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Modeling And Simulation Of A Power Circuit Breaker

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1997 Annual Conference


Milwaukee, Wisconsin

Publication Date

June 15, 1997

Start Date

June 15, 1997

End Date

June 18, 1997



Page Count


Page Numbers

2.293.1 - 2.293.5



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Paper Authors

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Tian S. Lim

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NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Session 1559

Modeling and Simulation of A Power Circuit Breaker

Tian S. Lim United States Naval Academy


This paper describes modeling and simulation of a dc power circuit breaker. The circuit breaker can withstand a maximum voltage of 800 Volts dc and a maximum current of 75,000 Amperes. The circuit breaker arc voltage can rise to 1650 Volts during the time of contact separation, or 32 msec., and then drops to 800 Volts during the arcing time, or 30 msec., across open contacts. It necessitates the solving of a non-linear differential equation using ACSL (Advanced Continuous Simulation Language). ACSL is a simulation language designed for modeling and evaluating the performance of continuous systems described by time-dependent, nonlinear differential equations.


The interrupting capability of an air magnetic type circuit breaker is controlled principally by the ability of its arc chute to generate the required arc voltage. The magnitude of the arc voltage is given by the following approximate relationship 1 :

Va = 25(N+1) where: Va = arc voltage N = number of plates

For the type of breaker being considered for modeling, N = 65, the arc voltage is calculated as follows:

Va = 25(N+1) = 25(65+1) = 1650 Volts

The product of the arc voltage, the arc current, and the arcing time determines the total arc energy that has to be liberated by the interrupter. The equality states the following:

Vs (tc+ta) = Va ta


Lim, T. S. (1997, June), Modeling And Simulation Of A Power Circuit Breaker Paper presented at 1997 Annual Conference, Milwaukee, Wisconsin. 10.18260/1-2--6689

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