Influence of imperfect joints and geometrical tolerances on a circuit breaker dynamics

  • Narendra AkhadkarEmail author
  • Vincent Acary
  • Bernard Brogliato
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 73)


The aim of this paper is to understand the influence of clearances in the kinematic joints, dimensional and geometrical tolerances associated with the parts, on the performance of a circuit breaker mechanism in the trip operation. Operating mechanism and trip unit are the essential components of a miniature circuit breaker. The operating and trip mechanisms are made of ten parts with revolute and cylindrical joints with clearance, and five unilateral contacts with friction. This mechanism is based on quick-make and quick-break principle. The Moreau-Jean nonsmooth contact dynamics (NSCD) numerical method is used to perform the simulations. The numerical results are validated by careful comparisons with experimental data.


Joint clearance geometrical tolerances unilateral constraints Coulomb’s friction impacts circuit breaker 


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Narendra Akhadkar
    • 1
    Email author
  • Vincent Acary
    • 2
  • Bernard Brogliato
    • 2
  1. 1.Schneider ElectricMeylanFrance
  2. 2.Univ. Grenoble-Alpes, INRIA, CNRS, Grenoble INP, LJKGrenobleFrance

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