This link will take you to the Hyperthrem site, they are starting a education section. I'm not pushing this brand, I will say that I own a 600. But most of the information can be used by any one that has a plasma unit. At least the major US brands, TD, Hyperthrem, Esab, Miller, Lincoln, Hobart.
I can not say if the offshore brands contain the same bits and pieces in the consumables.
Hyperthrem Cutting InstituteThe Hypertherm Cutting Institute is an online classroom that provides information about Hypertherm's plasma products and plasma cutting in general.
Some of the areas covered:
   Plasma Education
   Plasma Cutting Technology
   Reference Articles
   Grant Information
   Hypertherm Cutting Institute
   Registration   
   Plasma or Oxyfuel
   Published Articles
   Training Workshops
   Videos
   Webinars
   What is Plasma
Enjoy
By the way be prepared there is a quiz, at the end!