tasavirrasta

Could you clarify what tasavirrasta refers to? Is it a Finnish term meaning “from tasavirta” (direct current), a fictional concept, a place, a person, or something else? Also, do you want the article in Finnish or English, and should it describe real-world information or a fictional setting? Once I have the context, I’ll draft a concise, neutral wiki-style entry under 300 words.