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 classication

voltage

time

Full wave rectier stage waveforms;

a. Input voltage b. Output voltage c. input current

SPEA-1Single Phase Energy Analyzer

SPEA-1 lets you view and analyse the harmonics

AN-102

a

b

c

Harmonic

Analysis

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HARMONICS STANDARDSOF DIFFERENT EQUIPMENTS

(according to IEC61000)

There are four classes of equipments

Class A: Balanced three phase equipments

Household appliances, excluding equipment

identied by class D

Tools excluding portable tools

Dimmers for incandescent lamps

Audio equipments

Everything else that is not classied as B, C, or D

Harmonic Table:

Harmonic order(n) Maximum Permissible

Harmonic current (A)

Odd Harmonics

3

5

7

9

11

13

15

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

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

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 conrmation to the IEC61000 standards

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