Three Phase Wattmeter
Three-Phase Wattmeter
Total power in a 3f circuit
is the sum of the powers of the separate phases. The total power could be measured by placing a wattmeter in each phase (Figure
12); however, this method is not feasible since it is often impossible to break into the
phases of a delta load. It also may not be feasible for the Y load, since the neutral point to which
the wattmeters must be connected is not always accessible. Normally, only two wattmeters are used in making 3f
power measurements.
Here are specifications which describe a three phase power
meter. SOURCE
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PA4400A
3 phase 3 channel Power Analyzer (optional 4th channel)
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Click
here for detailed PA4400A spec sheet and features
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PA4400A measurement inputs
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 | DC and 0.02Hz to 500kHz
Bandwidth
| 1440Vpk, 125Apk direct
measurements (DC coupled) all fully isolated and independently
ranged
| 0.1% basic measurement
accuracy
| Accurate even with
waveform distortion and low power factor
| Up to 4 isolated input
channels (each channel has voltage, current and external shunt)
| Flexible wiring
configurations 3Ø4w+Torque, 3Ø4w+1Ø, 3Ø3w+3Ø3w etc. |
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Measurements
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| Measures W, V, A, VA, VAr.,
Power Factor, Frequency, Peak Value, RMS Value, Mean Value, Crest
Factor and 3-phase totals for V, A, W, VA, VArs and Power Factor
| Inrush / surge current
measurement
| Data capture for short
term events
| Measures efficiency, watts
loss
| Total Harmonic Distortion
and harmonic analysis to the 80th
| Measures fundamental
components and harmonic phase angle
| Integrator function with
Whrs, Ahrs and elapsed time
| Torque/Speed input
(option) |
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Power
Analyzer System
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| Large clear multiple
parameter display- up to 56 measurements displayed simultaneously
| Waveforms - view volts,
current and power waveforms for each channel
| Scaling for external
shunts, current clamps, and voltage dividers
| Up to 10 readings per
second
| PWM Filter for motor
drives
| IEEE-488 and RS232
interfaces
| 10 setup memories for
storing complete front panel set ups
| 10 Chart recorder outputs
(option)
| Printout graphics or lists |
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