Standards and ratings for the application of molded case, insulated case, and power circuit breakers

Roybal, D.D.

doi:10.1109/papcon.2000.854225

Cited by 4 publications

References 2 publications

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An influence of new arc quenching methods for improving the interrupting capacity of low voltage circuit breaker

Jung‐Hun

Cho

Lim

et al. 2011

2011 1st International Conference on Electric Power Equipment - Switching Technology

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Low voltage circuit breakers are widely used in power distribution systems for rapid interruption of fault currents to assure the reliability of the power supply. While power distribution systems are demanding transformers with higher capacity than ever, there is an increase in the number of short-circuit current accidents. To prevent such accidents, molded case circuit breakers with improved short-circuit current interrupting capacity are needed. Improved interrupting capacity requires raising the increase rate of the arc voltage by current limiting and minimizing the thermal stress, mechanical disturbance, and interference from electronic devices. This paper is focusing on understanding the interrupting capability with respect to double contact structure, shape of grid, and puffer assisted self quenching that are based on the shape of the contact system in the current molded case circuit breaker. This paper also discusses the development of an arc diagnosis system for analyzing arc movement on the contact system.

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