Basic question

Is there a definition as to what constitutes an "isolated" vs. "non-isolated" circuit? What does this really mean? This is what I think the definition really is:

A system S1 has an input V1,In referenced to V2,In and an output V1,out referenced to V2,out whereas V1,In - V2,In has an operating limit of L1 and V1,out - V2,out has an operating limit of L2.

Is an isolated system a system that can have the references V2,In and V2,out such that |V2,In - V2,out| >> 0 and still operate properly? If so what value of |V2,In - V2,out| constitutes an "isolated system"?

Does anyone know of a formal definition of an "isolated" system? I know that usually it's some kind of LED operating on some kind of photo-sensitive device, but is that what the definition is limited to? I don't think so because a "relay" is usually called an isolated circuit.

"Jimbo"

** "Isolated" usually refers to "galvanic isolation" where no *electrically conductive* path exists between the devices or circuits concerned.

There is "transformer isolation", "optical isolation", "relay isolation" ... etc

Using a coupling capacitor between two circuits produces " DC isolation ".

Like most tech terms, the meaning cannot be defined OUT OF CONTEXT !!

FORGET trying to do that !!!!

** Yawn.....

** A relay provides "galvanic isolation" between the driving and switched circuits.

....... Phil

An isolated circuit is one that has a very high resistance to what it is isolated from. The contacts in a relay are isolated from the coil wire by the wire insulation, the bobbin the wire is wound on, and the insulation holding the contacts away from other things. All isolation has some voltage limit, above which current will take a short cut around the insulation and surface track or arc.

** Google Groper Fuckwit Top Poster Alert !!

** Learn to post facts and describe things adequately.

** There ALWAYS is.

That's why all real devices have RATINGS - you bloody FOOL

** You are seriously mentally defective.

GO AWAY !!

....... Phil

So what do you need to know? Do you want a definition of isolation, or an explanation of why your circuit falls over?

Phil, you need some hard man-love to relieve your tension. Come to Montreal, I'll show you where to go. You might want to come here in the first week of August. We accept autistic Touretters like you. Bring condoms.

Shocking!!!!

Luhan