- 23rd January 2006, 12:04 #1

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## calculate thd

hi guys,

i am writing a code for measuring THD(total harmonic distortion) in a three phase power meter.can anyone explain what is THD and upto how many harmonics can be measured ?

i want measurement upto 41st harmonic

- 23rd January 2006, 12:04

- 23rd January 2006, 20:28 #2

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## how to calculate thd

Here's a pretty good definition of total harmonic distortion

http://en.wikipedia.org/wiki/Total_harmonic_distortion

The Fluke 430 claims to be able to track up to the 50th harmonic

http://us.fluke.com/usen/products/features.htm?cs_id=34651(FlukeProducts)&category=P HASE3(FlukeProducts)

Best regards,

v_c

- 23rd January 2006, 20:28

- 22nd December 2010, 00:17 #3

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