the current zero interruption%2C in oil and air blast circuit breaker is achieved by

In oil circuit breaker the fixed contact and moving contact are immerged inside the insulating oil. Current Chopping in circuit breaker is defined as a phenomena in which current is forcibly interrupted before the natural current zero. For high voltages minimum oil, SF6 and blast-air breakers are used, but always with multiple interrupters in series; The maximum voltage per interrupter is 100 kV for air-blast and SF6 breakers, 170 kV for minimum oil breakers; Air circuit breakers (ACB) The circuit breaker which operates in air … 20. Air blast circuit breaker is used for (a) over currents (b) … TekTalksengineered 12,441 views In an oil circuit breaker or OCB, the separating contacts of the breaker are made to separate within an insulating oil because insulating oil has better insulating properties than air.

Current Chopping is mainly observed in Vacuum Circuit Breaker and Air Blast Circuit Breaker.

It is also good choice to avoid the risk of oil fire, in case of oil circuit breaker.

Air Blast Circuit Breaker is those kind of circuit breaker which operates in air at pressure of 20-30 kg/cm2. Disadvantages of Air Blast Circuit Breaker 2.1.

SF6 Circuit Breaker Part 1 Operation, Arc quenching inside interrupter with diagram explained - Duration: 5:37.

Contents hide 1. The arc interruption in oil is due to the generation of hydrogen gas because of the decomposition of oil. Hi friends, in this article, I am going to describe the oil circuit breakers construction and working principle.My article will increase your knowledge; I hope so. The current zero interruption, in oil and air blast circuit breakers, is achieved by (a) lengthening of the gap (b) cooling and blast effect (c) both (a) and (b) (d) deionizing the oil with forced air (e) none of the above Ans: c. 21.

This arc not only delays the current interruption process but it also produces heat in a huge quantity which may cause damage to the system or to the circuit breaker itself. Advantages of Air Blast Circuit Breaker 2. Therefore, the main issue in a circuit breaker is to extinguish the arc in the shortest possible time so that heat generated by it may not reach up to a hazardous value . Mineral oil has better insulating property than air.

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