Development of Spring Life Test Apparatus and Life-Cycle Assessment of Extension Springs

  • Greegory MathewEmail author
  • Santosh B. Rane
  • Yogesh Patil
  • Sanjay V. Mohan
Conference paper
Part of the Lecture Notes in Mechanical Engineering book series (LNME)


Life-cycle test of moulded case circuit breakers (MCCB) on mechanical endurance test apparatus exhibited springs as the weak links. Therefore, improvement in the reliability of the circuit breaker mechanism was possible only with an improvement in the life of the springs. To evaluate spring life, a life-cycle test apparatus was developed which subjected springs to actual load conditions as experienced in MCCB. This paper describes the development and working of the test apparatus. The paper also explains how reliability of springs can be estimated using life data provided by the apparatus.


Reliability Fatigue failure Hook failure Weibull plot 



We express our special appreciation and thanks to Larsen and Toubro, EAIC, Mumbai, for encouraging this research and for providing the necessary resources, support and the motivation for carrying out this study.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Greegory Mathew
    • 1
    Email author
  • Santosh B. Rane
    • 2
  • Yogesh Patil
    • 3
  • Sanjay V. Mohan
    • 3
  1. 1.Dwarkadas J. Sanghvi College of EngineeringVile Parle, MumbaiIndia
  2. 2.Sardar Patel College of EngineeringAndheri, MumbaiIndia
  3. 3.L&T EAICMumbaiIndia

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