Circuit breakers are main part of any power system, they are used to isolate the load from the source in any abnormal condition like if there is short circuit at load end or there is over current drawn by the load the Circuit breaker will break the connection of load and source by sensing from built in relay or external relay which is monitoring abnormal condition. In high Current or high-Power applications there can be arcing and sparking when contact are make or break so to minimize the arcing and sparking different techniques are used like Insulator Gases, Vacuum or Air forced between the contacts of breaker.

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