![]() ![]() Metallic separation plates are arc splitters and each of small compartments behave as a mini arc chute. The arc chute is divided into a number of small compartments by using metallic separation plates. The inner walls of arc chute are shaped in such a way that arc is not only forced into close proximity, but will drive into the serpentine channel projected on arc chute wall. Arc chute is made from some refractory material. The arc chute will help in achieving cooling. The circuit breaker is fitted with a chamber surrounding the contact. Related Post: How to Read MCB Nameplate Data Rating Printed on it? P lain air circuit breaker or Cross-Blast Air Circuit Breaker: Plain Break Type Air Break Circuit Breaker or Cross-Blast ACB.There are four types of ACBs used in the control and protection to maintain and stable operation of switch gears and indoor medium voltage. The circuit breaker is obsolete for medium voltage. The arcing gets initiated when arc contacts are separated. During opening of the main contact, the arc contact remains in touch with each other. When the breaker is opened, the main contact opens first. An additional pair of contact is made of carbon. ![]() The main pair carries the current and the contact made of copper. It is operated within voltage level up to 1 KV. As soon length of arc path is increased the resistance path will increase more arc voltage is applied across the arc path hence arc voltage is increased. Arc voltage can be increased by lengthening the arc path.By splitting the arc into a number of series will increases the arc voltage.As soon as the temperature of arc plasma motion of particle in arc plasma is reduced, more voltage gradient will be required to maintain the arc. Arc voltage can be increased by cooling arc plasma.The circuit breaker increases the voltage in three different ways: ![]() Arc voltage is defined as the minimum voltage required for maintaining arc. During interruption of arc, it creates an arc voltage instead of supply voltage. It does it same work, but in a different manner. The main aim of circuit breaker is to prevent reestablishment of arcing after current zero where the contact gap will withstand the system recovery voltage. The working principle of Air Circuit breaker is rather different from other types of circuit breaker. Principle of Operation of Air Circuit Breaker
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