Conforming to IEC 555 for Line Harmonics

Feb 04, 2009 0 Replies

I was doing some reading on:

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For Class A



Harmonic Order (n) Maximum Permissible Harmonic Current (A) Odd Harmonics



3 2.30
5 1.44
7 0.77
9 0.40
11 0.33
13 0.21
15 < n < 39 0.15 x 15/n Even Harmonics
2 1.08
4 0.43
6 0.30
8 < n < 40 0.23 x 8/n Table I. Low-frequency harmonic emissions limits for Class A equipment.

ok...



Then it says..



'The limits listed in Table I are specified for power voltages of 230 V line to neutral and 440 V line to line. Operation at different voltages must use a correction factor determined by dividing the test voltage by 230 V or 440 V. '



The power here is 120VAC, 60Hz.



Do I do this???


120VAC/230VAC = 0.52

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