The document discusses IEC61000 standards for harmonic limits of electrical equipment. It classifies equipment into four classes (A, B, C, D) and provides the maximum permissible harmonic limits for each class. It also provides an example of using a single phase energy analyzer to test the harmonics of a 4W LED bulb and generate a harmonic report.

1. Understanding IEC61000 for Harmonics Compliance
IEC61000 applies for loads < 16A. It is a standard to : 1) Classify the Loads 2) Set max permissible
limits of harmonics for each type of classification
voltage
time
Full wave rectifier stage waveforms;
a. Input voltage b. Output voltage c. input current
SPEA-1
Single Phase Energy Analyzer
SPEA-1 lets you view and analyse the harmonics
AN-102
a
b
c
Harmonic
Analysis
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2. HARMONICS STANDARDS
OF DIFFERENT EQUIPMENTS
(according to IEC61000)
There are four classes of equipments
Class A: Balanced three phase equipments
Household appliances, excluding equipment
identified by class D
Tools excluding portable tools
Dimmers for incandescent lamps
Audio equipments
Everything else that is not classified as B, C, or D
Harmonic Table:
Harmonic order(n) Maximum Permissible
Harmonic current (A)
Odd Harmonics
3
5
7
9
11
13
15<n<39
2.30
1.1
0.77
0.40
0.33
0.21
0.15
15
n
Even Harmonics
2
4
6
8<n<40
1.08
0.43
0.30
0.23
8
n
AN-102
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3. Class B: Portable tools
Arc welding equipments which is not
professional equipments
Class C: Lighting equipments
Harmonic Table:
Harmonic order(n)
Maximum Permissible
Harmonics current Expressed
as a Percentage of the Input
Current at the Fundamental
Frequency (%)
Odd Harmonics only
2
3
5
7
9
11<n<39
2
30x *
10
7
5
3
* is the circuit power factor
AN-102
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4. Class D: Personal computer and monitors
Television receivers
Note: Equipment must have power level
75 W up to and not exceeding 600 W
Harmonic order (n)
Maximum
permissible
Harmonic Current
per Watt (mA/W)
Maximum
Permissible
Harmonic Current
(A)
3
5
7
9
11
13<n<39
3.4
1.9
1.0
0.5
0.35
3.85
2.30
1.14
0.77
0.40
0.33
see table 1
Harmonic Table:
TESTING EXAMPLE
Testing of 4W LED bulb by using SPEA-1
After simple source load connection you can show the following results:
Vrms- 222.1 volts VTHD- 4.0%
Arms- 23.37 mA ATHD- 51.2%
Watt- 3.825Watt V3rd harmonic value- 6.329Volts
AN-102
Complete harmonic table can be downloaded
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5. HARMONIC REPORT GENERATION
AN-102
Spectrum
Button
For report generation just press
button and wait for about
30 seconds to load upto 55th
harmonic. than click on graph
icon in software
HARMONIC REPORTS
The User friendly software allows you to generate reports you can use to
directly check confirmation to the IEC61000 standards
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