ECN Forum Forums Technical Discussion Electrical Theory and Applications 3rd Harmonic

Two more questions for anyone.

If the 3rd Harmonics get trapped in the primary windings (delta) of the transformers and circulate and are released as heat, this has to be occuring at the primary POCO transformer as well. For instance, on a 480/277 service, the 3rd harmonic must go back to the POCO transformer and get trapped in it's primary, just like a 208/120 system?

Is this correct thinking?


The other question is:

How do they get to the primary from the secondary?

Back induction I assume..(if there is such a phrase)


Thanks


Dnk......