAR (-) indicates an inductive load.
To measure AC+DC Apparent and Reactive Power
(kVA/kVAR) in a single phase 3-wire system
See section on 1
φ
3W AC+DC Power Measurements
3
φ
3W AC+DC Power Measurements
Kilowatt Range Resolution Accuracy Voltage/Current
(AC+DC True Power) Range
0-99.99kW 0.01kW ±(2.0% +0.05) 600VAC, 800VDC
100-999.9kW 0.1kW 2000A AC/DC
1000-1200kW 1kW ±(2.0% +5)
Power Factor 0.2-1.0 for 1
φ
2W, 1
φ
3W, 3
φ
3W, and 3
φ
4W
KVAR Range Resolution Accuracy Voltage/Current
(AC+DC Reactive Power) Range
0-99.99kW 0.01kW ±(2.0% +0.05) 600VAC, 800VDC
100-999.9kW 0.1kW 2000A AC/DC
1000-1200kW 1kW ±(2.0% +5)
In a three phase 3-wire system, the 61-802 power clamp measures
the true power (kW), power factor (PF), apparent power (kVA), and
reactive power (kVAR) of the system. These values are calculated
based on the formulas
kW
3
φ
3W
= kW
RS(L1L2)
+ kW
TS (L3L2)
PF
3
φ
3W
=
kVA
3
φ
3W
=
kVAR
3
φ
3W
=kVA
RS(L1L2)
+ kVA
RTS(L1L2)
To Measure AC+DC Power Measurements in a three
phase 3-wire system
• Set rotary switch to 3
φ
3W without jaws clamping onto any
wire.
• The LCD display will show a flashing R to indicate that the
meter is ready for the first measurement.
• If the watt reading is not zero, press the DC A/W ZERO button
once to zero out the watt reading.
• Insert the black test lead into the COM terminal and the red test
lead into the + terminal.
12
VA
1000
(kVA)
2
- (kW)
2
Note: The “+” sign on the jaw must face the power source for
correct measurement.
11
kW 3
φ
3W
kVA 3
φ
3W
kW
2
3
φ
3W
- kVAR
2
3
φ
3W