How Oil Circuit Breakers Operating Mechanism Works ?

Hello Engineer's, I have one project on circuit breaker operating mechanism. I found many articles but, doesn't get any practical answer.

I found handful information on below website ..

"Introduction And Types Of Circuit Breakers(Types Of Circuit Breakers)":http://www.online-electrical-engineering.com/circuit-breakers/

But there is no proper operating mechanism is described. So, if anyone know the actual operating mechanism. Then, answer. Please....

There is quite a bit of material on the web, the topic is quite broad when you get into the details, since there are a number of implementations, although they all work on the same basic principle.
A search on your heading leads to a number of sites,
http://electrical4u.com/oil-circuit-breaker-bulk-and-minimum-oil-circuit-breaker/
is a useful one.
You are talking about high current and voltage, so the design of these devices is non trivial, particularly when you have to test the units, I have spent a little time in high voltage, high current testing facilities, it is not for the faint of heart,
cheers,
Richard