total harmonic distortion power meter by embuilt technologies
DESCRIPTION
THDPM-1 is THD analyzer which measures upto 51st harmonic.It provides Voltage and Current THD.It shows the net effect on THD due to load. It also shows following parameters- Voltage Current Watt Frequency Power Factor It is useful for testing of LED Drivers, SMPS, CFL, CHOKES etc.TRANSCRIPT
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THDPM-1
By-EMBUILT TECHNOLOGIES
www.embuilt.comwww.energylogger.blogspot.com
(THD MEASUREMENT WITH EXAMPLES AND FIGURES)
Date-01/09/2014
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THDPM-1
Auxiliary Supply : 180 – 240 VoltsInput Voltage : 0 – 240 VoltsCurrent : 0 – 2.0 A*(200mA,500mA range are also available)
Measures upto 51st HarmonicAccuracy Class : 1%Voltage HarmonicsCurrent Harmonics
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INTRODUCTION
THDPM-1 is THD analyzer which measures upto 51st harmonic.
It provides Voltage and Current THD. It shows the net effect on THD due to load. It also shows following parameters-
VoltageCurrentWattFrequencyPower Factor
It is useful for testing of LED Drivers, SMPS, CFL, CHOKES etc.
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MAIN PAGE
VOLTAGE
CURRENTWATT
PF
VOLTAGE THD
CURRENT THD
NET THD
(Frequency and PF shows alternately )
Press to see Voltage Harmonics
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VOLTAGE THD PAGE
3rdHarmonicVoltage
5th Harmonic
7th Harmonic
Voltage rms Value
1st Harmonic
THD %
Press to see more Harmonics (Upto 51st harmonic can be seen)
Press to see Current Harmonics
Press to see Previous Harmonic
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CURRENT THD PAGE
3rd Harmonic
Current
5th Harmonic7th Harmonic
Current rms Value
1st Harmonic
Current THD %
Press
to see more Harmonics
Press to see Previous Harmonic
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TEST BENCH SETUP
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THD ANALYSIS
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Experiment 1
Lets start testing with only bulb load.
We take a 100 Watt bulb load and connect it to load side.
Voltage THD is 2.90% and Current THD is 4.85%.
So bulb cause a small Distortion in current.
WITH BULB LOAD
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EXPERIMENT 1 PART AVOLTAGE THD
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EXPERIMENT 1 PART BCURRENT THD
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WITH CFL LOAD
Experiment with only CFL load.
We take a normal 14 Watt CFL and connect it to load side.
Voltage THD is 3.56% and Current THD is 26.99%.
A CFL distorts the current more.
Experiment 2
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EXPERIMENT 2 PART AVOLTAGE THD
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EXPERIMENT 2 PART BCURRENT THD
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WITH BULB AND CFL LOAD
Experiment with BULB and CFL load.
BULB specification is 100 Watt . CFL specification is 14W. Voltage THD is 3.23% and Current THD is
5.99% . BULB has more power than CFL and also
linear in nature so it tends to decrease the current distortion.
Experiment 3
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EXPERIMENT 3 PART AVOLTAGE THD
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EXPERIMENT 3 PART BCURRENT THD
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WITH BULB AND CAPACITOR LOAD
Experiment with BULB and CAPACITOR.
We take a capacitor of 3.15µF and connect to load side with a normal BULB load.
Voltage THD is 3.12% and Current THD is 15.34%.
A capacitor also distorts the current.
Experiment 4
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EXPERIMENT 4 PART AVOLTAGE THD
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EXPERIMENT 4 PART BCURRENT THD
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WITH LAPTOP LOAD
Experiment with Laptop load.
We take a laptop and connect it to supply with charger of 65watt.
Voltage THD is 7.92% and Current THD is 113.1%.
AC to DC Converters provides high distortion in current.
Experiment 5
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EXPERIMENT 5 PART AVOLTAGE THD
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EXPERIMENT 5 PART BCURRENT THD
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WITH BULB AND LAPTOP LOAD
Experiment with Laptop and Bulb load.
We Connect Bulb and Laptop at load side. Voltage THD is 8.83% and Current THD is
69.59% . A linear load reduces the current distortion. BULB has more power than Laptop Charger and also
linear in nature so it tends to decrease the current distortion.
Experiment 6
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EXPERIMENT 6 PART AVOLTAGE THD
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EXPERIMENT 6 PART BCURRENT THD
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WITH LED DRIVER LOAD
Experiment with LED and LED Driver Load.
We Connect LEDs at load side through LED Driver.
Voltage THD is 1.68% and Current THD is 133.9% .
LED Driver produces high distortion in current.
Experiment 7
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EXPERIMENT 7 PART AVOLTAGE THD
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EXPERIMENT 7 PART BCURRENT THD
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WITH LED BULB LOAD
Experiment with LED BULB.
We Connect LED at at load side. Voltage THD is 2.55% and Current THD is
63.40% . LED Driver produces distortion in current.
Experiment 8
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EXPERIMENT 8 PART AVOLTAGE THD
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EXPERIMENT 8 PART BCURRENT THD