Skip to main content

Advertisement

Log in

Accelerated life testing for reliability improvement: a case study on Moulded Case Circuit Breaker (MCCB) mechanism

  • Case studies
  • Published:
International Journal of System Assurance Engineering and Management Aims and scope Submit manuscript

Abstract

MCCB plays a critical role in electricity distribution, and its failure may be costly and hazardous. According to Conseil International des Grands Réseaux Électriques (CIGRE) report CIGRE SC13 (High voltage circuit breaker reliability data for use in system reliability studies, CIGRE Publication, Paris, 1991), it is explored that majority of the circuit breaker failures (90%) occurred due to the failure of the mechanism. In this study, MCCB mechanism is under development stage due to which failure data of mechanism is not available to predict reliability. Therefore, it is essential to assess and improve reliability of MCCB mechanism to know and achieve higher reliability. This paper demonstrates the process of reliability assessment and improvement of the MCCB mechanism by using Boolean algebra and Accelerated Life Test (ALT). Further, Weibull distribution is selected for reliability prediction based on comparison with other distributions. Reliability of mechanism is compared with before improvement and after improvement conditions. In reliability testing, ALT is used, and the result shows that frequency of latch link failure is maximum due to denting and distortion of link. Further, few improvement measures are proposed based on design and manufacturing aspects, and results of suggested measures shows improvement in MCCB mechanism reliability from 72.44 to 95.06%. The design for reliability approach can be implemented rigorously if the failures identified at the development stage of the product, which helps to reduce the considerable losses in the future.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13
Fig. 14

Similar content being viewed by others

References

Download references

Acknowledgements

The authors acknowledge the support received from Larsen & Toubro Switchgear Ltd, Mumbai, Maharashtra, India.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Santosh B. Rane.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Rane, S.B., Potdar, P.R. & Rane, S. Accelerated life testing for reliability improvement: a case study on Moulded Case Circuit Breaker (MCCB) mechanism. Int J Syst Assur Eng Manag 10, 1668–1690 (2019). https://doi.org/10.1007/s13198-019-00914-6

Download citation

  • Received:

  • Revised:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s13198-019-00914-6

Keywords

Navigation